diff --git a/app/models/form/sales/pages/about_deposit_with_discount.rb b/app/models/form/sales/pages/about_deposit_with_discount.rb
index 5d1e41a95..4f1eed451 100644
--- a/app/models/form/sales/pages/about_deposit_with_discount.rb
+++ b/app/models/form/sales/pages/about_deposit_with_discount.rb
@@ -14,9 +14,9 @@ class Form::Sales::Pages::AboutDepositWithDiscount < ::Form::Page
 
   def depends_on
     if form.start_year_after_2024?
-      [{ "is_type_discount?" => true, "stairowned_100?" => @optional }]
+      [{ "social_homebuy?" => true, "stairowned_100?" => @optional }]
     else
-      [{ "is_type_discount?" => true }]
+      [{ "social_homebuy?" => true }]
     end
   end
 end
diff --git a/app/models/form/sales/pages/about_deposit_without_discount.rb b/app/models/form/sales/pages/about_deposit_without_discount.rb
index fdd74cf31..5747c3ed4 100644
--- a/app/models/form/sales/pages/about_deposit_without_discount.rb
+++ b/app/models/form/sales/pages/about_deposit_without_discount.rb
@@ -14,11 +14,11 @@ class Form::Sales::Pages::AboutDepositWithoutDiscount < ::Form::Page
 
   def depends_on
     if form.start_year_after_2024?
-      [{ "is_type_discount?" => false, "ownershipsch" => 1, "stairowned_100?" => @optional },
+      [{ "social_homebuy?" => false, "ownershipsch" => 1, "stairowned_100?" => @optional },
        { "ownershipsch" => 2 },
        { "ownershipsch" => 3, "mortgageused" => 1 }]
     else
-      [{ "is_type_discount?" => false, "ownershipsch" => 1 },
+      [{ "social_homebuy?" => false, "ownershipsch" => 1 },
        { "ownershipsch" => 2 },
        { "ownershipsch" => 3, "mortgageused" => 1 }]
     end
diff --git a/app/models/sales_log.rb b/app/models/sales_log.rb
index f35393a51..5223c249b 100644
--- a/app/models/sales_log.rb
+++ b/app/models/sales_log.rb
@@ -239,7 +239,7 @@ class SalesLog < Log
     ownershipsch == 3 || (ownershipsch == 2 && rent_to_buy_full_ownership?)
   end
 
-  def is_type_discount?
+  def social_homebuy?
     type == 18
   end
 
@@ -287,6 +287,13 @@ class SalesLog < Log
     mortgage_amount + deposit_amount + cashdis_amount
   end
 
+  def deposit_and_discount_total
+    deposit_amount = deposit || 0
+    cashdis_amount = cashdis || 0
+
+    deposit_amount + cashdis_amount
+  end
+
   def value_times_equity
     return unless value && equity
 
diff --git a/app/models/validations/sales/financial_validations.rb b/app/models/validations/sales/financial_validations.rb
index 6b36091ac..3e1d3dfb8 100644
--- a/app/models/validations/sales/financial_validations.rb
+++ b/app/models/validations/sales/financial_validations.rb
@@ -102,23 +102,6 @@ module Validations::Sales::FinancialValidations
     end
   end
 
-  def validate_shared_ownership_deposit(record)
-    return unless record.saledate && record.form.start_year_after_2024?
-    return unless record.mortgage || record.mortgageused == 2 || record.mortgageused == 3
-    return unless record.cashdis && record.deposit && record.value && record.equity
-
-    mortgage_value = record.mortgage || 0
-
-    if mortgage_value + record.deposit + record.cashdis != record.value * record.equity / 100
-      %i[mortgage value deposit ownershipsch cashdis equity].each do |field|
-        record.errors.add field, I18n.t("validations.financial.shared_ownership_deposit",
-                                        mortgage_deposit_and_discount_error_fields: record.mortgage_deposit_and_discount_error_fields,
-                                        mortgage_deposit_and_discount_total: record.field_formatted_as_currency("mortgage_deposit_and_discount_total"),
-                                        value_times_equity: record.field_formatted_as_currency("value_times_equity"))
-      end
-    end
-  end
-
   def validate_equity_less_than_staircase_difference(record)
     return unless record.equity && record.stairbought && record.stairowned
     return unless record.saledate && record.form.start_year_after_2024?
diff --git a/app/models/validations/sales/sale_information_validations.rb b/app/models/validations/sales/sale_information_validations.rb
index 883e10d1d..81054e830 100644
--- a/app/models/validations/sales/sale_information_validations.rb
+++ b/app/models/validations/sales/sale_information_validations.rb
@@ -107,53 +107,115 @@ module Validations::Sales::SaleInformationValidations
   end
 
