Use Redbrick’s TDSR Calculator To Check How Much You Can Borrow
Enter your income, loan details, and existing financial commitments to calculate your Total Debt Servicing Ratio (TDSR) instantly. This calculator is updated to follow the latest MAS guidelines, with the TDSR limit set at 55% of your gross monthly income.
How to Use This Calculator
The calculator walks you through five steps. Here’s exactly what to enter at each stage.
Step 1: Are you buying alone or with a partner?
Select whether you are purchasing the property on your own or jointly with a partner. If you select with a partner, a second set of fields will appear for your partner’s details. For joint applications, the calculator uses both incomes and ages together to determine your combined borrowing power.
Step 2: Your personal details (and your partner’s, if applicable)
- Age: Enter your current age. This affects your maximum loan tenure, which directly influences your monthly instalment and TDSR. The younger you are, the longer the tenure available to you.
- Monthly salary: Enter your gross monthly fixed salary before CPF deductions.
- Employment type: Select Salaried if you receive a fixed monthly salary from an employer. Select Non-Salaried if you are self-employed, on commission, or earn variable income. Note that banks do not count 100% of variable income – a haircut is applied, so your recognised income will be lower than your actual earnings.
Step 3: What type of property are you buying?
Choose from Private Property, HDB Flat, Executive Condominium, or Commercial Property. This matters because HDB and EC purchases are subject to an additional ratio called the Mortgage Servicing Ratio (MSR), which caps your home loan instalment at 30% of your gross income. If you select HDB or EC, the calculator will display both your TDSR and MSR results.
Step 4: Property details
- Property price: Enter the purchase price or estimated value of the property.
- Loan-to-value (LTV) %: This is the percentage of the property price you intend to borrow. The default is 75%, which is the standard maximum for most first-home buyers with no existing property loans. The calculator may automatically reduce this figure depending on your age and loan tenure, in line with MAS rules.
Step 5: Your financial commitments
Enter the total monthly repayment amount across all your existing debts. This includes personal loans, car loans, student loans, renovation loans, and any other existing home loans. Do not enter the total outstanding balance – enter the monthly repayment amount only.
A note on credit cards: Banks do not use your actual minimum payment when assessing TDSR. They apply a standardised calculation based on your total credit limit, which is typically higher than what you currently pay. If you carry credit card balances, your actual TDSR assessed by the bank may be higher than what this calculator shows.
Once all fields are filled in, your results update in real time on the right-hand panel. Tap View Report to see your full summary.
How to Interpret Your TDSR Calculator Results
The calculator displays several outputs. Here is what each one means.
TDSR % and the doughnut chart
The large circular chart shows your current TDSR as a red segment and your remaining headroom as a blue segment. The percentage shown is your TDSR — the share of your gross monthly income already committed to debt, including the new home loan you are applying for.
Remaining Ratio
This is the gap between your TDSR and the 55% cap. For example, if your TDSR is 38%, your remaining ratio is 17%. A larger remaining ratio means you have more buffer and stronger loan eligibility.
Gross Monthly Income
This reflects the income the calculator has recognised after applying any applicable haircuts. If you selected Non-Salaried, this figure will be lower than the salary you entered — that reduction is expected and mirrors how banks assess your income.
Monthly Instalment
This is your estimated home loan repayment per month, calculated using the current lowest available interest rate. Note that for pass/fail assessment, MAS requires banks to stress-test at a higher rate — so the instalment used to determine your TDSR eligibility is calculated at a higher rate than the one displayed here.
Maximum Property Price and Maximum Loan Amount
The bar chart compares your intended purchase figures against the maximum amounts you can borrow within the 55% TDSR limit. If the Maximum Loan Amount bar is shorter than your Loan Amount bar, your current income and debt profile does not support your intended loan at this time.
MSR (for HDB and EC buyers only)
If you selected HDB Flat or Executive Condominium, a second ratio will appear showing your Mortgage Servicing Ratio. This must stay at or below 30%. Even if you pass TDSR, you may be limited by MSR — and vice versa. The binding constraint is whichever ratio is more restrictive.
Understanding Your Results
If your TDSR is below 55%
You meet the current MAS threshold and are generally eligible for most property loans in Singapore. Review your Maximum Loan Amount in the bar chart to confirm it supports your intended purchase price.
If your TDSR is close to 55%
You are approaching the maximum limit. Small increases in interest rates or new debts — such as a new credit card or car loan — could push you over the threshold before your loan is approved. It is worth speaking to a mortgage advisor now to review your options before making an offer.
If your TDSR exceeds 55%
Your current income and debt profile does not meet MAS requirements for the loan amount you have entered. This does not mean you cannot buy property — it means adjustments are needed first.
Common ways to improve your TDSR include:
- Paying down or closing existing credit cards, personal loans, or car loans to reduce your monthly commitments
- Increasing your recognised income by adding a joint borrower, such as a spouse or family member
- Reducing the loan amount by increasing your cash downpayment
- Choosing a longer loan tenure if your age permits, which lowers the monthly instalment figure used in the calculation
What is TDSR?
The Total Debt Servicing Ratio (TDSR) is a regulatory framework introduced by the Monetary Authority of Singapore (MAS) in 2013 to ensure that borrowers do not take on more debt than they can service. It sets a ceiling on how much of your gross monthly income can go toward repaying all debt obligations combined — including the home loan you are applying for.
