# TDSR Calculator Singapore: TDSR & MSR Loan Limits

Check your Total Debt Servicing Ratio (55%) and Mortgage Servicing Ratio (30%), and the maximum home loan and price at MAS and HDB stress-test rates.

Interactive tool: https://lookup.sg/tools/tdsr-msr-calculator

## How this works
Total Debt Servicing Ratio (TDSR): all your monthly debt repayments, including the new mortgage, can't exceed 55% of gross monthly income. Mortgage Servicing Ratio (MSR): for an HDB flat, or an executive condominium bought from the developer, the home loan instalment alone can't exceed 30% of gross monthly income. Bank loans for HDB flats and new ECs must pass both.

Lenders don't use today's rate. MAS requires banks to assess residential loans at the higher of a 4% medium-term interest rate floor or the loan's thereafter rate (since 30 September 2022). HDB assesses its own loans at a 3% floor, although borrowers pay 2.6%. The calculator finds the largest loan whose instalment at that stress rate fits under the 30% or 55% cap, then divides by the loan-to-value limit to get the maximum price.

Variable income (bonuses, commissions, allowances) is cut by 30%, using the average of the last 12 months. Loan-to-value limits are 75% for a first housing loan, 45% with one outstanding housing loan and 35% with two or more, each 20 points lower if the tenure is over 25 years (HDB flats) or 30 years (other property), or if the loan runs past age 65. HDB loans lend up to 75% and must be repaid by 65, over at most 25 years.

## FAQs
### What is the TDSR limit in Singapore?
55% of gross monthly income. All monthly debt repayments, including the new home loan, car loans and other property loans, must stay at or below 55%, assessed at a stress-test interest rate of at least 4%.

### How much can I borrow on a S$8,000 monthly income?
About S$454,700 from a bank for an HDB flat over 25 years: the 30% MSR allows a S$2,400 instalment, tested at 4%. With a 75% loan limit that supports a flat of about S$606,200. An HDB loan on the same income (tested at 3%) allows about S$506,100.

### What is the difference between TDSR and MSR?
TDSR caps all your debt repayments at 55% of income and applies to every property loan from a bank. MSR caps just the home loan instalment at 30% of income, and only applies to HDB flats and new executive condominiums bought from developers.

### Does TDSR apply to HDB loans?
No. HDB loans are assessed on the 30% Mortgage Servicing Ratio at a 3% interest rate floor. TDSR is a MAS rule for loans from banks and other financial institutions.

## Sources
- [MAS: Mortgage Servicing Ratio and Total Debt Servicing Ratio rules](https://www.mas.gov.sg/regulation/explainers/new-housing-loans/msr-and-tdsr-rules)
- [MAS: Calculating TDSR for property loans](https://www.mas.gov.sg/regulation/explainers/tdsr-for-property-loans/calculating-tdsr)
- [MAS: Loan tenure and loan-to-value limits](https://www.mas.gov.sg/regulation/explainers/new-housing-loans/loan-tenure-and-loan-to-value-limits)
- [MAS/MND/HDB: Measures to promote sustainable conditions in the property market (Sep 2022)](https://www.mas.gov.sg/news/media-releases/2022/measures-to-promote-sustainable-conditions-in-the-property-market-by-ensuring-prudent-borrowing-and-moderating-demand)
- [HDB: Credit to finance a flat purchase](https://www.hdb.gov.sg/residential/buying-a-flat/working-out-your-flat-budget/credit-to-finance-a-flat-purchase)

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Source: Lookup (https://lookup.sg) · Data as of October 2026 · Listings compiled from Singapore government open data (data.gov.sg), OneMap and Overture Maps places. Free listings never show contact details; contact details appear only on Lookup Verified listings.