diff --git a/lib/tasks/create_organisation_rent_periods.rake b/lib/tasks/create_organisation_rent_periods.rake
new file mode 100644
index 000000000..002d24513
--- /dev/null
+++ b/lib/tasks/create_organisation_rent_periods.rake
@@ -0,0 +1,11 @@
+desc "Create OrganisationRentPeriods for organisations that have none as they were previously assumed to have all"
+task create_organisation_rent_periods: :environment do
+  org_ids_with_no_associated_rent_periods = Organisation.includes(:organisation_rent_periods).group(:id).count(:organisation_rent_periods).select { |_org_id, period_count| period_count.zero? }.keys
+  org_ids_with_no_associated_rent_periods.each do |organisation_id|
+    OrganisationRentPeriod.transaction do
+      (1..11).each do |rent_period|
+        OrganisationRentPeriod.create(organisation_id:, rent_period:)
+      end
+    end
+  end
+end