Loan repayment calculator
Estimate repayments and total interest for a personal, car or other amortising loan.
What the result means
An amortising loan has a level repayment that pays interest first and reduces principal over a fixed term. Personal and car loans usually work this way; credit cards do not.
How it is calculated
Repayment = P × r(1+r)^n / ((1+r)^n − 1)
- P: Principal.
- r: Period rate (annual ÷ 12, 26 or 52).
- n: Number of payments.
The PMT formula finds the constant payment that clears the loan if every payment is made on time.
Assumptions
- Estimates only — not tax, legal, credit or financial advice. Check the official source or your contract before relying on a figure.
- Fixed rate, no fees, no balloon, no extra repayments.
Worked example
$25,000 over 5 years at 9.5%
A car loan repaid monthly.
- Payments
- 60
- Monthly rate
- 9.5% ÷ 12
- Repayment
- About $525
Interest over five years is a large extra cost on top of the $25,000 car price.
Comparison rates and fees are extra
Lenders must often advertise a comparison rate that folds in some fees. This calculator uses the interest rate you type and ignores establishment fees, balloon payments and early-exit costs.
Use the mortgage calculator for home loans — those terms are longer and often include offset and extra-repayment choices.
Questions
Is this a personal loan or a credit card?
A fixed-term amortising loan. Revolving cards belong on the credit card calculator.
Related calculators
- Credit cardEstimate how long a card balance takes to clear at a fixed monthly payment, and the interest you would pay.
- MortgageEstimate loan repayments, total interest and the principal/interest split for an Australian home loan.
- Simple interestCalculate interest as principal × rate × time, without compounding.
Sources
Moneysmart (ASIC)
Last reviewed 2026-08-19
Money · Last reviewed 2026-08-19
Estimates only. Not tax, legal or financial advice. Check official sources before relying on a figure.
Printed from OzCalc (ozcalc.com). Last reviewed 2026-08-19. Estimates only — not tax, legal or financial advice.