TDSR Calculator Singapore 2026
Total Debt Servicing Ratio — MAS 55% Limit, Stress-Test Rate & Maximum Loan
Calculate your Total Debt Servicing Ratio (TDSR) under the MAS (Monetary Authority of Singapore) 55% framework. Enter your gross monthly income, all existing debt obligations (car loan, personal loan, credit card outstanding, other debts), and your proposed property loan to see whether you pass the TDSR limit. Includes the MAS 4% medium-term stress-test rate for variable-rate loans, 70% haircut on variable income (bonuses and commissions), 3.5% of outstanding credit card balance as deemed monthly obligation, maximum borrowing capacity at your assessed rate, and MSR cross-check for HDB and Executive Condominium buyers.
Enter your fixed gross monthly salary before CPF and income tax deductions. For joint borrowers, combine both fixed incomes. Fixed income includes basic salary, fixed allowances, and regular guaranteed payments.
Average monthly variable income (bonuses, commissions, overtime averaged over 12 months). MAS applies a 30% haircut — only 70% of variable income counts towards your TDSR income base. Leave at 0 if you have no variable income.
For variable-rate (SORA) bank loans, MAS applies the stress-test: TDSR is assessed at the higher of your actual rate or 4% (the medium-term rate). For fixed-rate and HDB loans, TDSR uses the actual rate. HDB/EC loans also trigger the MSR 30% cross-check.
Enter the total outstanding balance, not the monthly payment. MAS deems 3.5% of the outstanding balance as your monthly credit card obligation for TDSR. If your balance is S$10,000, MAS counts S$350/month.
Include any other monthly debt obligations: student loans, guarantor obligations on other loans, existing investment property mortgages, hire-purchase instalments.
Enter your income, property price, and existing debts to see your TDSR ratio, pass/fail verdict, monthly headroom or shortfall, and the maximum loan you can borrow within the 55% limit.
TDSR Singapore 2026 — The MAS 55% Total Debt Servicing Ratio Framework for Property Loans
The Total Debt Servicing Ratio (TDSR) is the Monetary Authority of Singapore’s (MAS) key affordability measure for all property loans. Since 29 June 2013, all financial institutions in Singapore must ensure that a borrower’s total monthly debt obligations do not exceed 55% of gross monthly income before granting a property loan. TDSR captures all debts — not just the mortgage, but also car loans, personal loans, credit card revolving balances, renovation loans, student loans, and any other monthly debt obligations. For HDB flat and Executive Condominium (EC) purchases, an additional MSR (Mortgage Servicing Ratio) limit of 30% applies: the new mortgage instalment alone must not exceed 30% of gross monthly income. TDSR is assessed using the MAS medium-term interest rate of 4% for variable-rate loans — meaning even if your current SORA rate is 2.8%, the bank assesses your TDSR at 4% to ensure you can service the loan if rates rise.
The TDSR Formula
| Component | Treatment | Example (S$10K income) |
|---|---|---|
| Fixed income | 100% of gross fixed salary | S$10,000 |
| Variable income | 70% of average (30% haircut) | S$2,000 × 70% = S$1,400 |
| Effective income | Fixed + 70% variable | S$11,400 |
| 55% TDSR ceiling | 55% of effective income | S$6,270/mo |
| New mortgage | At stress rate (max of actual or 4%) | e.g. S$3,200/mo |
| Car loan | Monthly instalment | e.g. S$1,500/mo |
| Credit card | 3.5% of outstanding balance | S$10K × 3.5% = S$350/mo |
| Total obligations | All debts combined | S$5,050/mo |
| TDSR ratio | Total / Effective income | 44.3% — PASS |
How This TDSR Calculator Works — Stress Testing, Variable Income & MSR Cross-Check
Step 1 — Enter Income with Variable Income Haircut
Enter your fixed gross monthly income and any variable income (bonuses, commissions, overtime averaged over 12 months). MAS applies a 30% haircut to variable income — only 70% counts. Your effective income for TDSR = fixed income + (variable income × 70%). For joint borrowers, combine both incomes.
