diff --git a/backend/src/features/ownership-costs/migrations/003_alter_ownership_costs_schema.sql b/backend/src/features/ownership-costs/migrations/003_alter_ownership_costs_schema.sql
deleted file mode 100644
index 9ce49c5..0000000
--- a/backend/src/features/ownership-costs/migrations/003_alter_ownership_costs_schema.sql
+++ /dev/null
@@ -1,33 +0,0 @@
--- Migration: Alter ownership_costs table to match updated schema
--- Issue: #29
--- Description: Fix schema mismatch - rename columns, add notes, update constraints
-
--- Rename columns to match code expectations
-ALTER TABLE ownership_costs RENAME COLUMN start_date TO period_start;
-ALTER TABLE ownership_costs RENAME COLUMN end_date TO period_end;
-
--- Make period_start nullable (was NOT NULL as start_date)
-ALTER TABLE ownership_costs ALTER COLUMN period_start DROP NOT NULL;
-
--- Drop interval column (no longer used in new schema)
-ALTER TABLE ownership_costs DROP COLUMN IF EXISTS interval;
-
--- Add notes column
-ALTER TABLE ownership_costs ADD COLUMN IF NOT EXISTS notes TEXT;
-
--- Update description column type to match new schema
-ALTER TABLE ownership_costs ALTER COLUMN description TYPE VARCHAR(200);
-
--- Drop old check constraints
-ALTER TABLE ownership_costs DROP CONSTRAINT IF EXISTS chk_ownership_costs_type;
-ALTER TABLE ownership_costs DROP CONSTRAINT IF EXISTS chk_ownership_costs_amount_non_negative;
-ALTER TABLE ownership_costs DROP CONSTRAINT IF EXISTS chk_ownership_costs_date_range;
-ALTER TABLE ownership_costs DROP CONSTRAINT IF EXISTS chk_ownership_costs_interval;
-
--- Update cost_type column to VARCHAR(32) and add new constraint with additional types
-ALTER TABLE ownership_costs ALTER COLUMN cost_type TYPE VARCHAR(32);
-ALTER TABLE ownership_costs ADD CONSTRAINT ownership_costs_cost_type_check
-  CHECK (cost_type IN ('insurance', 'registration', 'tax', 'inspection', 'parking', 'other'));
-
--- Add amount constraint (amount > 0)
-ALTER TABLE ownership_costs ADD CONSTRAINT ownership_costs_amount_check CHECK (amount > 0);