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Credit Card interest calculator

A little can go a long way. Work out the impact of paying a little extra each month on your credit card.

Kick back with $300 cash back

Get $300 cash back when you open a new ASB Visa Platinum Rewards credit card before 10 May 2026†. No minimum spend required.

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Find out how much faster you could pay off your credit card.

Welcome to our credit card interest calculator. Fill out the fields below to work out how much you could save in time and interest by paying a little extra. This could be useful if you already have an ASB credit card, or are looking to switch your current credit card or store card to an ASB credit card.

This calculator summary is intended as a guide/illustration only and is not an offer of finance from ASB Bank Limited.

A few things you should know about this calculation:

  1. Fees and charges that may be applied to your card (such as the joint account fee, additional card fee or a late payment fee) are not taken into account.
  2. The entire balance is comprised of transactions being charged the purchase interest rate and does not include any cash advances or Smart Rate purchases.
  3. The purchase interest rate does not change during the repayment period shown.
  4. Your account is not overlimit or overdue at any time during the repayment period.
  5. If you owe less than $10, your minimum monthly payment is the amount you owe. Otherwise, your minimum payment is any amount you are over your limit by, or 3% of your closing balance, or $10 - whichever is higher. 

Please see ASB's Credit Card Conditions of Use for more information about our credit cards.

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ASB's lending criteria, terms and fees apply. Interest rate on cash advances currently 22.95% p.a. applies excluding ASB Visa Flex cash advance interest rate currently 9.95% p.a. applies. Interest rates and fees may change. Please refer to the Credit Card rates and fees for other fees and charges.

ASB Visa Platinum Rewards Credit Card $300 Cash back Terms and Conditions:

† Open a new ASB Visa Platinum Rewards credit card account between 2 March and 10 May 2026 and receive $300 cash back.

Offer is not available for customers who hold or have held an ASB Visa Platinum Rewards credit card account in the past 12 months, transfers from an existing ASB credit card, or in combination with any other offers.

Offer is limited to one award of $300 cash back per eligible and qualifying credit card account, and $300 will be paid to the credit card account by 30 June 2026.

The credit card account must be open at the time of ASB issuing the cash back. Offer is not transferable or redeemable for cash.

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