If you're buying a home in Singapore, your monthly mortgage is usually the single largest expense in your budget. This page gives you a practical mortgage calculator for Singapore and a complete guide to understanding your repayment, loan limits, and common property financing rules.
Singapore Mortgage Calculator
Estimate your monthly repayment based on property price, down payment, interest rate, and tenure.
Estimates only. Actual bank packages, stress-test rates, and regulatory rules may vary by profile and property type.
How this mortgage calculator works
This calculator uses the standard amortization formula most lenders apply. Your monthly payment is determined by:
- Loan amount (property price minus your down payment)
- Interest rate (annual rate converted to monthly)
- Loan tenure (total number of monthly payments)
For a fixed monthly payment mortgage, each instalment includes both principal and interest. In earlier years, a larger share goes to interest; later, more goes to principal.
Mortgage basics for Singapore buyers
1) Loan-to-Value (LTV)
For many bank loans, the maximum LTV is often up to 75% for your first housing loan (subject to eligibility and rules). That generally means a minimum 25% down payment, with at least part paid in cash. If you have existing housing loans, your LTV cap may be lower.
2) TDSR and affordability
The Total Debt Servicing Ratio (TDSR) framework is a key affordability check. A common benchmark is that total monthly debt obligations should not exceed a percentage of gross monthly income. This tool gives a quick affordability indicator by comparing mortgage payment versus income input.
3) MSR for certain properties
If you are buying an HDB flat or Executive Condominium (EC), the Mortgage Servicing Ratio (MSR) may also apply. MSR specifically caps the housing instalment-to-income ratio and can be stricter than general affordability checks.
4) Stamp duties and upfront costs
Besides down payment, plan for Buyer’s Stamp Duty (BSD), legal fees, valuation fees, insurance, and potential renovation costs. This calculator includes an estimated BSD for quick budgeting.
What affects your monthly repayment most?
- Interest rate changes: A 1% increase can add hundreds of dollars each month.
- Loan tenure: Longer tenure lowers monthly payment but increases total interest.
- Down payment size: A larger down payment reduces both monthly instalment and lifetime interest.
- Property price: Even small percentage differences in price can materially affect repayment.
Example scenario
Imagine a S$1,000,000 property with a 25% down payment, 3.2% interest, and 25-year tenure:
- Estimated loan amount: S$750,000
- Monthly instalment: roughly in the mid-S$3,000 range
- Total interest over full tenure: substantial, often several hundred thousand dollars
This is why rate shopping and refinancing can matter. Even a modest drop in effective rate can produce meaningful savings over time.
Fixed vs floating rates in Singapore
Fixed rate packages
Provide certainty during the lock-in period. You know your monthly instalment, which helps with household cashflow planning.
Floating rate packages
Commonly tied to market benchmarks (for example, SORA-based structures). They may start lower than fixed rates but can rise when market rates move up.
Choosing between them
- If you prioritize stability and predictable payments, fixed may suit you.
- If you can handle interest-rate volatility and want flexibility, floating may be attractive.
- Always compare lock-in terms, repricing options, and penalty clauses.
Practical tips before committing
- Stress-test your budget at rates 1% to 2% above current levels.
- Keep an emergency fund (ideally several months of expenses).
- Do not ignore recurring ownership costs: conservancy/maintenance, property tax, insurance, and repairs.
- Review total cost of borrowing, not just promotional rates.
- Check prepayment and lock-in penalties before signing any package.
Frequently asked questions
Can I pay off my mortgage early?
Usually yes, but some packages impose partial/full prepayment penalties during lock-in periods. Confirm terms in your Letter of Offer.
Should I choose the longest tenure possible?
Not always. A longer tenure reduces monthly burden but increases total interest paid. Many buyers choose a tenure that balances cashflow comfort and total borrowing cost.
Does this calculator include ABSD?
No. ABSD depends on buyer profile and current policy rates. This page estimates monthly mortgage and BSD only.
Final word
A good mortgage calculator for Singapore should do more than show one monthly number. It should help you understand affordability, total interest, and upfront costs so you can buy with confidence. Use the tool above to run multiple scenarios before making your decision.