Mortgage Repayment Calculator
Estimate your principal-and-interest repayments and the total interest over the life of the loan. Switch frequency to see how paying fortnightly or weekly changes the picture.
Repayment
$3,593.45
per month
Total interest
$693,641
Total repaid
$1,293,641
What you repay
- Principal (the amount borrowed)
- $600,000
- Interest over the full term
- $693,641
- Total cost of the loan
- $1,293,641
Getting the most from this
The repayment is fixed for a principal-and-interest loan, but the total interest swings hugely with the rate and term. Before you settle on a loan, compare the rate against the wider market — see our home loan comparison and read how the comparison rate works so you’re weighing fees as well as the headline rate.
Once you have a loan, paying even a little above the minimum cuts the interest and the term — model that with the extra repayments calculator.
FAQs
How is a home loan repayment calculated?
It’s the fixed amount that pays the loan off over its term, derived from the loan size, the rate per period and the number of periods. Early repayments are mostly interest; the principal portion grows over time.
Does paying weekly or fortnightly reduce my repayments?
Each payment is smaller, but paying half the monthly figure every fortnight makes the equivalent of 13 monthly repayments a year — so you finish sooner and pay less interest. Compare frequencies above.
Why is the total interest more than the loan?
Over 25–30 years, interest on the slowly reducing balance adds up. A higher rate or longer term increases it sharply — and shaving a few years off saves tens of thousands.
Is this calculator financial advice?
No — it gives general estimates using a simplified model (constant rate, regular repayments, no fees or offset). Your lender’s figures will differ. Confirm before deciding.
Estimates only, for general information. Assumes a constant interest rate and regular principal-and-interest repayments, and excludes fees, charges and any offset. Not financial advice — confirm figures with your lender.