Step 2 — Enter Property Loan with Stress-Test Rate
Enter the property price, down payment, interest rate, and tenure. For variable-rate (SORA) bank loans, the calculator applies the MAS stress-test: your TDSR is assessed at the higher of your actual loan rate or 4%. For fixed-rate packages and HDB loans, the actual rate is used. The calculator shows both the stress-test instalment (used for TDSR) and the actual instalment (what you actually pay).
Step 3 — Add All Existing Debts and See Your TDSR
Enter all existing monthly debt obligations: car loan instalment, personal or renovation loan payment, credit card outstanding balance (the calculator applies 3.5% to compute the monthly deemed obligation), and any other debts. The TDSR ratio = total obligations (new mortgage + all debts) ÷ effective income. The calculator shows pass/fail against the 55% limit, your monthly headroom or shortfall, and the maximum loan amount you could borrow within the TDSR ceiling. For HDB/EC loan types, it also runs the MSR 30% cross-check.
3 Real Singapore TDSR Examples — Single Buyer, Couple with Car Loan & HDB BTO with Bonus Income
Single Buyer, S$7K Income, Condo
Couple, S$14K + S$2K Car Loan
HDB BTO, S$5K + S$1K Bonus
3 Expert TDSR Tips — Credit Card Trap, Stress-Test Strategy & MSR Double Gate
The Credit Card Trap: Clear Outstanding Balances Before Applying
MAS counts 3.5% of your total credit card outstanding balance as a monthly debt obligation for TDSR — even if you always pay in full. This is because the bank assesses based on the bureau report balance, which reflects the statement balance as of the last reporting date. If your credit card statement shows a S$20,000 balance (because you use your card heavily and pay in full), the bank counts S$700/month as your deemed obligation — eating into your TDSR headroom. To optimise TDSR: (1) pay off all credit card balances at least one billing cycle before your loan application so the bureau report shows zero; (2) if you cannot clear the balance, provide the bank with proof of full payment (bank statements) — some banks will exercise discretion; (3) close unused credit lines, as even a zero-balance card with a high credit limit can sometimes be flagged. The 3.5% rule catches many buyers by surprise and can be the difference between passing and failing TDSR.
The 4% Stress-Test: Fixed-Rate Packages Bypass It
For variable-rate loans (SORA-pegged packages), MAS requires the bank to assess TDSR at the higher of the actual rate or 4%. If your SORA package is 2.8%, the TDSR assessment uses 4% — meaning a higher assessed instalment and a lower maximum loan. However, fixed-rate packages (where the rate is locked for the full tenure, or at least the initial period) are assessed at the actual fixed rate, not the 4% stress rate. Some borrowers choose a 3-year fixed package at 3.2% specifically to pass TDSR at 3.2% (instead of 4%), then refinance to a SORA package after the lock-in. This is a legitimate strategy but carries the risk that rates at refinancing may be higher. The difference is significant: on a S$1M loan over 25 years, the assessed instalment at 3.2% is S$4,849/month vs S$5,278 at 4% — a S$429/month TDSR difference.
The MSR Double Gate: HDB and EC Buyers Must Pass Both 30% and 55%
If you are buying an HDB flat or Executive Condominium (EC), you must pass both the MSR (30%) and TDSR (55%) tests. MSR limits the mortgage instalment alone to 30% of gross income. TDSR limits all debts to 55%. For most HDB buyers without other debts, the MSR is the binding constraint — if the mortgage passes MSR (30%), it will automatically pass TDSR (55%) since the mortgage alone is below 30%. But for HDB buyers with significant other debts (car loan + personal loan), the TDSR can become the binding constraint even when the mortgage alone is under 30%. Example: income S$8,000, mortgage S$2,200 (27.5% MSR — pass), car loan S$1,800, total obligations S$4,000 (50% TDSR — pass). But if the car loan were S$2,500, total = S$4,700 (58.8% TDSR — fail), even though MSR passes. For private property, only TDSR applies (no MSR).