   def validate_non_staircasing_mortgage(record)
+    return unless record.saledate && record.form.start_year_after_2024?
     return unless record.value && record.deposit && record.equity
-    return unless record.is_not_staircasing?
+    return unless record.shared_ownership_scheme? && record.type && record.mortgageused && record.is_not_staircasing?
+
+    if record.social_homebuy?
+      check_non_staircasing_socialhomebuy_mortgage(record)
+    else
+      check_non_staircasing_non_socialhomebuy_mortgage(record)
+    end
+  end
+
+  def validate_staircasing_mortgage(record)
     return unless record.saledate && record.form.start_year_after_2024?
+    return unless record.value && record.deposit && record.stairbought
+    return unless record.shared_ownership_scheme? && record.type && record.mortgageused && record.is_staircase?
+
+    if record.social_homebuy?
+      check_staircasing_socialhomebuy_mortgage(record)
+    else
+      check_staircasing_non_socialhomebuy_mortgage(record)
+    end
+  end
+
+  def validate_mortgage_used_and_stairbought(record)
+    return unless record.stairowned && record.mortgageused
+
+    if !record.stairowned_100? && record.mortgageused == 3
+      record.errors.add :stairowned, I18n.t("validations.sale_information.stairowned.mortgageused_dont_know")
+      record.errors.add :mortgageused, I18n.t("validations.sale_information.stairowned.mortgageused_dont_know")
+    end
+  end
+
+  def check_non_staircasing_socialhomebuy_mortgage(record)
+    return unless record.cashdis
+
+    if record.mortgage_used?
+      return unless record.mortgage
+
+      if over_tolerance?(record.mortgage_deposit_and_discount_total, record.expected_shared_ownership_deposit_value, 1)
+        %i[mortgage value deposit cashdis equity].each do |field|
+          record.errors.add field, I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_used_socialhomebuy", mortgage_deposit_and_discount_total: record.field_formatted_as_currency("mortgage_deposit_and_discount_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
+        end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_used_socialhomebuy", mortgage_deposit_and_discount_total: record.field_formatted_as_currency("mortgage_deposit_and_discount_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
+      end
+    elsif record.mortgage_not_used?
+      if over_tolerance?(record.deposit_and_discount_total, record.expected_shared_ownership_deposit_value, 1)
+        %i[mortgageused value deposit cashdis equity].each do |field|
+          record.errors.add field, I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_not_used_socialhomebuy", deposit_and_discount_total: record.field_formatted_as_currency("deposit_and_discount_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
+        end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_not_used_socialhomebuy", deposit_and_discount_total: record.field_formatted_as_currency("deposit_and_discount_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
+      end
+    end
+  end
 
+  def check_non_staircasing_non_socialhomebuy_mortgage(record)
     if record.mortgage_used?
       return unless record.mortgage
 
-      if record.mortgage_and_deposit_total != record.expected_shared_ownership_deposit_value
+      if over_tolerance?(record.mortgage_and_deposit_total, record.expected_shared_ownership_deposit_value, 1)
         %i[mortgage value deposit equity].each do |field|
           record.errors.add field, I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_used", mortgage_and_deposit_total: record.field_formatted_as_currency("mortgage_and_deposit_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
         end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_used", mortgage_and_deposit_total: record.field_formatted_as_currency("mortgage_and_deposit_total"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
       end
     elsif record.mortgage_not_used?
-      if record.deposit != record.expected_shared_ownership_deposit_value
+      if over_tolerance?(record.deposit, record.expected_shared_ownership_deposit_value, 1)
         %i[mortgageused value deposit equity].each do |field|
           record.errors.add field, I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_not_used", deposit: record.field_formatted_as_currency("deposit"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
         end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.non_staircasing_mortgage.mortgage_not_used", deposit: record.field_formatted_as_currency("deposit"), expected_shared_ownership_deposit_value: record.field_formatted_as_currency("expected_shared_ownership_deposit_value"))
       end
     end
   end
 
-  def validate_staircasing_mortgage(record)
-    return unless record.mortgageused && record.value && record.deposit && record.stairbought
-    return unless record.is_staircase?
-    return unless record.saledate && record.form.start_year_after_2024?
+  def check_staircasing_socialhomebuy_mortgage(record)
+    return unless record.cashdis
 
     if record.mortgage_used?
       return unless record.mortgage
 
-      if record.mortgage_and_deposit_total != record.stairbought_part_of_value
-        %i[mortgage value deposit stairbought].each do |field|
-          record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_used", mortgage_and_deposit_total: record.field_formatted_as_currency("mortgage_and_deposit_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
+      if over_tolerance?(record.mortgage_deposit_and_discount_total, record.stairbought_part_of_value, 1)
+        %i[mortgage value deposit cashdis stairbought].each do |field|
+          record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_used_socialhomebuy", mortgage_deposit_and_discount_total: record.field_formatted_as_currency("mortgage_deposit_and_discount_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
         end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.staircasing_mortgage.mortgage_used_socialhomebuy", mortgage_deposit_and_discount_total: record.field_formatted_as_currency("mortgage_deposit_and_discount_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
       end
-    elsif record.deposit != record.stairbought_part_of_value
-      %i[mortgageused value deposit stairbought].each do |field|
-        record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_not_used", deposit: record.field_formatted_as_currency("deposit"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
+    elsif over_tolerance?(record.deposit_and_discount_total, record.stairbought_part_of_value, 1)
+      %i[mortgageused value deposit cashdis stairbought].each do |field|
+        record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_not_used_socialhomebuy", deposit_and_discount_total: record.field_formatted_as_currency("deposit_and_discount_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
       end
+      record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.staircasing_mortgage.mortgage_not_used_socialhomebuy", deposit_and_discount_total: record.field_formatted_as_currency("deposit_and_discount_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
     end
   end
 
-  def validate_mortgage_used_and_stairbought(record)
-    return unless record.stairowned && record.mortgageused
+  def check_staircasing_non_socialhomebuy_mortgage(record)
+    if record.mortgage_used?
+      return unless record.mortgage
 
-    if !record.stairowned_100? && record.mortgageused == 3
-      record.errors.add :stairowned, I18n.t("validations.sale_information.stairowned.mortgageused_dont_know")
-      record.errors.add :mortgageused, I18n.t("validations.sale_information.stairowned.mortgageused_dont_know")
+      if over_tolerance?(record.mortgage_and_deposit_total, record.stairbought_part_of_value, 1)
+        %i[mortgage value deposit stairbought type].each do |field|
+          record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_used", mortgage_and_deposit_total: record.field_formatted_as_currency("mortgage_and_deposit_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
+        end
+        record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.staircasing_mortgage.mortgage_used", mortgage_and_deposit_total: record.field_formatted_as_currency("mortgage_and_deposit_total"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
+      end
+    elsif over_tolerance?(record.deposit, record.stairbought_part_of_value, 1)
+      %i[mortgageused value deposit stairbought type].each do |field|
+        record.errors.add field, I18n.t("validations.sale_information.staircasing_mortgage.mortgage_not_used", deposit: record.field_formatted_as_currency("deposit"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
+      end
+      record.errors.add :type, :skip_bu_error, message: I18n.t("validations.sale_information.staircasing_mortgage.mortgage_not_used", deposit: record.field_formatted_as_currency("deposit"), stairbought_part_of_value: record.field_formatted_as_currency("stairbought_part_of_value"))
     end
   end
 
