diff --git a/src/integrations/supabase/types.ts b/src/integrations/supabase/types.ts
index 1432806..7d68dbc 100644
--- a/src/integrations/supabase/types.ts
+++ b/src/integrations/supabase/types.ts
@@ -221,6 +221,7 @@ export type Database = {
           late: number
           legal: number
           payment: number
+          sort_order: number
           transaction_type: string
           updated_at: string
           viol: number
@@ -242,6 +243,7 @@ export type Database = {
           late?: number
           legal?: number
           payment?: number
+          sort_order?: number
           transaction_type: string
           updated_at?: string
           viol?: number
@@ -263,6 +265,7 @@ export type Database = {
           late?: number
           legal?: number
           payment?: number
+          sort_order?: number
           transaction_type?: string
           updated_at?: string
           viol?: number
diff --git a/supabase/migrations/20260417015724_210748c1-113b-4c0d-883b-6a7ce98b67f7.sql b/supabase/migrations/20260417015724_210748c1-113b-4c0d-883b-6a7ce98b67f7.sql
new file mode 100644
index 0000000..b51c9df
--- /dev/null
+++ b/supabase/migrations/20260417015724_210748c1-113b-4c0d-883b-6a7ce98b67f7.sql
@@ -0,0 +1,11 @@
+ALTER TABLE public.collection_ledger_entries ADD COLUMN IF NOT EXISTS sort_order integer NOT NULL DEFAULT 0;
+CREATE INDEX IF NOT EXISTS collection_ledger_entries_collection_sort_idx ON public.collection_ledger_entries (collection_id, sort_order, entry_date, created_at);
+-- Backfill: assign sort_order based on existing chronological order
+WITH ordered AS (
+  SELECT id, ROW_NUMBER() OVER (PARTITION BY collection_id ORDER BY entry_date, created_at) * 10 AS new_order
+  FROM public.collection_ledger_entries
+)
+UPDATE public.collection_ledger_entries e
+SET sort_order = o.new_order
+FROM ordered o
+WHERE e.id = o.id AND e.sort_order = 0;
\ No newline at end of file