Singapore Mortgage Calculator
Estimate your monthly home loan instalment, total interest cost, and a quick TDSR check for Singapore property financing.
How to use this mortgage calculator in Singapore
If you are planning to buy a condo, landed home, or HDB flat, your monthly loan commitment is one of the most important numbers to know early. This mortgage calculator SG tool helps you estimate your monthly instalment in seconds by combining your property price, down payment, interest rate, and loan tenure.
A fast estimate helps you avoid over-committing and lets you compare options before engaging banks or mortgage brokers. You can also use the optional income and debt fields to run a rough TDSR check.
What this calculator shows
- Loan amount: Property price minus down payment.
- Monthly instalment: Estimated monthly repayment using a standard amortizing loan formula.
- Total interest paid: Cumulative interest over the full tenure.
- Total amount repaid: Principal plus interest over the full loan period.
- TDSR estimate: A quick ratio using your monthly debt obligations and gross income.
- Stress-test instalment: Monthly repayment recalculated at 4% to test affordability.
Singapore-specific mortgage factors to keep in mind
1) Loan-to-Value (LTV) and down payment
Your maximum loan size depends on prevailing regulations, number of outstanding housing loans, and bank policy. If you need a higher down payment than expected, your loan amount falls, and your monthly instalment can improve significantly.
2) TDSR and MSR
In Singapore, lenders evaluate debt obligations against income. TDSR is commonly discussed for private property financing. For eligible HDB or EC purchases, MSR may also apply. Even if your calculator result looks comfortable, a bank's final assessment may differ.
3) Floating vs fixed rates
A floating package may be attractive at the start but can move with market conditions. A fixed package gives certainty for a lock-in period but might start at a higher rate. Use this calculator to test multiple rate scenarios (for example 2.8%, 3.2%, and 4.0%) so you can see how sensitive your monthly instalment is.
4) Tenure and total interest trade-off
A longer tenure lowers monthly cash outflow but increases total interest paid over time. A shorter tenure raises monthly instalments but can save a meaningful amount in total financing cost.
Example scenario
Suppose you are purchasing a property at SGD 1,000,000 with 25% down payment, a 3.2% annual interest rate, and a 25-year tenure. The estimated loan is SGD 750,000. Your monthly instalment may be around the mid-SGD 3,000 range, depending on exact assumptions. If rates rise, this number can increase quickly, so always test conservative scenarios.
Tips for first-time home buyers in SG
- Build a buffer for renovation, stamp duties, legal fees, and moving costs.
- Avoid stretching your budget to the maximum approved amount.
- Plan for interest rate changes, especially on floating packages.
- Review refinancing options after lock-in periods end.
- Keep emergency savings separate from your down payment fund.
Frequently asked questions
Is this calculator accurate?
It is accurate for a standard amortizing estimate, but real loans can include package-specific fees, lock-in clauses, repricing options, and insurance requirements.
Why does my bank quote differ?
Banks may use different assumptions, day-count conventions, package terms, and eligibility checks. Regulatory limits and your profile also affect final approval.
Should I pick the longest tenure to reduce monthly payments?
Not always. Lower monthly payments help cash flow, but longer tenure generally means paying more interest overall. Balance affordability today with total cost over time.
Final thoughts
A mortgage calculator SG tool is one of the easiest ways to become a more confident home buyer. Run several scenarios, stay conservative, and understand your comfort zone before committing. If your numbers are tight, adjusting property budget, down payment, or tenure early can save a lot of stress later.