@@ -170,4 +232,8 @@ module Validations::Sales::SaleInformationValidations
       record.errors.add(:mortgageused, I18n.t("validations.invalid_option", question: "Was a mortgage used for the purchase of this property?"))
     end
   end
+
+  def over_tolerance?(expected, actual, tolerance)
+    (expected - actual).abs >= tolerance
+  end
 end
diff --git a/app/models/validations/sales/soft_validations.rb b/app/models/validations/sales/soft_validations.rb
index 14c0afae4..51326a2f4 100644
--- a/app/models/validations/sales/soft_validations.rb
+++ b/app/models/validations/sales/soft_validations.rb
@@ -1,4 +1,6 @@
 module Validations::Sales::SoftValidations
+  include Validations::Sales::SaleInformationValidations
+
   ALLOWED_INCOME_RANGES_SALES = {
     1 => OpenStruct.new(soft_min: 5000),
     2 => OpenStruct.new(soft_min: 1500),
@@ -86,14 +88,10 @@ module Validations::Sales::SoftValidations
   def shared_ownership_deposit_invalid?
     return unless saledate && collection_start_year <= 2023
     return unless mortgage || mortgageused == 2 || mortgageused == 3
-    return unless cashdis || !is_type_discount?
+    return unless cashdis || !social_homebuy?
     return unless deposit && value && equity
 
-    !within_tolerance?(mortgage_deposit_and_discount_total, value * equity / 100, 1)
-  end
-
-  def within_tolerance?(expected, actual, tolerance)
-    (expected - actual).abs <= tolerance
+    over_tolerance?(mortgage_deposit_and_discount_total, value * equity / 100, 1)
   end
 
   def mortgage_plus_deposit_less_than_discounted_value?
diff --git a/app/services/bulk_upload/sales/year2024/row_parser.rb b/app/services/bulk_upload/sales/year2024/row_parser.rb
index f1124f79d..87d6b491c 100644
--- a/app/services/bulk_upload/sales/year2024/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2024/row_parser.rb
@@ -513,6 +513,7 @@ class BulkUpload::Sales::Year2024::RowParser
 
       fields.each do |field|
         next if errors.include?(field)
+        next if error.type == :skip_bu_error
 
         question = log.form.get_question(error.attribute, log)
 
@@ -721,16 +722,16 @@ private
       lanomagr: %i[field_97],
       frombeds: %i[field_98],
       fromprop: %i[field_99],
-      value: %i[field_101 field_114 field_125],
+      value: value_fields,
       equity: %i[field_102],
-      mortgage: %i[field_104 field_118 field_127],
-      extrabor: %i[field_108 field_122 field_129],
-      deposit: %i[field_109 field_123 field_130],
+      mortgage: mortgage_fields,
+      extrabor: extrabor_fields,
+      deposit: deposit_fields,
       cashdis: %i[field_110],
       mrent: %i[field_111],
 
-      has_mscharge: %i[field_112 field_124 field_131],
-      mscharge: %i[field_112 field_124 field_131],
+      has_mscharge: mscharge_fields,
+      mscharge: mscharge_fields,
       grant: %i[field_115],
       discount: %i[field_116],
       othtype: %i[field_12],
@@ -741,12 +742,12 @@ private
       hhregresstill: %i[field_73],
       armedforcesspouse: %i[field_74],
 
-      mortgagelender: %i[field_105 field_119],
-      mortgagelenderother: %i[field_106 field_120],
+      mortgagelender: mortgagelender_fields,
+      mortgagelenderother: mortgagelenderother_fields,
 
       hb: %i[field_81],
-      mortlen: %i[field_107 field_121 field_128],
-      proplen: %i[field_113 field_85],
+      mortlen: mortlen_fields,
+      proplen: proplen_fields,
 
       jointmore: %i[field_16],
       staircase: %i[field_86],
@@ -762,7 +763,7 @@ private
       stairbought: %i[field_87],
       stairowned: %i[field_88],
       socprevten: %i[field_100],
-      mortgageused: [mortgageused_field],
+      mortgageused: mortgageused_fields,
 
       uprn: %i[field_22],
       address_line1: %i[field_23],
@@ -1118,10 +1119,81 @@ private
     return field_126 if outright_sale?
   end
 
