Credit Card Interest Calculator for Australia
Calculate how long to pay off credit card debt and total interest charged.
Region: Australia (AUD)
Loading tool…
Quick Tip
Enter the purchase rate from your statement and compare the minimum repayment with a fixed amount you can afford.
About This Tool
Why use Credit Card Interest Calculator?
Many Australian credit cards offer up to 44 or 55 interest-free days on purchases, but only when you pay the closing balance in full. Once you carry a balance, interest is charged at the card's purchase rate, and cash advances usually attract a higher rate from day one.
Your monthly statement includes a minimum repayment warning showing how long it would take to repay the balance with minimum repayments only, and how much faster a higher repayment would clear it. This calculator lets you test any fixed repayment you choose.
Key Benefits
Payoff timeline
See how many months your repayment takes to clear the balance.
Interest cost in AUD
Understand the true cost of carrying a balance.
Balance transfer planning
Work out the repayment needed to clear a transferred balance before the promotional rate ends.
How to use Credit Card Interest Calculator
- 1
Enter the purchase rate from your statement and compare the minimum repayment with a fixed amount you can afford.
- 2
Enter your current card balance.
- 3
Add the card's APR from your statement.
- 4
Enter the fixed amount you plan to pay each month.
- 5
Review the payoff time, total paid and total interest, then try a higher payment.
Best use cases
Find the monthly payment that clears your card by a date you choose.
Compare the cost of paying the minimum with a fixed, higher payment.
Judge a balance transfer offer by running the same balance at both APRs.
Decide which card to pay off first when you carry balances on several.
Credit Card Interest Calculator FAQs
How do interest-free days work?
If you pay the full closing balance by the due date, purchases made in that period attract no interest. If you pay only part of it, you usually lose the interest-free days and pay interest on purchases.
What does the minimum repayment warning show?
It shows how long it would take to pay off the balance with minimum repayments only, the total cost, and the repayment needed to clear the debt within three years.
Are balance transfers a good idea?
They can save interest if you repay the balance during the promotional period. Check the transfer fee, the revert rate and whether new purchases are charged at a higher rate.
Which currency does this credit card interest use?
Amounts are shown in Australian Dollars (AUD). The formulas are the same everywhere, so you can switch to another country version if you need a different currency.
Related Finance Tools
More free finance tools that work well alongside the Credit Card Interest Calculator.