diff --git a/app/services/bulk_upload/lettings/row_parser.rb b/app/services/bulk_upload/lettings/row_parser.rb
index ab8280058..cee5fa319 100644
--- a/app/services/bulk_upload/lettings/row_parser.rb
+++ b/app/services/bulk_upload/lettings/row_parser.rb
@@ -148,6 +148,7 @@ class BulkUpload::Lettings::RowParser
   validate :validate_relevant_collection_window
   validate :validate_la_with_local_housing_referral
   validate :validate_cannot_be_la_referral_if_general_needs
+  validate :leaving_reason_for_renewal
 
   def valid?
     errors.clear
@@ -182,6 +183,12 @@ private
     end
   end
 
+  def leaving_reason_for_renewal
+    if field_134 == 1 && ![40, 42].include?(field_52)
+      errors.add(:field_52, I18n.t("validations.household.reason.renewal_reason_needed"))
+    end
+  end
+
   def validate_relevant_collection_window
     return unless start_date && bulk_upload.form
 
diff --git a/config/locales/en.yml b/config/locales/en.yml
index f2e980cee..a97863c30 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -376,6 +376,7 @@ en:
         male_refuge: "Answer cannot be ‘male’ as you told us their housing situation immediately before this letting was a refuge"
       reason:
         not_internal_transfer: "Answer cannot be ‘permanently decanted from another property owned by this landlord’ as you told us the source of referral for this tenancy was not an internal transfer"
+        renewal_reason_needed: 'The reason for leaving must be "End of assured shorthold tenancy - no fault" or "End of fixed term tenancy - no fault" if the letting is a renewal'
       condition_effects:
         no_choices: "You cannot answer this question as you told us nobody in the household has a physical or mental health condition (or other illness) expected to last 12 months or more"
       postcode:
diff --git a/spec/services/bulk_upload/lettings/row_parser_spec.rb b/spec/services/bulk_upload/lettings/row_parser_spec.rb
index 85438f4b1..297b9fd46 100644
--- a/spec/services/bulk_upload/lettings/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/row_parser_spec.rb
@@ -250,6 +250,34 @@ RSpec.describe BulkUpload::Lettings::RowParser do
       end
     end
 
+    describe "#field_52" do # leaving reason
+      context "when field_134 is 1 meaning it is a renewal" do
+        context "when field_52 is 40" do
+          let(:attributes) { { bulk_upload:, field_52: "40", field_134: "1" } }
+
+          it "is permitted" do
+            expect(parser.errors[:field_52]).to be_blank
+          end
+        end
+
+        context "when field_52 is 42" do
+          let(:attributes) { { bulk_upload:, field_52: "42", field_134: "1" } }
+
+          it "is permitted" do
+            expect(parser.errors[:field_52]).to be_blank
+          end
+        end
+
+        context "when field_52 is not 40 or 42" do
+          let(:attributes) { { bulk_upload:, field_52: "1", field_134: "1" } }
+
+          it "is not permitted" do
+            expect(parser.errors[:field_52]).to be_present
+          end
+        end
+      end
+    end
+
     describe "#field_78" do # referral
       context "when 3 ie PRP nominated by LA and owning org is LA" do
         let(:attributes) { { bulk_upload:, field_78: "3", field_111: owning_org.old_visible_id } }