Before any bank in Singapore approves a home loan, it checks your Total Debt Servicing Ratio. The rule from the Monetary Authority of Singapore is simple in principle: all your monthly debt repayments combined cannot exceed 55% of your gross monthly income. This calculator works out that 55% ceiling and then subtracts the loans you already service to reveal how much monthly capacity is left for a new mortgage.
Enter your gross monthly income and the total of your existing debt obligations — car loans, personal loans, credit-card minimums and any other property instalments — and the result updates instantly. The remaining figure is the largest new monthly instalment you can realistically take on. To turn that into a property price, continue to our affordability calculator, which factors in loan tenure, interest rate and your downpayment.
Include car loans, personal loans, credit-card minimums, student loans and other property loan instalments.
TDSR ceiling (55% of income)
$5,500
per month
Remaining capacity for new debt
$4,000
available per month for a new loan instalment
Estimate only. Banks compute TDSR using a stress-test interest rate (currently a 4% medium-term floor for residential property) and may apply haircuts to variable income such as bonuses and rental. Your actual approved loan can differ. Figures are for guidance, not a loan offer.
The Total Debt Servicing Ratio (TDSR) is a Monetary Authority of Singapore rule that caps your total monthly debt repayments at 55% of your gross monthly income. It applies across all your loans — home loans, car loans, personal loans and credit-card balances — to ensure borrowing stays within sustainable limits.
Multiply your gross monthly income by 55% to get your TDSR ceiling. Subtract your existing monthly debt obligations from that ceiling, and the remainder is the maximum monthly instalment you can take on for a new home loan. If existing debts already exceed the ceiling, you have no remaining capacity.
Banks include all monthly debt commitments: existing mortgage instalments, car loans, student loans, personal loans, renovation loans and the minimum monthly repayment on credit cards. Guarantor obligations may also be counted. Recurring expenses like insurance premiums are generally not included.
No. Banks stress-test your TDSR using a medium-term interest rate floor — currently around 4% for residential property — rather than the lower promotional rate you may actually be offered. This is why the loan amount a bank approves can be smaller than a calculation at today's market rate would suggest.
No. TDSR (55%) applies to most property purchases. The Mortgage Servicing Ratio (MSR) is a separate, stricter cap of 30% of gross monthly income that applies only to HDB flats and Executive Condominiums bought directly from a developer. Where MSR applies, both limits must be satisfied.