diff --git a/app/services/bulk_upload/sales/year2023/row_parser.rb b/app/services/bulk_upload/sales/year2023/row_parser.rb
index 506bc7456..158efec57 100644
--- a/app/services/bulk_upload/sales/year2023/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2023/row_parser.rb
@@ -754,7 +754,7 @@ private
       stairbought: %i[field_88],
       stairowned: %i[field_89],
       socprevten: %i[field_102],
-      mortgageused: %i[field_105 field_119 field_128],
+      mortgageused: [mortgageused_field],
       soctenant: %i[field_99],
 
       uprn: %i[field_19],
@@ -1103,6 +1103,12 @@ private
     return field_128 if outright_sale?
   end
 
+  def mortgageused_field
+    return :field_105 if shared_ownership?
+    return :field_119 if discounted_ownership?
+    return :field_128 if outright_sale?
+  end
+
   def owning_organisation
     @owning_organisation ||= Organisation.find_by_id_on_multiple_fields(field_1)
   end
diff --git a/app/services/bulk_upload/sales/year2024/row_parser.rb b/app/services/bulk_upload/sales/year2024/row_parser.rb
index 7a1481300..682464331 100644
--- a/app/services/bulk_upload/sales/year2024/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2024/row_parser.rb
@@ -760,7 +760,7 @@ private
       stairbought: %i[field_87],
       stairowned: %i[field_88],
       socprevten: %i[field_100],
-      mortgageused: %i[field_103 field_117 field_126],
+      mortgageused: [mortgageused_field],
 
       uprn: %i[field_22],
       address_line1: %i[field_23],
@@ -1116,6 +1116,12 @@ 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?
+  end
+
   def owning_organisation
     @owning_organisation ||= Organisation.find_by_id_on_multiple_fields(field_1)
   end
diff --git a/spec/services/bulk_upload/sales/year2023/row_parser_spec.rb b/spec/services/bulk_upload/sales/year2023/row_parser_spec.rb
index 7fde3c99e..bca7ed817 100644
--- a/spec/services/bulk_upload/sales/year2023/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2023/row_parser_spec.rb
@@ -981,6 +981,18 @@ RSpec.describe BulkUpload::Sales::Year2023::RowParser do
       end
     end
 
+    describe "#field_119" do
+      context "when validate_discounted_ownership_value is triggered" do
+        let(:attributes) { setup_section_params.merge(field_116: 100, field_125: 100, field_7: 2, field_9: 9, field_119: 2, field_118: 10) }
+
+        it "only adds errors to the discounted ownership field" do
+          expect(parser.errors[:field_105]).to be_empty
+          expect(parser.errors[:field_119]).to include("Mortgage, deposit, and grant total must equal £90.00. Your given mortgage, deposit and grant total is £100.00")
+          expect(parser.errors[:field_128]).to be_empty
+        end
+      end
+    end
+
     describe "soft validations" do
       context "when soft validation is triggered" do
         let(:attributes) { valid_attributes.merge({ field_30: 22, field_35: 5 }) }
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 ce81300b5..df6ed7764 100644
--- a/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2024/row_parser_spec.rb
@@ -1038,6 +1038,18 @@ RSpec.describe BulkUpload::Sales::Year2024::RowParser do
       end
     end
 
+    describe "#field_117" do
+      context "when validate_discounted_ownership_value is triggered" do
+        let(:attributes) { setup_section_params.merge(field_114: 100, field_123: 100, field_8: 2, field_10: 9, field_117: 2, field_116: 10) }
+
+        it "only adds errors to the discounted ownership field" do
+          expect(parser.errors[:field_103]).to be_empty
+          expect(parser.errors[:field_117]).to include("The mortgage, deposit, and grant when added together is £100.00, and the purchase purchase price times by the discount is £90.00. These figures should be the same")
+          expect(parser.errors[:field_126]).to be_empty
+        end
+      end
+    end
+
     describe "soft validations" do
       context "when soft validation is triggered" do
         let(:attributes) { valid_attributes.merge({ field_31: 22, field_35: 5 }) }