OzCalc
MoneyLast reviewed 2026-08-19

Loan repayment calculator

Estimate repayments and total interest for a personal, car or other amortising loan.

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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.

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Sources

Money · Last reviewed 2026-08-19

Estimates only. Not tax, legal or financial advice. Check official sources before relying on a figure.