-  def mortgageused_field
-    return :field_103 if shared_ownership?
-    return :field_117 if discounted_ownership?
-    return :field_126 if outright_sale?
+  def value_fields
+    return [:field_101] if shared_ownership?
+    return [:field_114] if discounted_ownership?
+    return [:field_125] if outright_sale?
+
+    %i[field_101 field_114 field_125]
+  end
+
+  def mortgage_fields
+    return [:field_104] if shared_ownership?
+    return [:field_118] if discounted_ownership?
+    return [:field_127] if outright_sale?
+
+    %i[field_104 field_118 field_127]
+  end
+
+  def extrabor_fields
+    return [:field_108] if shared_ownership?
+    return [:field_122] if discounted_ownership?
+    return [:field_129] if outright_sale?
+
+    %i[field_108 field_122 field_129]
+  end
+
+  def deposit_fields
+    return [:field_109] if shared_ownership?
+    return [:field_123] if discounted_ownership?
+    return [:field_130] if outright_sale?
+
+    %i[field_109 field_123 field_130]
+  end
+
+  def mscharge_fields
+    return [:field_112] if shared_ownership?
+    return [:field_124] if discounted_ownership?
+    return [:field_131] if outright_sale?
+
+    %i[field_112 field_124 field_131]
+  end
+
+  def mortgagelender_fields
+    return [:field_105] if shared_ownership?
+    return [:field_119] if discounted_ownership?
+
+    %i[field_105 field_119]
+  end
+
+  def mortgagelenderother_fields
+    return [:field_106] if shared_ownership?
+    return [:field_120] if discounted_ownership?
+
+    %i[field_106 field_120]
+  end
+
+  def mortlen_fields
+    return [:field_107] if shared_ownership?
+    return [:field_121] if discounted_ownership?
+    return [:field_128] if outright_sale?
+
+    %i[field_107 field_121 field_128]
+  end
+
+  def proplen_fields
+    return [:field_85] if shared_ownership?
+    return [:field_113] if discounted_ownership?
+
+    %i[field_85 field_113]
+  end
+
+  def mortgageused_fields
+    return [:field_103] if shared_ownership?
+    return [:field_117] if discounted_ownership?
+    return [:field_126] if outright_sale?
+
+    %i[field_103 field_117 field_126]
   end
 
   def owning_organisation
diff --git a/config/locales/en.yml b/config/locales/en.yml
index afbba3e2c..2f3e63020 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -641,11 +641,15 @@ en:
         over_discounted_london_max: "The percentage discount multiplied by the purchase price is %{discount_value}. This figure should not be more than £136,400 for properties in London."
         over_discounted_max: "The percentage discount multiplied by the purchase price is %{discount_value}. This figure should not be more than £102,400 for properties outside of London."
       non_staircasing_mortgage:
-        mortgage_used: "The mortgage and deposit added together is %{mortgage_and_deposit_total} and the purchase price times by the equity is %{expected_shared_ownership_deposit_value}. These figures should be the same."
-        mortgage_not_used: "The deposit is %{deposit} and the purchase price times by the equity is %{expected_shared_ownership_deposit_value}. As no mortgage was used, these figures should be the same."
+        mortgage_used: "The mortgage and deposit added together is %{mortgage_and_deposit_total}. The value multiplied by the percentage bought is %{expected_shared_ownership_deposit_value}. These figures should be the same."
+        mortgage_not_used: "The deposit is %{deposit} and the value multiplied by the percentage bought is %{expected_shared_ownership_deposit_value}. These figures should be the same."
+        mortgage_used_socialhomebuy: "The mortgage, deposit, and cash discount added together is %{mortgage_deposit_and_discount_total}. The value multiplied by the percentage bought is %{expected_shared_ownership_deposit_value}. These figures should be the same."
+        mortgage_not_used_socialhomebuy: "The deposit and cash discount added together is %{deposit_and_discount_total}. The value multiplied by the percentage bought is %{expected_shared_ownership_deposit_value}. These figures should be the same."
       staircasing_mortgage:
-        mortgage_used: "The mortgage and deposit added together is %{mortgage_and_deposit_total} and the percentage bought times the purchase price is %{stairbought_part_of_value}. These figures should be the same."
-        mortgage_not_used: "The deposit is %{deposit} and the percentage bought times the purchase price is %{stairbought_part_of_value}. As no mortgage was used, these figures should be the same."
+        mortgage_used: "The mortgage and deposit added together is %{mortgage_and_deposit_total}. The value multiplied by the percentage bought is %{stairbought_part_of_value}. These figures should be the same."
+        mortgage_not_used: "The deposit is %{deposit} and the value multiplied by the percentage bought is %{stairbought_part_of_value}. These figures should be the same."
+        mortgage_used_socialhomebuy: "The mortgage, deposit, and cash discount added together is %{mortgage_deposit_and_discount_total}. The value multiplied by the percentage bought is %{stairbought_part_of_value}. These figures should be the same."
+        mortgage_not_used_socialhomebuy: "The deposit and cash discount added together is %{deposit_and_discount_total}. The value multiplied by the percentage bought is %{stairbought_part_of_value}. These figures should be the same."
       stairowned:
         mortgageused_dont_know: "The percentage owned has to be 100% if the mortgage used is 'Don’t know'"
     merge_request:
diff --git a/spec/models/form/sales/pages/about_deposit_with_discount_spec.rb b/spec/models/form/sales/pages/about_deposit_with_discount_spec.rb
index 4cffb2b54..fabfb7836 100644
--- a/spec/models/form/sales/pages/about_deposit_with_discount_spec.rb
+++ b/spec/models/form/sales/pages/about_deposit_with_discount_spec.rb
@@ -33,7 +33,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithDiscount, type: :model do
 
   it "has correct depends_on" do
     expect(page.depends_on).to eq(
-      [{ "is_type_discount?" => true }],
+      [{ "social_homebuy?" => true }],
     )
   end
 
@@ -42,7 +42,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithDiscount, type: :model do
 
     it "has correct depends_on" do
       expect(page.depends_on).to eq(
-        [{ "is_type_discount?" => true }],
+        [{ "social_homebuy?" => true }],
       )
     end
   end
@@ -54,7 +54,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithDiscount, type: :model do
 
     it "has correct depends_on" do
       expect(page.depends_on).to eq(
-        [{ "is_type_discount?" => true, "stairowned_100?" => false }],
+        [{ "social_homebuy?" => true, "stairowned_100?" => false }],
       )
     end
 
