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.
Monthly interest on this balance: $83.29
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 payment | Time to pay off | Total interest |
|---|---|---|
| Minimum (~$100) | 30+ years | $13,000+ |
| $150/month | 4 years 8 months | $3,300 |
| $200/month | 2 years 11 months | $2,000 |
| $300/month | 1 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
Monthly interest on this balance: $83.29