What Is TDSR and How Does It Affect Your Mortgage Eligibility?
The Total Debt Servicing Ratio (TDSR) is a critical regulatory measure set by Singapore's Monetary Authority of Singapore (MAS) that determines how much you can borrow for a property loan.[1][4] Simply put, TDSR is the percentage of your gross monthly income that goes toward servicing all your debts—including your mortgage, car loans, credit cards, and any other outstanding obligations.[1] The current TDSR limit in Singapore is capped at 55% of your gross monthly income, meaning your total monthly debt repayments cannot exceed this threshold.[1][3]
Understanding TDSR is essential for anyone looking to purchase property in Singapore, whether you're a first-time homebuyer, upgrading from an HDB flat, or investing in a private property. The stricter lending rules introduced by TDSR have made it more challenging for some buyers to qualify for loans, but they also serve an important purpose: protecting borrowers from overextending themselves financially.[3] At Homejourney, we believe in empowering you with knowledge to make confident decisions about your home loan.
This guide breaks down TDSR calculations, shows you how it impacts your borrowing capacity, and provides practical strategies to improve your mortgage eligibility. We'll also show you how to use Homejourney's tools to compare bank rates and find the best loan options for your situation.
How Is TDSR Calculated in Singapore?
The TDSR formula is straightforward, but understanding what counts as "debt" and "income" is crucial for accurate calculations.[7]
The TDSR Formula:[7]
TDSR = (Total Monthly Debt Obligations ÷ Gross Monthly Income) × 100%
For example, if your gross monthly income is $5,000 and your total monthly debt obligations are $2,200, your TDSR would be 44% ($2,200 ÷ $5,000 × 100), which is within the 55% limit and would qualify you for a mortgage.
What Counts as "Total Monthly Debt Obligations"?
Your total monthly debt obligations include all recurring debt repayments:[2]
- Monthly mortgage payments on existing property loans
- Car loan installments
- Minimum monthly payments on all active credit cards (even if you pay in full)
- Personal loans and other consumer debt
- 20% of monthly repayment for loans where you're a guarantor[2]
This comprehensive approach means that even small debts like credit card minimums add up and reduce your borrowing capacity. Many first-time buyers are surprised to learn that their existing car loan or credit card balances significantly impact how much they can borrow for a property.
What Counts as "Gross Monthly Income"?
Your gross monthly income includes all sources of earnings, but variable income receives a "haircut" (reduction) of 30%.[2] This means:
- Fixed Income (100% counted): Basic salary, employment income, and fixed allowances
- Variable Income (30% haircut): Bonuses, commissions, director's fees, and rental income[2]
- Asset-Based Income: If your income is insufficient, you can convert eligible financial assets (cash, deposits, stocks, unit trusts) into income by applying haircuts of 70% (or 30% if pledged) over 48 months[2]
For joint applications, banks aggregate both borrowers' income and debt. If one borrower earns significantly more, they may be assigned a larger portion of the mortgage repayment for TDSR calculation purposes.[2]
TDSR vs. MSR: Understanding Both Limits
If you're applying for an HDB flat or Executive Condominium (EC) loan from a bank, you'll need to meet both TDSR and MSR requirements.[1] Understanding the difference is critical:
MSR (Mortgage Servicing Ratio): Capped at 30% of gross monthly income and applies only to HDB and EC loans.[1] This means your monthly mortgage payment alone cannot exceed 30% of your income.
TDSR (Total Debt Servicing Ratio): Capped at 55% of gross monthly income and applies to all property loans—HDB, EC, and private property.[1] This includes all your debts, not just the mortgage.
For HDB and EC loans from banks, you must satisfy both limits. For private property loans, only TDSR applies.[1] This is why understanding both ratios is essential for different property types in Singapore.
Real-World TDSR Calculation Examples
Let's walk through practical scenarios to show how TDSR affects your borrowing capacity:
Example 1: First-Time Buyer with No Existing Debt
Scenario: You earn $6,000 gross monthly income with no existing debts.
Maximum TDSR debt = $6,000 × 55% = $3,300 per month
Since you have no other debts, you can allocate the full $3,300 toward your mortgage payment. At a 3.5% interest rate over 25 years, this translates to approximately $650,000 in borrowing capacity (depending on the bank's specific calculations).
Example 2: Buyer with Existing Car Loan
Scenario: You earn $5,000 gross monthly income. You have a car loan with a $600 monthly payment and a credit card minimum of $100.
Total existing debt obligations = $600 + $100 = $700
Maximum TDSR debt = $5,000 × 55% = $2,750
Available for mortgage = $2,750 - $700 = $2,050 per month
Your existing debts consume 14% of your TDSR limit, leaving you with 41% for your mortgage. This reduces your borrowing capacity compared to someone with no existing debts.
Example 3: Joint Application with Variable Income
Scenario: Husband earns $8,000 basic salary + $2,000 annual bonus (variable). Wife earns $4,000 fixed salary. Combined car loan: $500/month.
Husband's income = $8,000 + ($2,000 ÷ 12 × 70%) = $8,116.67
Wife's income = $4,000
Combined gross income = $12,116.67
Maximum TDSR debt = $12,116.67 × 55% = $6,664.17
Available for mortgage = $6,664.17 - $500 = $6,164.17 per month
This joint application significantly increases borrowing capacity compared to applying individually.
