diff --git a/app/services/bulk_upload/lettings/year2025/row_parser.rb b/app/services/bulk_upload/lettings/year2025/row_parser.rb
index f3b6e7edd..e407e9fe6 100644
--- a/app/services/bulk_upload/lettings/year2025/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2025/row_parser.rb
@@ -1035,6 +1035,14 @@ private
 
   def add_errors_for_invalid_fields
     invalid_fields.each do |field|
+      # ensure questions not routed to are not included in error report
+      error_questions_ids = field_mapping_for_errors
+                              .select { |_k, fields| fields.map(&:to_s).include?(field.to_s) }
+                              .keys
+                              .map(&:to_s)
+      error_questions = questions.select { |question| error_questions_ids.include?(question.id) }
+      next if error_questions.none? { |question| question.page.routed_to?(log, nil) }
+
       errors.delete(field) # take precedence over any other errors as this is a BU format issue
       errors.add(field, I18n.t("#{ERROR_BASE_KEY}.invalid_option", question: QUESTIONS[field.to_sym]))
     end
diff --git a/app/services/bulk_upload/lettings/year2026/row_parser.rb b/app/services/bulk_upload/lettings/year2026/row_parser.rb
index 98a38d6e7..ac366dc57 100644
--- a/app/services/bulk_upload/lettings/year2026/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2026/row_parser.rb
@@ -1113,6 +1113,14 @@ private
 
   def add_errors_for_invalid_fields
     invalid_fields.each do |field|
+      # ensure questions not routed to are not included in error report
+      error_questions_ids = field_mapping_for_errors
+                       .select { |_k, fields| fields.map(&:to_s).include?(field.to_s) }
+                       .keys
+                       .map(&:to_s)
+      error_questions = questions.select { |question| error_questions_ids.include?(question.id) }
+      next if error_questions.none? { |question| question.page.routed_to?(log, nil) }
+
       errors.delete(field) # take precedence over any other errors as this is a BU format issue
       errors.add(field, I18n.t("#{ERROR_BASE_KEY}.invalid_option", question: QUESTIONS[field.to_sym]))
     end
diff --git a/app/services/bulk_upload/sales/year2025/row_parser.rb b/app/services/bulk_upload/sales/year2025/row_parser.rb
index fac377138..2962205c4 100644
--- a/app/services/bulk_upload/sales/year2025/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2025/row_parser.rb
@@ -689,6 +689,14 @@ private
 
   def add_errors_for_invalid_fields
     invalid_fields.each do |field|
+      # ensure questions not routed to are not included in error report
+      error_questions_ids = field_mapping_for_errors
+                              .select { |_k, fields| fields.map(&:to_s).include?(field.to_s) }
+                              .keys
+                              .map(&:to_s)
+      error_questions = questions.select { |question| error_questions_ids.include?(question.id) }
+      next if error_questions.none? { |question| question.page.routed_to?(log, nil) }
+
       errors.delete(field) # take precedence over any other errors as this is a BU format issue
       errors.add(field, I18n.t("#{ERROR_BASE_KEY}.invalid_option", question: QUESTIONS[field.to_sym]))
     end
diff --git a/app/services/bulk_upload/sales/year2026/row_parser.rb b/app/services/bulk_upload/sales/year2026/row_parser.rb
index 08668d278..bd0b12c92 100644
--- a/app/services/bulk_upload/sales/year2026/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2026/row_parser.rb
@@ -750,6 +750,14 @@ private
 
   def add_errors_for_invalid_fields
     invalid_fields.each do |field|
+      # ensure questions not routed to are not included in error report
+      error_questions_ids = field_mapping_for_errors
+                              .select { |_k, fields| fields.map(&:to_s).include?(field.to_s) }
+                              .keys
+                              .map(&:to_s)
+      error_questions = questions.select { |question| error_questions_ids.include?(question.id) }
+      next if error_questions.none? { |question| question.page.routed_to?(log, nil) }
+
       errors.delete(field) # take precedence over any other errors as this is a BU format issue
       errors.add(field, I18n.t("#{ERROR_BASE_KEY}.invalid_option", question: QUESTIONS[field.to_sym]))
     end
diff --git a/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
index a62685970..113490c78 100644
--- a/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
@@ -646,9 +646,9 @@ RSpec.describe BulkUpload::Lettings::Year2025::RowParser do
         end
 
