Singapore Mortgage Calculator
Your loan
No official mortgage-rate data for this country — enter the rate from your lender.
- Principal & interest$7,951
Upfront costs
- Down payment$375,000
- Stamp duty$44,600
- Legal fees%$4,500
- Cash needed at purchase$424,100
What if interest rates change?
Your payment today is just the start. See how it could move if rates go up or down during your loan.
Range: 6.65% to 7.35% · The rate resets once a year after month 24.
Likely range of your monthly payment
- Most likely
- 80% of outcomes
- Middle 50% of outcomes
- If today's rate holds
In 8 out of 10 simulated futures, you pay between $1,233,593 and $1,288,831 in total interest (today's rate: $1,260,380).
| Scenario | Avg. monthly | Highest monthly | Total interest | vs. today |
|---|---|---|---|---|
| Rate stays at 7.00% | $7,951 | $7,951 | $1,260,380 | — |
| Drops to 6.65% at first reset | $7,734 | $7,951 | $1,195,245 | ▼ −$65,135 |
| Rises to 7.35% at first reset | $8,171 | $8,191 | $1,326,421 | ▲ +$66,041 |
| Climbs steadily to 7.35% | $8,029 | $8,085 | $1,283,802 | ▲ +$23,423 |
| Falls steadily to 6.65% | $7,874 | $7,951 | $1,237,154 | ▼ −$23,226 |
| Spikes to 7.35% for 3 years | $7,997 | $8,191 | $1,274,227 | ▲ +$13,847 |
Based on 600 simulated rate paths that drift randomly within your range and tend back toward today's rate. This is an illustration, not a forecast.
Loan balance over time
- Remaining balance
- Interest paid (cumulative)
- Principal paid (cumulative)
Buying a home in Singapore: rules and costs
- Buyer's Stamp Duty is progressive from 1% to 6%; Additional Buyer's Stamp Duty applies to second homes and foreign buyers.
- Bank loans are capped at 75% loan-to-value for a first housing loan; at least 5% must be paid in cash.
- Total debt servicing must stay within 55% of income, and HDB flat repayments within 30% (MSR).
Sources: IRAS — Stamp Duty · MAS · Rules last reviewed 2026-10.
Frequently asked questions
How is the monthly mortgage payment calculated?
For an equal-payment loan, the payment is P × i × (1 + i)^n ÷ ((1 + i)^n − 1), where P is the loan amount, i the monthly interest rate and n the number of months. Taxes, insurance and fees are added on top.
What is the current average mortgage rate in Singapore?
Singapore does not publish an official average mortgage rate that we can track. Ask several lenders for quotes and enter the rate in the calculator.
How much does a 1-point rate rise change my payment?
On a $1,125,000 loan over 25 years, going from 7.00% to 8.00% raises the monthly payment from $7,951 to $8,683 — about $732 more each month.
What upfront costs should I budget for in Singapore?
On a $1,500,000 purchase, expect about $49,100 in taxes and fees on top of your down payment. The breakdown is shown in the calculator above.
Can this calculator predict future interest rates?
No. The scenario tool shows a range of possible outcomes based on the band you choose. Nobody can predict rates reliably — use it to check whether you could still afford the loan if rates rise.