Mortgage Servicing Ratio (MSR) in Singapore: 5 Mistakes to Avoid
MSR caps the instalment on HDB flats and ECs bought from developers at 30% of gross monthly income. The maths is not complicated, but a handful of errors come up again and again in this and related property & hdb calculations. Here is what to watch for.
Most Singaporeans live in HDB flats, which can be financed with an HDB concessionary loan at 0.1% above the CPF Ordinary Account rate or with a bank loan. Private property must be financed with a bank loan, and banks offer fixed, floating and SORA-pegged packages.
The Total Debt Servicing Ratio limits monthly debt repayments to 55% of gross monthly income for any property loan, and the Mortgage Servicing Ratio limits the housing instalment to 30% of income for HDB flats and new executive condominiums. Banks apply a medium-term interest rate in these tests rather than the rate you will actually pay.
1. Forgetting ABSD on a second property
Citizens pay 20% ABSD on a second residential property, which can be hundreds of thousands of dollars.
2. Assuming the bank will lend 75%
LTV falls to 45% for a second loan and is reduced further for long tenures or older borrowers.
3. Ignoring SSD when selling early
Selling within four years of buying (for purchases from 4 July 2025) attracts Seller's Stamp Duty.
4. Forgetting the cash portion
Part of the downpayment must be in cash, and CPF cannot be used for it.
5. Overlooking other costs
Legal fees, valuation, fire insurance, renovation and agent fees all add to the total outlay.
The correct method
Maximum instalment = 30% × gross monthly income.
For example, with these inputs:
- Gross monthly household income (S$): 9,000
the calculator returns:
- Maximum monthly instalment (30%): S$2,700.00
Related calculations
- Rental Yield Calculator: Measures the return from rent before and after costs such as property tax, maintenance fees and agent fees.
- Home Loan Refinancing Calculator: Compares your current mortgage with a new rate to show the monthly saving and how long switching costs take to recover.
- Property Downpayment Calculator: Splits the downpayment into cash and CPF and shows the remaining loan.
- Buyer's Stamp Duty (BSD) Calculator: Calculates Buyer's Stamp Duty on a Singapore residential property using the tiered rates from 1% to 6%.
The Mortgage Servicing Ratio (MSR) Calculator applies the formula consistently, so it is a quick way to double-check your own working.
Run your own numbers: Mortgage Servicing Ratio (MSR) Calculator