diff --git a/app/services/bulk_upload/sales/year2026/row_parser.rb b/app/services/bulk_upload/sales/year2026/row_parser.rb
index c686fee44..bdb4f5282 100644
--- a/app/services/bulk_upload/sales/year2026/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2026/row_parser.rb
@@ -152,7 +152,7 @@ class BulkUpload::Sales::Year2026::RowParser
   }.freeze
 
   ERROR_BASE_KEY = "validations.sales.2026.bulk_upload".freeze
-  SERVICE_CHARGE_FORMAT = /\A(\d+(\.\d+)?|R)\z/i
+  NUMBER_OR_R_FORMAT = /\A(\d+(\.\d+)?|R)\z/i
 
   CASE_INSENSITIVE_FIELDS = [
     :field_29, # Age of buyer 1
@@ -1269,25 +1269,25 @@ private
   end
 
   def has_mscharge_value
-    return unless mscharge.present? && mscharge.match?(SERVICE_CHARGE_FORMAT)
+    return unless mscharge.present? && mscharge.match?(NUMBER_OR_R_FORMAT)
 
     mscharge.casecmp?("R") ? 0 : 1
   end
 
   def mscharge_value
-    return unless mscharge.present? && mscharge.match?(SERVICE_CHARGE_FORMAT) && !mscharge.casecmp?("R")
+    return unless mscharge.present? && mscharge.match?(NUMBER_OR_R_FORMAT) && !mscharge.casecmp?("R")
 
     mscharge.to_d
   end
 
   def hasservicechargeschanged_value
-    return unless field_126.present? && field_126.match?(SERVICE_CHARGE_FORMAT)
+    return unless field_126.present? && field_126.match?(NUMBER_OR_R_FORMAT)
 
     field_126.casecmp?("R") ? 2 : 1
   end
 
   def newservicecharges_value
-    return unless field_126.present? && field_126.match?(SERVICE_CHARGE_FORMAT) && !field_126.casecmp?("R")
+    return unless field_126.present? && field_126.match?(NUMBER_OR_R_FORMAT) && !field_126.casecmp?("R")
 
     field_126.to_d
   end
@@ -1424,21 +1424,21 @@ private
   def validate_service_charge_fields
     message = I18n.t("#{ERROR_BASE_KEY}.mscharge.invalid")
 
-    if shared_ownership_initial_purchase? && field_107.present? && !field_107.match?(SERVICE_CHARGE_FORMAT)
+    if shared_ownership_initial_purchase? && field_107.present? && !field_107.match?(NUMBER_OR_R_FORMAT)
       errors.add(:field_107, message)
     end
 
     if staircasing?
-      if field_125.present? && !field_125.match?(SERVICE_CHARGE_FORMAT)
+      if field_125.present? && !field_125.match?(NUMBER_OR_R_FORMAT)
         errors.add(:field_125, message)
       end
 
-      if field_126.present? && !field_126.match?(SERVICE_CHARGE_FORMAT)
+      if field_126.present? && !field_126.match?(NUMBER_OR_R_FORMAT)
         errors.add(:field_126, I18n.t("#{ERROR_BASE_KEY}.newservicecharges.invalid"))
       end
     end
 
-    if discounted_ownership? && field_136.present? && !field_136.match?(SERVICE_CHARGE_FORMAT)
+    if discounted_ownership? && field_136.present? && !field_136.match?(NUMBER_OR_R_FORMAT)
       errors.add(:field_136, message)
     end
   end
diff --git a/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb b/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb
index 4a81c12d8..4aaa0a707 100644
--- a/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb
@@ -2056,6 +2056,12 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when blank" do
           let(:attributes) { valid_attributes.merge(field_10: "2", field_107: nil) }
 
+          it "does not add a bulk upload format validation error but adds a site validation error" do
+            parser.valid?
+            expect(parser.errors[:field_107]).not_to include(I18n.t("validations.sales.2026.bulk_upload.mscharge.invalid"))
+            expect(parser.errors[:field_107]).to include("You must answer property service charges.")
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2066,6 +2072,11 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when negative" do
           let(:attributes) { valid_attributes.merge(field_10: "2", field_107: "-100") }
 
