diff --git a/migrations/0005_site_settings_tariff_labels.sql b/migrations/0005_site_settings_tariff_labels.sql
new file mode 100644
index 0000000..4f38c20
--- /dev/null
+++ b/migrations/0005_site_settings_tariff_labels.sql
@@ -0,0 +1,21 @@
+-- Migration 0005: site_settings_tariff_category_labels sub-table
+-- Added when tariffCategoryLabels array field was added to SiteSettings global
+
+CREATE TABLE IF NOT EXISTS "site_settings_tariff_category_labels" (
+  "_order" integer NOT NULL,
+  "_parent_id" integer NOT NULL,
+  "id" varchar PRIMARY KEY NOT NULL,
+  "key" varchar NOT NULL,
+  "label" varchar NOT NULL
+);
+
+DO $$ BEGIN
+  ALTER TABLE "site_settings_tariff_category_labels" ADD CONSTRAINT "site_settings_tariff_category_labels_parent_id_fk"
+    FOREIGN KEY ("_parent_id") REFERENCES "public"."site_settings"("id") ON DELETE cascade ON UPDATE no action;
+EXCEPTION WHEN duplicate_object THEN null; END $$;
+
+CREATE INDEX IF NOT EXISTS "site_settings_tariff_category_labels_order_idx"
+  ON "site_settings_tariff_category_labels" USING btree ("_order");
+
+CREATE INDEX IF NOT EXISTS "site_settings_tariff_category_labels_parent_id_idx"
+  ON "site_settings_tariff_category_labels" USING btree ("_parent_id");