@@ -63,7 +63,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithDiscount, type: :model do
 
       it "has correct depends_on" do
         expect(page.depends_on).to eq(
-          [{ "is_type_discount?" => true, "stairowned_100?" => true }],
+          [{ "social_homebuy?" => true, "stairowned_100?" => true }],
         )
       end
     end
diff --git a/spec/models/form/sales/pages/about_deposit_without_discount_spec.rb b/spec/models/form/sales/pages/about_deposit_without_discount_spec.rb
index d6f58c65f..003313353 100644
--- a/spec/models/form/sales/pages/about_deposit_without_discount_spec.rb
+++ b/spec/models/form/sales/pages/about_deposit_without_discount_spec.rb
@@ -33,7 +33,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithoutDiscount, type: :model do
 
   it "has correct depends_on" do
     expect(page.depends_on).to eq(
-      [{ "is_type_discount?" => false, "ownershipsch" => 1 },
+      [{ "social_homebuy?" => false, "ownershipsch" => 1 },
        { "ownershipsch" => 2 },
        { "ownershipsch" => 3, "mortgageused" => 1 }],
     )
@@ -44,7 +44,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithoutDiscount, type: :model do
 
     it "has correct depends_on" do
       expect(page.depends_on).to eq(
-        [{ "is_type_discount?" => false, "ownershipsch" => 1 },
+        [{ "social_homebuy?" => false, "ownershipsch" => 1 },
          { "ownershipsch" => 2 },
          { "ownershipsch" => 3, "mortgageused" => 1 }],
       )
@@ -58,7 +58,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithoutDiscount, type: :model do
 
     it "has correct depends_on" do
       expect(page.depends_on).to eq(
-        [{ "is_type_discount?" => false, "ownershipsch" => 1, "stairowned_100?" => false },
+        [{ "social_homebuy?" => false, "ownershipsch" => 1, "stairowned_100?" => false },
          { "ownershipsch" => 2 },
          { "ownershipsch" => 3, "mortgageused" => 1 }],
       )
@@ -69,7 +69,7 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithoutDiscount, type: :model do
 
       it "has correct depends_on" do
         expect(page.depends_on).to eq(
-          [{ "is_type_discount?" => false, "ownershipsch" => 1, "stairowned_100?" => true },
+          [{ "social_homebuy?" => false, "ownershipsch" => 1, "stairowned_100?" => true },
            { "ownershipsch" => 2 },
            { "ownershipsch" => 3, "mortgageused" => 1 }],
         )
diff --git a/spec/models/validations/sales/financial_validations_spec.rb b/spec/models/validations/sales/financial_validations_spec.rb
index e52387987..316c2d175 100644
--- a/spec/models/validations/sales/financial_validations_spec.rb
+++ b/spec/models/validations/sales/financial_validations_spec.rb
@@ -432,181 +432,6 @@ RSpec.describe Validations::Sales::FinancialValidations do
     end
   end
 
-  describe "#validate_shared_ownership_deposit" do
-    let(:record) { FactoryBot.create(:sales_log, saledate: now) }
-
-    around do |example|
-      Timecop.freeze(now) do
-        Singleton.__init__(FormHandler)
-        example.run
-      end
-      Timecop.return
-    end
-
-    context "with a log in the 24/25 collection year" do
-      let(:now) { Time.zone.local(2024, 4, 2) }
-
-      it "does not add an error if MORTGAGE + DEPOSIT + CASHDIS are equal VALUE * EQUITY/100" do
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "does not add an error if mortgage is used and no mortgage is given" do
-        record.mortgage = nil
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "adds an error if mortgage is not used and no mortgage is given" do
-        record.mortgage = nil
-        record.mortgageused = 2
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to include("The mortgage, deposit, and cash discount added together is £2,000.00. The value times the equity percentage is £3,000.00. These figures should be the same")
-        expect(record.errors["deposit"]).to include("The mortgage, deposit, and cash discount added together is £2,000.00. The value times the equity percentage is £3,000.00. These figures should be the same")
-        expect(record.errors["cashdis"]).to include("The mortgage, deposit, and cash discount added together is £2,000.00. The value times the equity percentage is £3,000.00. These figures should be the same")
-        expect(record.errors["value"]).to include("The mortgage, deposit, and cash discount added together is £2,000.00. The value times the equity percentage is £3,000.00. These figures should be the same")
-        expect(record.errors["equity"]).to include("The mortgage, deposit, and cash discount added together is £2,000.00. The value times the equity percentage is £3,000.00. These figures should be the same")
-      end
-
-      it "does not add an error if no deposit is given" do
-        record.mortgage = 1000
-        record.deposit = nil
-        record.cashdis = 1000
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "does not add an error if no cashdis is given and cashdis is routed to" do
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.type = 18
-        record.cashdis = nil
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "does not add an error if no cashdis is given and cashdis is not routed to" do
-        record.mortgageused = 1
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.type = 2
-        record.cashdis = nil
-        record.value = 3000
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "does not add an error if no value is given" do
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = nil
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "does not add an error if no equity is given" do
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 3000
-        record.equity = nil
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-
-      it "adds an error if MORTGAGE + DEPOSIT + CASHDIS are not equal VALUE * EQUITY/100" do
-        record.mortgageused = 1
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 4323
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to include("The mortgage, deposit, and cash discount added together is £3,000.00. The value times the equity percentage is £4,323.00. These figures should be the same")
-        expect(record.errors["deposit"]).to include("The mortgage, deposit, and cash discount added together is £3,000.00. The value times the equity percentage is £4,323.00. These figures should be the same")
-        expect(record.errors["cashdis"]).to include("The mortgage, deposit, and cash discount added together is £3,000.00. The value times the equity percentage is £4,323.00. These figures should be the same")
-        expect(record.errors["value"]).to include("The mortgage, deposit, and cash discount added together is £3,000.00. The value times the equity percentage is £4,323.00. These figures should be the same")
-        expect(record.errors["equity"]).to include("The mortgage, deposit, and cash discount added together is £3,000.00. The value times the equity percentage is £4,323.00. These figures should be the same")
-      end
-    end
-
-    context "with a log in 23/24 collection year" do
-      let(:now) { Time.zone.local(2024, 1, 1) }
-
-      it "does not add an error if MORTGAGE + DEPOSIT + CASHDIS are not equal VALUE * EQUITY/100" do
-        record.mortgage = 1000
-        record.deposit = 1000
-        record.cashdis = 1000
-        record.value = 4323
-        record.equity = 100
-
-        financial_validator.validate_shared_ownership_deposit(record)
-        expect(record.errors["mortgage"]).to be_empty
-        expect(record.errors["deposit"]).to be_empty
-        expect(record.errors["cashdis"]).to be_empty
-        expect(record.errors["value"]).to be_empty
-        expect(record.errors["equity"]).to be_empty
-      end
-    end
-  end
-
   describe "#validate_equity_less_than_staircase_difference" do
     let(:record) { FactoryBot.create(:sales_log, saledate: now) }
 
