Singapore Mortgage Payment Calculator
Estimate your monthly housing loan repayment, total interest, and affordability in SGD.
How to use this mortgage payment calculator in Singapore
This calculator helps you estimate monthly repayments for a home loan in Singapore. Enter your property price, down payment, interest rate, and tenure, then click Calculate Payment. The tool will estimate:
- Loan amount based on your down payment (or your custom loan amount)
- Monthly installment
- Total payment and total interest over the full tenure
- Estimated monthly income needed based on a 55% debt servicing ratio
- A first-year amortization breakdown
What makes Singapore mortgage planning different?
Mortgage planning in Singapore is not only about interest rates. You also need to think about financing limits and regulatory checks. A monthly payment that looks affordable on paper may still fail bank assessment if it breaches borrowing frameworks.
1) Loan-to-Value (LTV)
LTV affects how much you can borrow relative to your property value. If your LTV cap is lower, your cash/CPF outlay rises. This calculator lets you test different down payment levels quickly so you can see repayment impact before committing.
2) TDSR and MSR
For many buyers, debt servicing rules matter as much as interest rates:
- TDSR (Total Debt Servicing Ratio): Total debt obligations versus gross monthly income.
- MSR (Mortgage Servicing Ratio): Mainly relevant for certain residential loan categories like HDB/EC purchases.
Even if you can pay a higher monthly installment, lenders may cap the approved loan amount based on these ratios and stress-tested rates.
3) CPF usage strategy
Singapore buyers often use CPF Ordinary Account funds for down payment and monthly servicing. While this can reduce cash flow pressure today, remember that CPF used for housing has accrued interest implications when you sell. Build scenarios with conservative assumptions so your long-term plan stays healthy.
Understanding the mortgage formula
This calculator uses the standard amortizing loan formula for fixed monthly installments:
M = P × r × (1 + r)n / [(1 + r)n − 1]
- M = monthly payment
- P = loan principal
- r = monthly interest rate
- n = total number of months
At the start of your loan, a larger share of each payment goes to interest. Over time, principal repayment accelerates. That is why the first-year amortization table is useful—it shows how your balance actually declines month by month.
Practical tips before you commit
Run at least three scenarios
- Base case: your current expected rate
- Higher-rate case: +1.0% to +1.5%
- Conservative income case: assume lower bonus/variable income
Budget for non-loan housing costs
Many new buyers only focus on mortgage installment. In reality, monthly housing spend may include maintenance fees, sinking fund contributions, property tax, home insurance, and occasional repairs. Use the “Other Monthly Housing Costs” field to get a fuller estimate.
Mind lock-in periods and repricing options
If you take a bank package, check whether your loan is fixed, floating, or pegged to benchmarks like SORA. Also review lock-in clauses and repricing/refinancing flexibility, especially if rates become volatile.
Example: quick interpretation
Suppose your estimated monthly mortgage is SGD 3,800 and your additional housing costs are SGD 300. Your total housing outflow becomes around SGD 4,100/month. If this feels tight after accounting for childcare, transport, insurance, and retirement contributions, consider:
- Increasing down payment to reduce principal
- Choosing a smaller unit or lower purchase price
- Keeping a larger emergency fund before purchase
Final thoughts
A mortgage calculator is not just for “can I buy?”—it is for “can I buy comfortably, safely, and sustainably?” In Singapore’s market, the best plan is usually one that remains manageable under higher rates and life changes. Use this page to test multiple scenarios before meeting your banker or mortgage broker.