The current TDSR limit is 55%. This means your total monthly debt repayments, including the new mortgage, cannot exceed 55% of your gross monthly income as assessed by the bank. TDSR applies to all property loans in Singapore, regardless of whether you are buying an HDB flat, private property, or commercial unit.
How is TDSR Calculated?
The TDSR formula is:
TDSR (%) = Total monthly debt obligations ÷ Gross monthly income × 100
Total monthly debt obligations include the home loan instalment you are applying for, plus all existing monthly repayments — car loans, personal loans, student loans, renovation loans, and a standardised credit card obligation calculated on your total credit limit.
Gross monthly income is your recognised income after any applicable haircuts. Salaried employees generally have their full fixed income counted. Self-employed and commission-based earners have a portion of their variable income discounted under MAS rules.
Why Use Our Calculator Before Approaching Banks?
Most buyers go to banks after finding a property they want to buy. This is the wrong order. Knowing your TDSR in advance means you:
- Enter negotiations knowing exactly what loan amount you qualify for
- Avoid the disappointment of a lower-than-expected In-Principle Approval (IPA)
- Have time to restructure your debts or increase your income before applying
- Can compare how different property prices or loan amounts affect your eligibility
The few minutes it takes to run your numbers here can prevent weeks of delay later in the process.
What Affects Your TDSR Results?
Gross monthly income
Higher income directly raises the amount you can borrow, since the 55% cap is applied to your income. Joint applications combine both applicants’ recognised incomes.
Employment type
Salaried employees generally have their full fixed income counted. Self-employed and commission-based earners have a portion of their income discounted, which lowers the recognised income figure used in the TDSR calculation.
Age and loan tenure
Older applicants face shorter maximum tenures, which results in higher monthly instalments for the same loan amount. A higher instalment means a higher TDSR, even at the same property price.
Existing financial commitments
Every existing monthly debt repayment — car loans, personal loans, and credit card obligations — reduces the headroom available for a home loan. Clearing these before applying meaningfully improves your TDSR.
Property type
HDB and EC buyers are assessed under both TDSR and MSR. The more restrictive of the two ratios will determine the actual borrowing limit, which is why HDB buyers often find their maximum loan is lower than what TDSR alone would suggest.
For a full breakdown of how TDSR is calculated, read our TDSR guide.
Frequently Asked Questions (FAQ)
What is a good TDSR ratio in Singapore?
Any TDSR at or below 55% meets MAS requirements. In practice, banks prefer borrowers with meaningful headroom below the cap, as it signals a lower risk of financial stress if interest rates rise or income changes.
I’m self-employed. How does the calculator handle my income?
Select Non-Salaried under Employment Type. The calculator will apply a standard income haircut, meaning only a portion of your declared income is counted. This mirrors how banks assess variable and self-employment income under MAS rules.
Why does the calculator change my LTV percentage automatically?
MAS rules reduce the maximum LTV for borrowers where the loan tenure extends beyond certain age thresholds. If your age means the loan would run past age 65, the LTV is capped at 55%. If it would run past age 75, your borrowing capacity is significantly restricted, and lending options narrow considerably. The calculator applies these rules automatically.
Does joint application help improve my TDSR result?
Yes, significantly. Adding a co-borrower increases the combined recognised income used in the calculation, which raises the 55% income cap and therefore the maximum loan amount available.
Why are there two ratios for HDB and EC properties?
HDB flats and Executive Condominiums purchased directly from the developer are subject to the Mortgage Servicing Ratio (MSR) in addition to TDSR. MSR limits your home loan instalment to 30% of gross income, which is a tighter constraint than TDSR for most buyers. Both ratios apply simultaneously.
How accurate is this TDSR calculator?
It provides a reliable estimate based on current MAS guidelines and stress-test interest rates. The actual loan amount offered by a bank may differ slightly based on your credit history, the bank’s internal policies, and the specific property being purchased. Use this as a planning tool, then get professional advice from a mortgage advisor.
Can I get a report of my results?
Yes. After viewing your results, use the Email Me This Report button to receive a copy of your full TDSR summary, including the charts, loan figures, and personal details you entered.
Read our full TDSR Singapore Guide for a deeper breakdown of how the ratio works, how it differs from MSR, and what to do if you are close to the limit.
Get Help from a Mortgage Advisor
Redbrick mortgage advisors work with borrowers at every stage – first-time buyers, upgraders, and those looking to refinance. We can help you:
- Compare home loan packages from leading Singapore banks
- Identify the fastest path to improving your TDSR ratio
- Structure a joint application if a co-borrower would help your eligibility
- Navigate both TDSR and MSR requirements if you are buying an HDB or EC
Get a Free Mortgage Consultation
Disclaimer: The results provided by the calculator(s) assume the accuracy of the users inputs and are based on corresponding rules and regulations as set out by the relevant local authorities such as Inland Revenue Authority of Singapore (IRAS) or Monetary Authority of Singapore (MAS). Any person acting upon or in reliance of this information does so entirely at their own risk. No warranty whatsoever is given and no liability is accepted by the company behind this calculator for any loss arising directly or indirectly as a result of any action or omission made in reliance of any information presented herein at any time. Every effort has been made to ensure that the information provided is accurate. You must not rely on this information to make a financial or investment decision. Before making any decision, we recommend you consult a professional advisor to take into account your particular objectives.