diff --git a/spec/models/validations/sales/sale_information_validations_spec.rb b/spec/models/validations/sales/sale_information_validations_spec.rb
index ca07da6f4..4da297f53 100644
--- a/spec/models/validations/sales/sale_information_validations_spec.rb
+++ b/spec/models/validations/sales/sale_information_validations_spec.rb
@@ -740,10 +740,45 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
 
           it "adds an error" do
             sale_information_validator.validate_non_staircasing_mortgage(record)
-            expect(record.errors["mortgage"]).to include("The mortgage and deposit added together is £15,000.00 and the purchase price times by the equity is £8,400.00. These figures should be the same.")
-            expect(record.errors["value"]).to include("The mortgage and deposit added together is £15,000.00 and the purchase price times by the equity is £8,400.00. These figures should be the same.")
-            expect(record.errors["deposit"]).to include("The mortgage and deposit added together is £15,000.00 and the purchase price times by the equity is £8,400.00. These figures should be the same.")
-            expect(record.errors["equity"]).to include("The mortgage and deposit added together is £15,000.00 and the purchase price times by the equity is £8,400.00. These figures should be the same.")
+            expect(record.errors["mortgage"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["value"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["deposit"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["equity"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["type"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["cashdis"]).not_to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+          end
+
+          context "and it is a social homebuy" do
+            before do
+              record.type = 18
+              record.cashdis = "200"
+            end
+
+            it "adds an error" do
+              sale_information_validator.validate_non_staircasing_mortgage(record)
+              expect(record.errors["mortgage"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["value"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["deposit"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["equity"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["cashdis"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["type"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            end
+          end
+
+          context "and it is not a shared ownership transaction" do
+            before do
+              record.ownershipsch = 2
+            end
+
+            it "does not add an error" do
+              sale_information_validator.validate_non_staircasing_mortgage(record)
+              expect(record.errors["mortgage"]).to be_empty
+              expect(record.errors["value"]).to be_empty
+              expect(record.errors["deposit"]).to be_empty
+              expect(record.errors["equity"]).to be_empty
+              expect(record.errors["cashdis"]).to be_empty
+              expect(record.errors["type"]).to be_empty
+            end
           end
         end
 
@@ -758,12 +793,14 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
             expect(record.errors["value"]).to be_empty
             expect(record.errors["deposit"]).to be_empty
             expect(record.errors["equity"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
           end
         end
       end
 
       context "when MORTGAGE + DEPOSIT equals VALUE * EQUITY/100" do
-        let(:record) { FactoryBot.build(:sales_log, mortgage: 10_000, staircase: 2, deposit: 5_000, value: 30_000, equity: 50, ownershipsch: 1, type: 30, saledate: now) }
+        let(:record) { FactoryBot.build(:sales_log, mortgageused: 1, mortgage: 10_000, staircase: 2, deposit: 5_000, value: 30_000, equity: 50, ownershipsch: 1, type: 30, saledate: now) }
 
         it "does not add an error" do
           sale_information_validator.validate_non_staircasing_mortgage(record)
@@ -771,6 +808,22 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
           expect(record.errors["value"]).to be_empty
           expect(record.errors["deposit"]).to be_empty
           expect(record.errors["equity"]).to be_empty
+          expect(record.errors["cashdis"]).to be_empty
+          expect(record.errors["type"]).to be_empty
+        end
+      end
+
+      context "when MORTGAGE + DEPOSIT is within 1£ tolerance of VALUE * EQUITY/100" do
+        let(:record) { FactoryBot.build(:sales_log, mortgageused: 1, mortgage: 10_000, staircase: 2, deposit: 50_000, value: 120_001, equity: 50, ownershipsch: 1, type: 30, saledate: now) }
+
+        it "does not add an error" do
+          sale_information_validator.validate_non_staircasing_mortgage(record)
+          expect(record.errors["mortgage"]).to be_empty
+          expect(record.errors["value"]).to be_empty
+          expect(record.errors["deposit"]).to be_empty
+          expect(record.errors["equity"]).to be_empty
+          expect(record.errors["cashdis"]).to be_empty
+          expect(record.errors["type"]).to be_empty
         end
       end
 
@@ -787,10 +840,45 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
 
             it "adds an error" do
               sale_information_validator.validate_non_staircasing_mortgage(record)
-              expect(record.errors["mortgageused"]).to include("The deposit is £5,000.00 and the purchase price times by the equity is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["value"]).to include("The deposit is £5,000.00 and the purchase price times by the equity is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["deposit"]).to include("The deposit is £5,000.00 and the purchase price times by the equity is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["equity"]).to include("The deposit is £5,000.00 and the purchase price times by the equity is £8,400.00. As no mortgage was used, these figures should be the same.")
+              expect(record.errors["mortgageused"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["value"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["deposit"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["equity"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["type"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["cashdis"]).not_to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            end
+
+            context "and it is a social homebuy" do
+              before do
+                record.type = 18
+                record.cashdis = "200"
+              end
+
+              it "adds an error" do
+                sale_information_validator.validate_non_staircasing_mortgage(record)
+                expect(record.errors["mortgageused"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["value"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["deposit"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["equity"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["cashdis"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["type"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              end
+            end
+
+            context "and it is not a shared ownership transaction" do
+              before do
+                record.ownershipsch = 2
+              end
+
+              it "does not add an error" do
+                sale_information_validator.validate_non_staircasing_mortgage(record)
+                expect(record.errors["mortgageused"]).to be_empty
+                expect(record.errors["value"]).to be_empty
+                expect(record.errors["deposit"]).to be_empty
+                expect(record.errors["equity"]).to be_empty
+                expect(record.errors["cashdis"]).to be_empty
+                expect(record.errors["type"]).to be_empty
+              end
             end
           end
 
