Annual gross income (KRW): 80000000 · Annual mortgage P&I (KRW): 20000000 · Other annual loan interest (KRW): 3000000 · DTI reference limit (%): 60
Annual DTI repayment total: 23,000,000 KRWA worked example using the listed default inputs. Uses annual mortgage principal and interest plus other borrowing interest divided by annual income. Not a full bank underwriting rule.