How TDSR Impacts Your Mortgage Eligibility
TDSR directly determines the maximum loan amount you can secure and the property price range you can afford. Banks use TDSR as a primary screening criterion before approving your mortgage application.[1] Here's how it works:
Step 1: Calculate Your Maximum Monthly Debt Service — Multiply your gross monthly income by 55%
Step 2: Subtract Existing Debt Obligations — Deduct all current monthly debt payments
Step 3: Determine Maximum Mortgage Payment — The remaining amount is what you can allocate to your new mortgage
Step 4: Calculate Loan Amount — Banks convert this monthly payment into a loan amount based on interest rates and tenure
For example, if you can allocate $3,000/month to a mortgage at 3.5% interest over 25 years, you could borrow approximately $600,000. The actual property you can afford depends on your down payment and the current market prices in your target area.
At Homejourney, you can use our mortgage eligibility calculator to instantly determine your borrowing capacity based on your specific income and debt situation. This gives you a clear picture of your budget before you start house hunting.
TDSR Exemptions and Special Cases
While TDSR applies to all property loans, there are important exemptions to be aware of:[2]
Refinancing Exemptions
Owner-Occupied Properties: If you're refinancing an owner-occupied property, you're exempted from the TDSR limit as long as you pass the bank's credit assessment.[2] This exemption applies regardless of when you purchased the property.
Investment Properties: For investment property refinancing, you can exceed the TDSR limit if you pass credit assessment and agree to pay down a minimum of 3% of the outstanding loan over 3 years.[2] However, individual banks may have stricter internal guidelines and can decline refinancing requests even with this exemption.
These exemptions recognize that many property owners already have mortgages that exceed 55% TDSR and shouldn't be penalized when refinancing due to rising interest rates.
Strategies to Improve Your TDSR and Boost Mortgage Eligibility
If your TDSR is too high or you want to increase your borrowing capacity, consider these practical strategies:
1. Pay Down Existing Debts
The most direct way to improve your TDSR is to reduce your monthly debt obligations. Prioritize paying off credit card balances, car loans, or personal loans before applying for a mortgage. Even paying down a car loan from $600 to $300/month frees up $300 in your TDSR allowance—potentially increasing your borrowing capacity by $60,000+.
2. Increase Your Income
A higher gross monthly income directly increases your TDSR ceiling. If you're self-employed or receive variable income, ensure you have 2-3 years of consistent income documentation to maximize the income banks will recognize. Some borrowers strategically time their mortgage applications after receiving promotions or securing additional income streams.
3. Leverage Asset-Based Lending
If you have liquid assets like savings, investments, or unit trusts, banks can convert these into additional income for TDSR calculation.[2] For example, $100,000 in financial assets could add approximately $625 in monthly income (after applying the 70% haircut over 48 months). This is particularly useful for self-employed individuals or those with irregular income.
4. Apply as a Joint Applicant
If you're married or in a committed partnership, applying jointly combines both incomes and can significantly increase your borrowing capacity. A spouse's income, even if lower, adds to the combined pool and may push you above the TDSR threshold.
5. Extend Your Loan Tenure
Longer loan tenures reduce monthly payments, which improves your TDSR ratio. However, you'll pay more interest over time. The maximum tenure is the lower of 35 years (for private property) or 30 years (for HDB) minus years since the first loan disbursement, or the bank's age limit (typically 75 years) minus your income-weighted average age.[2]
Comparing Bank Rates and Loan Offers with Homejourney
Once you understand your TDSR eligibility, the next step is finding the best mortgage rate. Different banks offer different rates, and even a 0.25% difference in interest rates can save you tens of thousands of dollars over your loan tenure.
At Homejourney, we make it easy to compare rates from all major Singapore banks—DBS, OCBC, UOB, HSBC, Standard Chartered, Maybank, CIMB, RHB, and more—in one place. Our bank rates page shows you current rates, helps you calculate your exact eligibility based on your TDSR, and allows you to submit applications to multiple banks simultaneously.
Here's how to use Homejourney to optimize your mortgage:
Step 1: Calculate Your Eligibility — Use our built-in calculator to determine your maximum borrowing capacity based on your income and existing debts. This gives you a clear picture of your budget.
Step 2: Compare Bank Rates — View current rates from all major banks side-by-side. Rates change frequently, so comparing ensures you get the best deal available.
Step 3: Apply via Singpass — Submit one application through Homejourney, and your income and employment data auto-fills using Singpass, making the process faster and easier.
Step 4: Receive Multiple Offers — Banks respond with personalized offers based on your profile. You can then compare terms, rates, and conditions before deciding.
This multi-bank approach saves time and ensures you're not leaving money on the table by accepting the first offer you receive.
Common TDSR Mistakes to Avoid
Understanding what NOT to do is just as important as knowing the rules:
- Ignoring Small Debts: Credit card minimums and small loans add up. Don't assume they won't affect your TDSR.
- Overestimating Variable Income: Banks apply a 30% haircut to bonuses and commissions. Don't count on receiving these in full for TDSR purposes.
- Applying Immediately After Job Change:
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