@@ -805,6 +893,8 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
               expect(record.errors["value"]).to be_empty
               expect(record.errors["deposit"]).to be_empty
               expect(record.errors["equity"]).to be_empty
+              expect(record.errors["cashdis"]).to be_empty
+              expect(record.errors["type"]).to be_empty
             end
           end
         end
@@ -818,6 +908,22 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
             expect(record.errors["value"]).to be_empty
             expect(record.errors["deposit"]).to be_empty
             expect(record.errors["equity"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
+          end
+        end
+
+        context "when DEPOSIT is within 1£ tolerance of VALUE * EQUITY/100" do
+          let(:record) { FactoryBot.build(:sales_log, mortgageused: 2, staircase: 2, deposit: 15_000, value: 30_001, equity: 50, ownershipsch: 1, type: 30, saledate: now) }
+
+          it "does not add an error" do
+            sale_information_validator.validate_non_staircasing_mortgage(record)
+            expect(record.errors["mortgageused"]).to be_empty
+            expect(record.errors["value"]).to be_empty
+            expect(record.errors["deposit"]).to be_empty
+            expect(record.errors["equity"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
           end
         end
       end
@@ -833,6 +939,8 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
         expect(record.errors["value"]).to be_empty
         expect(record.errors["deposit"]).to be_empty
         expect(record.errors["equity"]).to be_empty
+        expect(record.errors["cashdis"]).to be_empty
+        expect(record.errors["type"]).to be_empty
       end
     end
   end
@@ -860,10 +968,45 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
 
           it "adds an error" do
             sale_information_validator.validate_staircasing_mortgage(record)
-            expect(record.errors["mortgage"]).to include("The mortgage and deposit added together is £15,000.00 and the percentage bought times the purchase price is £8,400.00. These figures should be the same.")
-            expect(record.errors["value"]).to include("The mortgage and deposit added together is £15,000.00 and the percentage bought times the purchase price is £8,400.00. These figures should be the same.")
-            expect(record.errors["deposit"]).to include("The mortgage and deposit added together is £15,000.00 and the percentage bought times the purchase price is £8,400.00. These figures should be the same.")
-            expect(record.errors["stairbought"]).to include("The mortgage and deposit added together is £15,000.00 and the percentage bought times the purchase price is £8,400.00. These figures should be the same.")
+            expect(record.errors["mortgage"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["value"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["deposit"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["stairbought"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["type"]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            expect(record.errors["cashdis"]).not_to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+          end
+
+          context "and it is a social homebuy" do
+            before do
+              record.type = 18
+              record.cashdis = "200"
+            end
+
+            it "adds an error" do
+              sale_information_validator.validate_staircasing_mortgage(record)
+              expect(record.errors["mortgage"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["value"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["deposit"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["stairbought"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["cashdis"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["type"]).to include("The mortgage, deposit, and cash discount added together is £15,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            end
+          end
+
+          context "and it is not a shared ownership transaction" do
+            before do
+              record.ownershipsch = 2
+            end
+
+            it "does not add an error" do
+              sale_information_validator.validate_non_staircasing_mortgage(record)
+              expect(record.errors["mortgage"]).to be_empty
+              expect(record.errors["value"]).to be_empty
+              expect(record.errors["deposit"]).to be_empty
+              expect(record.errors["stairbought"]).to be_empty
+              expect(record.errors["cashdis"]).to be_empty
+              expect(record.errors["type"]).to be_empty
+            end
           end
         end
 
@@ -878,12 +1021,14 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
             expect(record.errors["value"]).to be_empty
             expect(record.errors["deposit"]).to be_empty
             expect(record.errors["stairbought"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
           end
         end
       end
 
       context "when MORTGAGE + DEPOSIT equals STAIRBOUGHT/100 * VALUE" do
-        let(:record) { FactoryBot.build(:sales_log, mortgage: 10_000, staircase: 1, deposit: 5_000, value: 30_000, stairbought: 50, ownershipsch: 1, type: 30, saledate: now) }
+        let(:record) { FactoryBot.build(:sales_log, mortgageused: 1, mortgage: 10_000, staircase: 1, deposit: 5_000, value: 30_000, stairbought: 50, ownershipsch: 1, type: 30, saledate: now) }
 
         it "does not add an error" do
           sale_information_validator.validate_staircasing_mortgage(record)
@@ -891,6 +1036,22 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
           expect(record.errors["value"]).to be_empty
           expect(record.errors["deposit"]).to be_empty
           expect(record.errors["stairbought"]).to be_empty
+          expect(record.errors["cashdis"]).to be_empty
+          expect(record.errors["type"]).to be_empty
+        end
+      end
+
+      context "when MORTGAGE + DEPOSIT is within 1£ tolerance of STAIRBOUGHT/100 * VALUE" do
+        let(:record) { FactoryBot.build(:sales_log, mortgageused: 1, mortgage: 10_000, staircase: 1, deposit: 5_000, value: 30_001, stairbought: 50, ownershipsch: 1, type: 30, saledate: now) }
+
+        it "does not add an error" do
+          sale_information_validator.validate_staircasing_mortgage(record)
+          expect(record.errors["mortgage"]).to be_empty
+          expect(record.errors["value"]).to be_empty
+          expect(record.errors["deposit"]).to be_empty
+          expect(record.errors["stairbought"]).to be_empty
+          expect(record.errors["cashdis"]).to be_empty
+          expect(record.errors["type"]).to be_empty
         end
       end
     end
@@ -905,6 +1066,8 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
         expect(record.errors["value"]).to be_empty
         expect(record.errors["deposit"]).to be_empty
         expect(record.errors["stairbought"]).to be_empty
+        expect(record.errors["cashdis"]).to be_empty
+        expect(record.errors["type"]).to be_empty
       end
     end
 
