💰 Money Calculator

Credit Card Interest Calculator

See the true cost of carrying a credit card balance. Find out how long it will take to pay off your debt and how much interest you'll pay — then see how much you save by paying more each month.

Credit Card Interest Calculator
See the true cost of carrying a balance
$
%
$

Monthly interest on this balance: $83.29

Time to pay off
4y 2m
50 monthly payments
Total interest paid$2,357.06
Total amount paid$7,357
Interest as % of balance47%
💡 Balance transfer tip: Many Australian cards offer 0% balance transfer for 12–24 months. If you can pay off the balance in that window, you'll save all of the interest above.

The minimum payment trap

Paying the minimum on a credit card is one of the most expensive financial habits Australians have. A $5,000 balance at 19.99% p.a., paying only the minimum (2% of balance), takes over 30 years to repay and costs nearly $13,000 in interest — more than double the original debt.

Monthly paymentTime to pay offTotal interest
Minimum (~$100)30+ years$13,000+
$150/month4 years 8 months$3,300
$200/month2 years 11 months$2,000
$300/month1 year 11 months$1,270

Based on $5,000 balance at 19.99% p.a.

Debt avalanche vs debt snowball

If you have multiple cards, two popular payoff strategies exist. The debt avalanche pays the highest-rate card first — mathematically optimal, minimises total interest paid. The debt snowball pays the smallest balance first — less optimal financially, but provides psychological wins that keep people motivated. Most financial advisers recommend the avalanche for credit cards, where rates are high and close together.

Frequently asked questions