         describe "invalid fields" do
-          let(:attributes) { setup_section_params.merge({ field_45: 0 }) }
-
           context "when a field has been marked as invalid" do
+            let(:attributes) { setup_section_params.merge({ field_45: 0 }) }
+
             before do
               parser.add_invalid_field("field_45")
             end
@@ -659,6 +659,19 @@ RSpec.describe BulkUpload::Lettings::Year2025::RowParser do
               expect(parser.errors[:field_45]).to include(I18n.t("validations.lettings.2025.bulk_upload.invalid_option", question: "What is the lead tenant’s nationality?"))
             end
           end
+
+          context "when a field has been marked as invalid but it is not routed to" do
+            let(:attributes) { setup_section_params.merge({ field_117: 2 }) }
+
+            before do
+              parser.add_invalid_field("field_118")
+            end
+
+            it "does not set an error on that field" do
+              parser.valid?
+              expect(parser.errors[:field_118].size).to eq(0)
+            end
+          end
         end
       end
     end
diff --git a/spec/services/bulk_upload/lettings/year2026/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2026/row_parser_spec.rb
index b312f0b5e..665e3d683 100644
--- a/spec/services/bulk_upload/lettings/year2026/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2026/row_parser_spec.rb
@@ -538,9 +538,9 @@ RSpec.describe BulkUpload::Lettings::Year2026::RowParser do
       end
 
       describe "invalid fields" do
-        let(:attributes) { setup_section_params.merge({ field_46: 0 }) }
-
         context "when a field has been marked as invalid" do
+          let(:attributes) { setup_section_params.merge({ field_46: 0 }) }
+
           before do
             parser.add_invalid_field("field_46")
           end
@@ -551,6 +551,19 @@ RSpec.describe BulkUpload::Lettings::Year2026::RowParser do
             expect(parser.errors[:field_46]).to include(match(I18n.t("validations.lettings.2026.bulk_upload.invalid_option", question: "What is the lead tenant’s nationality?")))
           end
         end
+
+        context "when a field has been marked as invalid but it is not routed to" do
+          let(:attributes) { setup_section_params.merge({ field_135: 2 }) }
+
+          before do
+            parser.add_invalid_field("field_136")
+          end
+
+          it "does not set an error on that field" do
+            parser.valid?
+            expect(parser.errors[:field_136].size).to eq(0)
+          end
+        end
       end
     end
 
diff --git a/spec/services/bulk_upload/sales/year2025/row_parser_spec.rb b/spec/services/bulk_upload/sales/year2025/row_parser_spec.rb
index 67f5c6116..99f0774fc 100644
--- a/spec/services/bulk_upload/sales/year2025/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2025/row_parser_spec.rb
@@ -338,9 +338,10 @@ RSpec.describe BulkUpload::Sales::Year2025::RowParser do
         end
 
         describe "invalid fields" do
-          let(:attributes) { setup_section_params.merge({ field_31: 0 }) }
-
           context "when a field has been marked as invalid" do
+            # field_34 nationality is only shown if field_10 staircasing is no
+            let(:attributes) { setup_section_params.merge({ field_10: 2, field_31: 0 }) }
+
             before do
               parser.add_invalid_field("field_31")
             end
@@ -351,6 +352,19 @@ RSpec.describe BulkUpload::Sales::Year2025::RowParser do
               expect(parser.errors[:field_31]).to include(match(I18n.t("validations.sales.2025.bulk_upload.invalid_option", question: "What is buyer 1’s nationality?")))
             end
           end
+
+          context "when a field has been marked as invalid but it is not routed to" do
+            let(:attributes) { setup_section_params.merge({ field_10: 1, field_31: 0 }) }
+
+            before do
+              parser.add_invalid_field("field_31")
+            end
+
+            it "does not set an error on that field" do
+              parser.valid?
+              expect(parser.errors[:field_31].size).to eq(0)
+            end
+          end
         end
       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 91edf5c5e..f38ed5580 100644
--- a/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb
+++ b/spec/services/bulk_upload/sales/year2026/row_parser_spec.rb
@@ -344,9 +344,10 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
         end
 
         describe "invalid fields" do
-          let(:attributes) { setup_section_params.merge({ field_34: 0 }) }
-
           context "when a field has been marked as invalid" do
+            # field_34 nationality is only shown if field_10 staircasing is no
+            let(:attributes) { setup_section_params.merge({ field_10: 2, field_34: 0 }) }
+
             before do
               parser.add_invalid_field("field_34")
             end
@@ -357,6 +358,19 @@ RSpec.describe BulkUpload::Sales::Year2026::RowParser do
               expect(parser.errors[:field_34]).to include(match(I18n.t("validations.sales.2026.bulk_upload.invalid_option", question: "What is buyer 1's nationality?")))
             end
           end
+
+          context "when a field has been marked as invalid but it is not routed to" do
+            let(:attributes) { setup_section_params.merge({ field_10: 1, field_34: 0 }) }
+
+            before do
+              parser.add_invalid_field("field_34")
+            end
+
+            it "does not set an error on that field" do
+              parser.valid?
+              expect(parser.errors[:field_34].size).to eq(0)
+            end
+          end
         end
       end
     end