diff --git a/app/models/derived_variables/sales_log_variables.rb b/app/models/derived_variables/sales_log_variables.rb
index 3290a6d5a..492e0a6bc 100644
--- a/app/models/derived_variables/sales_log_variables.rb
+++ b/app/models/derived_variables/sales_log_variables.rb
@@ -40,6 +40,10 @@ module DerivedVariables::SalesLogVariables
 
     if saledate && form.start_year_after_2024? && discounted_ownership_sale?
       self.ppostcode_full = postcode_full
+      self.ppcodenk = 0 if postcode_full.present?
+      self.prevloc = la
+      self.is_previous_la_inferred = is_la_inferred
+      self.previous_la_known = la_known
     end
 
     set_encoded_derived_values!(DEPENDENCIES)
diff --git a/spec/models/sales_log_spec.rb b/spec/models/sales_log_spec.rb
index 5c19ee1d0..00792b0bd 100644
--- a/spec/models/sales_log_spec.rb
+++ b/spec/models/sales_log_spec.rb
@@ -704,11 +704,12 @@ RSpec.describe SalesLog, type: :model do
         expect(record_from_db["la"]).to eq("E06000064")
       end
 
-      it "does not set previous postcode for discounted sale" do
-        address_sales_log_23_24.update!(ownershipsch: 2, ppostcode_full: nil)
+      it "does not set previous postcode or previous la for discounted sale" do
+        address_sales_log_23_24.update!(ownershipsch: 2, ppostcode_full: nil, prevloc: nil)
         record_from_db = described_class.find(address_sales_log_23_24.id)
         expect(address_sales_log_23_24.ppostcode_full).to eq(nil)
         expect(record_from_db["ppostcode_full"]).to eq(nil)
+        expect(record_from_db["prevloc"]).to eq(nil)
       end
     end
 
@@ -719,6 +720,8 @@ RSpec.describe SalesLog, type: :model do
           created_by: created_by_user,
           ppcodenk: 1,
           postcode_full: "CA10 1AA",
+          ppostcode_full: nil,
+          prevloc: nil,
           saledate: Time.zone.local(2024, 5, 2),
         })
       end
@@ -740,6 +743,7 @@ RSpec.describe SalesLog, type: :model do
         record_from_db = described_class.find(address_sales_log_24_25.id)
         expect(address_sales_log_24_25.ppostcode_full).to eq("CA10 1AA")
         expect(record_from_db["ppostcode_full"]).to eq("CA10 1AA")
+        expect(record_from_db["prevloc"]).to eq("E06000064")
       end
 
       it "does not set previous postcode for non discounted sale" do
@@ -747,6 +751,7 @@ RSpec.describe SalesLog, type: :model do
         record_from_db = described_class.find(address_sales_log_24_25.id)
         expect(address_sales_log_24_25.ppostcode_full).to eq(nil)
         expect(record_from_db["ppostcode_full"]).to eq(nil)
+        expect(record_from_db["prevloc"]).to eq(nil)
       end
     end