Mortgage Calculator
Estimate your monthly home loan repayment, the total interest you'll pay and a full year-by-year amortisation schedule. Adjust the price, down payment, rate and tenure to compare scenarios.
1-Month Compounded SORA
1.0992%
as of 2026-06-04
3-Month Compounded SORA
1.0579%
as of 2026-06-04
25% of price — loan of $450,000
Default 1.66% is a representative SORA-based floating package — adjust to your bank's quote.
Monthly repayment
$1,833.74
On a $450,000 loan over 25 years at 1.66% p.a.
Loan amount
$450,000
Total interest
$100,122
Total paid
$550,122
Estimates only, assuming a constant interest rate over the full tenure. Actual SORA-based rates reset periodically and your repayment will change; bank quotes, fees and lock-in terms vary.
| Year | Principal paid | Interest paid | Balance |
|---|---|---|---|
| 1 | $14,646 | $7,359 | $435,354 |
| 2 | $14,891 | $7,114 | $420,463 |
| 3 | $15,140 | $6,865 | $405,323 |
| 4 | $15,393 | $6,612 | $389,930 |
| 5 | $15,651 | $6,354 | $374,279 |
| 6 | $15,913 | $6,092 | $358,366 |
| 7 | $16,179 | $5,826 | $342,188 |
| 8 | $16,449 | $5,556 | $325,738 |
| 9 | $16,724 | $5,280 | $309,014 |
| 10 | $17,004 | $5,001 | $292,010 |
| 11 | $17,289 | $4,716 | $274,721 |
| 12 | $17,578 | $4,427 | $257,143 |
| 13 | $17,872 | $4,133 | $239,271 |
| 14 | $18,171 | $3,834 | $221,101 |
| 15 | $18,475 | $3,530 | $202,626 |
| 16 | $18,784 | $3,221 | $183,842 |
| 17 | $19,098 | $2,907 | $164,744 |
| 18 | $19,417 | $2,587 | $145,327 |
| 19 | $19,742 | $2,263 | $125,585 |
| 20 | $20,072 | $1,932 | $105,512 |
| 21 | $20,408 | $1,597 | $85,104 |
| 22 | $20,750 | $1,255 | $64,354 |
| 23 | $21,097 | $908 | $43,258 |
| 24 | $21,449 | $555 | $21,808 |
| 25 | $21,808 | $197 | $0 |
How a Singapore home loan is repaid
Your loan is the property price less the down payment you put up in cash and CPF. You then repay it in equal monthly instalments over the tenure. Early on, most of each instalment is interest on a large outstanding balance; as the balance falls, more of each payment goes towards principal — which is why the amortisation chart curves downwards faster in later years.
Two levers matter most for total cost: the interest rate and the tenure. A lower rate or a shorter tenure both reduce the interest you pay over the life of the loan, while a larger down payment shrinks the principal you borrow in the first place.
SORA-based floating rates
Most new Singapore packages are pegged to the 3-month Compounded SORA plus a bank spread. Because SORA resets periodically, a floating-rate repayment is not fixed — treat the figure here as a snapshot at today's rate. To plan a switch to a cheaper package, see our mortgage refinance calculator, and check your borrowing headroom with the TDSR and HDB affordability calculators.
Frequently asked questions
How is my monthly mortgage repayment calculated?
It uses the standard level-payment amortisation formula: M = P × i / (1 − (1 + i)⁻ⁿ), where P is the loan amount (property price minus your down payment), i is the monthly interest rate (annual rate ÷ 12) and n is the number of months. Each instalment first covers the interest on the outstanding balance, with the rest reducing the principal.
What interest rate should I use?
The default of around 1.66% reflects a representative Singapore floating-rate package — roughly the 3-month Compounded SORA plus a typical bank spread of about 0.60% in mid-2026. SORA-based rates reset periodically, so your actual repayment can move up or down. HDB concessionary loans are charged at 2.6%. Enter the rate your bank has quoted for a precise figure.
How much down payment do I need?
For a bank loan the maximum loan-to-value (LTV) is generally 75% for a first property, so you typically need at least 25% down (with at least 5% in cash). HDB loans allow a higher LTV. Adjust the down payment field to see how a larger deposit shrinks both your loan and your total interest.
How does a longer loan tenure affect the cost?
A longer tenure lowers each monthly instalment but means you pay interest for more years, so the total interest is higher. A shorter tenure costs more per month but far less overall. Singapore caps tenure (e.g. up to 30 years for HDB and 35 for private property, subject to age limits).