Mortgage repayment calculator
Enter a loan, drag the rate and term, and see the monthly repayment, total interest and total repaid. A $600,000 loan at 6% over 30 years is about $3,597.30 a month.
Mortgage repayment calculator
Principal & interest$3,597.30 per month
- Loan amount
- $600,000
- Total repaid over 30 years
- $1,295,029.13
- Total interest
- $695,029.13
Assumes a constant 6.00% rate over 30 years. Interest-only periods and rate changes will alter the total. Full breakdown for a $600,000 loan →
Every loan amount
- $200,000
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Borrowing powerWhat you could borrowRefinance break-evenIs a lower rate worth switching?Stamp dutyThe other big upfront cost
Common questions
- How are mortgage repayments calculated?
- Principal-and-interest repayments use the standard amortisation formula: the monthly payment that clears the loan over the term at a constant rate. A $600,000 loan at 6% over 30 years is about $3,597.30 a month, with total interest of about $695,029.13.
- What is the difference between principal-and-interest and interest-only?
- Principal-and-interest repayments pay down the loan over time. Interest-only repayments cover just the interest, so the balance does not fall and the payment is lower during the interest-only period — but you pay more interest overall.
- Does this include fees or rate changes?
- No. It assumes a single constant rate and no fees. Your lender may charge account or offset fees, and a variable rate will move. Use it to compare scenarios, not as a formal quote.