Work out the repayments and total interest on a personal loan, weekly, fortnightly or monthly.
Updated October 2026Built and checked by MaverickHow it's calculatedReport an error
Repayment a month
$525.05
Total interest
$6,503
Over loan term
Total repayments
$31,503
60 payments
Falls from $20,899 to zero over 5 years.
Same loan amount and term: only the rate changes.
Early years are mostly interest. Late years are mostly principal.
Total interest over the life of the loan. Fortnightly is usually the sweet spot.
A personal loan is repaid in regular instalments over a set term, and each repayment covers that period's interest plus part of the balance. Enter the amount, the rate on your quote and the term to see the repayment, the total interest and how the balance falls year by year. The rate is what you're offered, not the headline rate: lenders may look at your credit score, income, expenses and savings when they set it. Fees aren't included, so check the comparison rate and the fee schedule on any offer as well.
As of 7 November 2026, the lowest personal loan rate is 5.80%, from Plenti Personal Loan, while the typical best across 68 institutions is 7.96%.
Sam borrows $25,000 at 9.5% over 5 years to buy a used car.
The repayment is $525 a month and the total interest $6,503. Over 4 years the repayment rises to $628 a month and the interest falls to $5,148, $1,355 less.
Emma is offered $15,000 at 11% over 3 years for a kitchen renovation.
The repayment is $491 a month and the total interest $2,679, before any fees.