+          it "adds a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_107]).to include(I18n.t("validations.sales.2026.bulk_upload.mscharge.invalid"))
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2185,6 +2196,12 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when blank" do
           let(:attributes) { valid_attributes.merge(field_125: nil) }
 
+          it "does not add a bulk upload format validation error but adds a site validation error" do
+            parser.valid?
+            expect(parser.errors[:field_125]).not_to include(I18n.t("validations.sales.2026.bulk_upload.mscharge.invalid"))
+            expect(parser.errors[:field_125]).to include("You must answer property service charges.")
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2195,6 +2212,11 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when negative" do
           let(:attributes) { valid_attributes.merge(field_125: "-100") }
 
+          it "adds a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_125]).to include(I18n.t("validations.sales.2026.bulk_upload.mscharge.invalid"))
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2312,6 +2334,11 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when blank" do
           let(:attributes) { valid_attributes.merge(field_8: "2", field_136: nil) }
 
+          it "does not add a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_136]).to be_blank
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2322,6 +2349,11 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when negative" do
           let(:attributes) { valid_attributes.merge(field_8: "2", field_136: "-100") }
 
+          it "adds a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_136]).to include(I18n.t("validations.sales.2026.bulk_upload.mscharge.invalid"))
+          end
+
           it "does not set has_mscharge or mscharge" do
             log = parser.log
             expect(log["has_mscharge"]).to be_nil
@@ -2349,6 +2381,26 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when set to 0" do
           let(:attributes) { valid_attributes.merge(field_126: "0") }
 
+          it "does not add a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).to be_blank
+          end
+
+          it "sets hasservicechargeschanged to yes and newservicecharges to 0" do
+            log = parser.log
+            expect(log["hasservicechargeschanged"]).to eq(1)
+            expect(log["newservicecharges"]).to eq(0)
+          end
+        end
+
+        context "when set to 0.0" do
+          let(:attributes) { valid_attributes.merge(field_126: "0.0") }
+
+          it "does not add a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).to be_blank
+          end
+
           it "sets hasservicechargeschanged to yes and newservicecharges to 0" do
             log = parser.log
             expect(log["hasservicechargeschanged"]).to eq(1)
@@ -2359,6 +2411,26 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when set to R" do
           let(:attributes) { valid_attributes.merge(field_126: "R") }
 
+          it "does not add a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).to be_blank
+          end
+
+          it "sets hasservicechargeschanged to no and does not set newservicecharges" do
+            log = parser.log
+            expect(log["hasservicechargeschanged"]).to eq(2)
+            expect(log["newservicecharges"]).to be_nil
+          end
+        end
+
+        context "when set to lowercase r" do
+          let(:attributes) { valid_attributes.merge(field_126: "r") }
+
+          it "does not add a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).to be_blank
+          end
+
           it "sets hasservicechargeschanged to no and does not set newservicecharges" do
             log = parser.log
             expect(log["hasservicechargeschanged"]).to eq(2)
@@ -2384,6 +2456,12 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when blank" do
           let(:attributes) { valid_attributes.merge(field_126: nil) }
 
+          it "does not add a bulk upload format validation error but adds a site validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).not_to include(I18n.t("validations.sales.2026.bulk_upload.newservicecharges.invalid"))
+            expect(parser.errors[:field_126]).to include("You must answer service charge will change.")
+          end
+
           it "does not set hasservicechargeschanged or newservicecharges" do
             log = parser.log
             expect(log["hasservicechargeschanged"]).to be_nil
@@ -2394,6 +2472,11 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         context "when negative" do
           let(:attributes) { valid_attributes.merge(field_126: "-150") }
 
+          it "adds a validation error" do
+            parser.valid?
+            expect(parser.errors[:field_126]).to include(I18n.t("validations.sales.2026.bulk_upload.newservicecharges.invalid"))
+          end
+
           it "does not set hasservicechargeschanged or newservicecharges" do
             log = parser.log
             expect(log["hasservicechargeschanged"]).to be_nil