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Credit Card Minimum Payment Calculator NZ: See the True Cost of Paying the Minimum

Our calculator shows how long your credit card takes to pay off at the minimum, and how much you save by paying more.
Updated 3 May 2026

Overview
  • Paying only the minimum on a credit card is one of the most expensive financial habits a person can have, and most people who do it have no idea what it costs them.
  • The cost is significant - a $5,000 balance at 22.95% interest, paid at the minimum, can take over 30 years to clear and cost more than $11,000 in interest. Our Credit Card Minimum Payment Calculator shows you exactly how much you would save and how many years you would save them by paying more each month, using the actual minimum payment rules of ANZ, ASB, AMEX, BNZ, Kiwibank, TSB, and Westpac.

How to Use Our Credit Card Minimum Payment Calculator

Enter your current credit card balance and interest rate (most New Zealand credit cards charge between 12% and 28% on purchases, with cash advance rates often higher). Pick the minimum payment rule that matches your bank from the four common NZ formulas:

Best Banks for Clearing Credit Card Debt:
Middle of the pack:
  • American Express: $10 or 3% of the Closing Balance, whichever is greater.
  • ANZ: 3% or $10
  • ASB: 3% or $10 ​​

Worst Banks for Clearing Credit Card Debt: ​
Know This: Each rule means "the larger of X% of your balance, or this dollar amount." Banks that charge 5% drain the balance faster than banks that charge 2%, but the 2% banks are the more common minimum payment trap because the percentage is so low it barely covers the interest each month.

The calculator then shows you two scenarios side by side. The left scenario shows what happens if you only pay the minimum each month. The right scenario shows what happens if you pay a custom amount you choose. The verdict block underneath summarises the savings.

​You can also click any of the payoff target buttons at the bottom to calculate exactly how much you would need to pay each month to clear the debt in 1, 2, 3, or 5 years.

Credit Card Minimum Payment Calculator

See how long your card takes to pay off at the minimum, and what you would save by paying more each month.

$
% Most NZ credit cards charge between 18% and 28% APR. Cash advance rates are typically higher.
The minimum payment is the larger of the percentage of your balance, or the dollar floor.
If you only pay the minimum
38 years, 4 months
Total interest paid $11,500
Total amount paid $16,500
First minimum payment $150
vs
If you paid this much each month
$ /month
2 years, 10 months
Total interest paid $1,750
Total amount paid $6,750
Years saved 35.5 years
!

By paying $200/month instead of the minimum, you save $9,750 in interest and clear your debt 35.5 years sooner.

Or set a payoff target:
Important: This calculator provides indicative figures only and does not constitute financial advice. Actual minimum payment rules and interest rates vary by card, may include additional fees not modelled here (annual fees, late fees, dishonour fees), and may change over time.

Our View: Confirm your card's exact minimum payment formula and interest rate with your bank or card provider before relying on these figures for a financial decision. If you are struggling to manage credit card debt, contact MoneyTalks for free, independent budgeting advice. MoneyHub does not accept liability for decisions made based on this calculator.

Three things worth knowing about credit card minimum payments

1. The minimum payment is designed to keep you in debt, not get you out
  • Banks set the minimum payment percentage just slightly above the monthly interest charge. At 2% minimum payments on a 22% interest rate card, more than 90% of your minimum payment goes to interest in the early months, and almost nothing goes to reducing the principal.
  • The 2% rule used by BNZ and Westpac means a $5,000 balance can take over 35 years to pay off and cost $14,000 or more in interest. The cost is dictated by what banks set as the minimum, and the minimum is deliberately set to maximise the bank's interest income.
​
2. Paying just $50 or $100 more per month transforms the outcome
  • Going from minimum payments to even modest fixed monthly payments dramatically reduces both the time and the interest costs. On a $5,000 balance at 22%, paying $200/month instead of the minimum saves around $9,000 in interest and clears the debt over 30 years sooner.
  • The savings are non-linear, meaning every extra dollar you pay above the minimum saves a disproportionate amount in interest because it directly reduces the principal that future interest is calculated on.

3. A 0% balance transfer can help, but only if you have a real plan
  • If you can't realistically pay your card off in 12-24 months, a balance transfer to a 0% interest card can be a powerful tool, but only if you actually use the interest-free period to clear the balance.
  • Most people who do balance transfers without a fixed-payment plan end up at the end of the promotional period with most of the original balance still outstanding, plus the new card's standard rate (often 25%+). Our calculator's "payoff target" buttons show you the fixed monthly payment you would need to clear your card in a specific timeframe - that's the number to commit to, with or without a balance transfer.​
Related Resources

Credit card guides
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