Why Credit Card Minimum Payments Cost So Much

Interest gets paid before the balance disappears

A credit-card annual percentage rate is converted into periodic interest and applied to the outstanding balance. If the payment is only slightly larger than that interest, very little principal is repaid. As the balance falls, the interest charge falls too—but getting to that point can take years.

A fixed-payment example

For a £5,000 balance at 22% APR with no new purchases, a fixed payment of £150 a month takes approximately 52 months to clear in a simplified monthly model. Total interest is about £2,798. The borrower repays roughly £7,798 in total.

Real minimum payments often change with the balance and can include fees or a minimum cash amount. Use the payment shown in your agreement or statement and update the calculation when the rate changes.

What an extra payment changes

Money paid above the interest charge reduces principal sooner. That smaller principal then generates less interest next month, allowing more of the following payment to reduce the balance. This is why a consistent extra payment can have a disproportionate effect on both time and total cost.

Before using a balance transfer

• Include the transfer fee.
• Check the promotional end date and post-promotion APR.
• Confirm whether new purchases receive the same rate.
• Choose a payment that clears the balance before the offer expires.
• Avoid adding new spending to the old or new card.

If the entered payment does not cover monthly interest, the calculator flags that the debt will not reduce. If required payments are unaffordable, contact the lender or an appropriate nonprofit or regulated debt adviser rather than relying only on a projection.

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