TDSR — 55% Cap
Total monthly debt repayments (mortgage at the 4% stress rate plus all other loans) cannot exceed 55% of your gross monthly income. Variable income is haircut to 70%. Self-employed applicants face the same haircut on declared income.
Home Loan Affordability Calculator Singapore
Know your exact borrowing limit before you place an OTP. This free tool runs the MAS 4% stress test, applies the 30% MSR cap for HDB, and 70% haircut on variable income — the same maths every Singapore bank uses to assess your home loan.
Your Profile
All fields update the result live. Nothing is stored or sent.
Property Type
Applicant 1
Basic salary, allowances
Bonus, commission — 70% counted
Used for IWAA tenure cap
Car, personal, student loans
3% of total card limits is treated as monthly debt under MAS rules.
The Numbers Behind The Tool
How Singapore Banks Decide How Much You Can Borrow
Three MAS rules govern every home loan in Singapore. The lower of the three caps wins — and that's usually the surprise.
MSR — 30% Cap
For HDB flats and Executive Condominiums, the new mortgage payment alone cannot exceed 30% of gross income. This rule is stricter than TDSR for most buyers and usually decides the loan size.
Tenure Cap (IWAA)
HDB tenure caps at 25 years; private at 30 years. Banks also cap tenure at age 65 (HDB) or 75 (private) using Income-Weighted Average Age across joint borrowers, which can shorten the loan term and reduce your maximum loan.
Worked Example
A Single Applicant Buying an HDB Resale
Mr. Tan, 38, earns S$7,500 fixed plus S$2,000 variable monthly. He has a S$450/month car loan and S$30,000 in card limits. For an HDB resale flat, he wants to know his maximum bank loan.
- Stress income: S$7,500 + (70% × S$2,000) = S$8,900/mo
- Card debt: 3% × S$30,000 = S$900/mo
- TDSR room: 55% × 8,900 − 450 − 900 = S$3,545/mo
- MSR room: 30% × 8,900 = S$2,670/mo (tighter)
- At 4% stress, 25-year tenure → max loan ≈ S$505,000
Notice the card limits silently knock S$900/month off TDSR — even with zero balance. We frequently see buyers cancel cards before applying to recover S$60–80k of borrowing power.
Common Questions
Affordability FAQ
TDSR (Total Debt Servicing Ratio) is a MAS rule that caps total monthly debt repayments — including the new mortgage stress-tested at 4% p.a. — at 55% of your gross monthly income. It applies to both HDB and private property purchases.
MSR (Mortgage Servicing Ratio) is an additional cap of 30% of gross income that applies only to HDB flats and Executive Condominiums. It's calculated alongside TDSR, and the lower of the two limits determines your maximum loan.
Banks haircut variable and self-employed income to 70% of the declared figure under MAS guidelines. Bonuses, commissions, rental income, and freelance income are all treated as variable. Fixed salary is used at 100%.
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