@@ -924,10 +1087,45 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
 
             it "adds an error" do
               sale_information_validator.validate_staircasing_mortgage(record)
-              expect(record.errors["mortgageused"]).to include("The deposit is £5,000.00 and the percentage bought times the purchase price is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["value"]).to include("The deposit is £5,000.00 and the percentage bought times the purchase price is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["deposit"]).to include("The deposit is £5,000.00 and the percentage bought times the purchase price is £8,400.00. As no mortgage was used, these figures should be the same.")
-              expect(record.errors["stairbought"]).to include("The deposit is £5,000.00 and the percentage bought times the purchase price is £8,400.00. As no mortgage was used, these figures should be the same.")
+              expect(record.errors["mortgageused"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["value"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["deposit"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["stairbought"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["type"]).to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              expect(record.errors["cashdis"]).not_to include("The deposit is £5,000.00 and the value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+            end
+
+            context "and it is a social homebuy" do
+              before do
+                record.type = 18
+                record.cashdis = "200"
+              end
+
+              it "adds an error" do
+                sale_information_validator.validate_staircasing_mortgage(record)
+                expect(record.errors["mortgageused"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["value"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["deposit"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["stairbought"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["cashdis"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+                expect(record.errors["type"]).to include("The deposit and cash discount added together is £5,200.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+              end
+            end
+
+            context "and it is not a shared ownership transaction" do
+              before do
+                record.ownershipsch = 2
+              end
+
+              it "does not add an error" do
+                sale_information_validator.validate_non_staircasing_mortgage(record)
+                expect(record.errors["mortgageused"]).to be_empty
+                expect(record.errors["value"]).to be_empty
+                expect(record.errors["deposit"]).to be_empty
+                expect(record.errors["stairbought"]).to be_empty
+                expect(record.errors["cashdis"]).to be_empty
+                expect(record.errors["type"]).to be_empty
+              end
             end
           end
 
@@ -942,6 +1140,8 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
               expect(record.errors["value"]).to be_empty
               expect(record.errors["deposit"]).to be_empty
               expect(record.errors["stairbought"]).to be_empty
+              expect(record.errors["cashdis"]).to be_empty
+              expect(record.errors["type"]).to be_empty
             end
           end
         end
@@ -955,6 +1155,22 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
             expect(record.errors["value"]).to be_empty
             expect(record.errors["deposit"]).to be_empty
             expect(record.errors["stairbought"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
+          end
+        end
+
+        context "when DEPOSIT is within 1£ tolerance of STAIRBOUGHT/100 * VALUE" do
+          let(:record) { FactoryBot.build(:sales_log, mortgageused: 2, staircase: 1, deposit: 15_000, value: 30_001, stairbought: 50, ownershipsch: 1, type: 30, saledate: now) }
+
+          it "does not add an error" do
+            sale_information_validator.validate_staircasing_mortgage(record)
+            expect(record.errors["mortgageused"]).to be_empty
+            expect(record.errors["value"]).to be_empty
+            expect(record.errors["deposit"]).to be_empty
+            expect(record.errors["stairbought"]).to be_empty
+            expect(record.errors["cashdis"]).to be_empty
+            expect(record.errors["type"]).to be_empty
           end
         end
       end
@@ -969,6 +1185,8 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
           expect(record.errors["value"]).to be_empty
           expect(record.errors["deposit"]).to be_empty
           expect(record.errors["stairbought"]).to be_empty
+          expect(record.errors["cashdis"]).to be_empty
+          expect(record.errors["type"]).to be_empty
         end
       end
     end
diff --git a/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb b/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb
index 93ab6d9da..e68e95f06 100644
--- a/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb
@@ -1134,6 +1134,32 @@ RSpec.describe BulkUpload::Sales::Year2024::RowParser do
           expect(parser.errors[:field_109]).to be_empty
         end
       end
+
+      context "with non staircasing mortgage error" do
+        let(:attributes) { setup_section_params.merge(field_9: "30", field_103: "1", field_104: "10000", field_109: "5000", field_101: "30000", field_102: "28", field_86: "2") }
+
+        it "does not add a BU error on type (because it's a setup field and would block log creation)" do
+          expect(parser.errors[:field_9]).to be_empty
+        end
+
+        it "includes errors on other related fields" do
+          expect(parser.errors[:field_104]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+          expect(parser.errors[:field_109]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+          expect(parser.errors[:field_101]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+          expect(parser.errors[:field_102]).to include("The mortgage and deposit added together is £15,000.00. The value multiplied by the percentage bought is £8,400.00. These figures should be the same.")
+        end
+
+        it "does not add errors to other ownership type fields" do
+          expect(parser.errors[:field_117]).to be_empty
+          expect(parser.errors[:field_126]).to be_empty
+          expect(parser.errors[:field_118]).to be_empty
+          expect(parser.errors[:field_127]).to be_empty
+          expect(parser.errors[:field_123]).to be_empty
+          expect(parser.errors[:field_130]).to be_empty
+          expect(parser.errors[:field_114]).to be_empty
+          expect(parser.errors[:field_125]).to be_empty
+        end
+      end
     end
 
     describe "#field_117" do