HDB Affordability Calculator

How the HDB Affordability Calculator works

Every HDB flat purchase in Singapore is capped by two separate debt-servicing ratios, and your maximum loan is whichever one bites first. The Mortgage Servicing Ratio (MSR) limits your home loan repayment for this flat alone to 30% of your gross monthly income, and applies only to HDB flats and executive condominiums. The Total Debt Servicing Ratio (TDSR) is broader: it caps all your monthly debt repayments, including this home loan, at 55.00000000000001% of gross monthly income, and applies to every property purchase in Singapore regardless of type.

This is the calculator for the practical questions: will the downpayment wipe out your CPF, are you CPF rich but cash poor, and are you sitting in the awkward zone of too poor for condo but too rich for BTO grants? It also separates locked CPF from usable cash, because it's my money, just that I don't have it is a real planning constraint.

Binding constraint: MSR vs TDSR

This calculator computes the maximum loan allowed under each ratio separately, then takes the lower of the two, exactly as HDB and banks do when assessing your loan. If you have significant existing debts (car loans, credit cards, personal loans), TDSR often becomes the binding constraint even though MSR is the HDB-specific rule, because your other obligations eat into the 55% ceiling before the home loan is even added.

Both ratios are tested at an assessment rate rather than the rate you pay. HDB sizes its loan at a 3% floor even though it charges 2.6%, and banks must use a 4% stress-test rate. Your actual instalment is therefore usually a little below the cap that set the loan.

Loan-to-value and tenure limits

The maximum loan-to-value (LTV) ratio is 75% for an HDB loan and 75% for a bank loan under this calculator’s simplified first-housing-loan assumption, meaning you’ll need to fund the remaining portion through CPF Ordinary Account savings and/or cash. Loan tenure is capped at 25 years for HDB loans and 30 years for bank loans, and a longer tenure lowers your monthly instalment but increases total interest paid over the life of the loan. To see the instalment, total interest and year-by-year repayment for a specific loan, use the HDB Loan Calculator.

LTV is a cap on the loan, not a fixed split. If your CPF OA, cash and grants come to more than the minimum down payment, you can take the full loan your income supports and pay the rest up front, so the calculator's maximum price is the loan plus all your funds. That figure uses every dollar you enter, so leave out money you need for stamp duty, legal fees and renovation.

Income ceilings from 24 August 2026

To buy a BTO flat, take an HDB loan or get the CPF Housing Grant on a resale flat, a family's average gross monthly income must be at most $16,000, and a single's at most $8,000. The 2026 National Day Rally raised these from $14,000 and $7,000, and the Executive Condominium ceiling to $18,000. Above the ceiling you can still buy a resale flat, but only with a bank loan and without the CPF Housing Grant.

Enhanced Housing Grant (EHG) tiers

The EHG is a tiered grant for eligible first-timer buyers that phases out as household income rises. Families with monthly income up to $1,500 qualify for the maximum grant of $120,000, tapering down in steps to $45,000 for families earning up to $9,000 a month, above which no EHG applies. Singles face the same taper structure at half the grant amounts, from $60,000 down to $30,000 for incomes up to $4,500 a month. This calculator applies the tier matching the household income you enter, and adds any applicable CPF Housing Grant or Proximity Housing Grant on top for resale-flat first-timers.

Your HDB budget, loan, and BTO affordability in one place

Use this as your HDB budget calculator: it turns your income, savings, and existing debts into the maximum HDB housing loan you can take and the monthly instalment that comes with it — whether you’re pricing a BTO, a resale flat, or an executive condominium. Enter your numbers to see your realistic price ceiling, the CPF and cash downpayment you’ll need up front, and how much budget is left for renovation and the move itself.

This tool provides educational estimates only, not licensed financial or mortgage advice. Actual loan eligibility, grant amounts, and interest rates depend on your full credit profile, the specific flat, prevailing bank rates, and HDB’s final assessment. Consult HDB or a bank loan officer before committing to a purchase.