How card interest works against you
Credit cards charge interest daily on your balance, quoted as an annual rate (APR). Each month a chunk of your payment just covers that interest; only the remainder reduces what you owe. The higher the APR and the smaller the payment, the more of your money disappears into interest instead of clearing the debt.
The payoff accelerator
Increasing your monthly payment has an outsized effect because the extra goes entirely to the balance, which then accrues less interest next month. Raise the payment above and watch both the time and the total interest drop — paying just a little more is often the single best return available to you.
Frequently asked questions
Why does credit card debt take so long to clear?
Card APRs are high, so a large share of each payment goes to interest rather than the balance. If you only pay the minimum, the balance barely moves and the debt can take many years and cost more in interest than the original amount.
What happens if my payment is too low?
If your monthly payment is less than the interest charged that month, the balance grows instead of shrinking and the debt is never repaid. The calculator warns you when this happens.
How can I pay off my card faster?
Pay more than the minimum, stop adding new charges, and consider a lower-rate balance-transfer or consolidation loan. Even a small increase in the monthly payment can cut months off and save significant interest.
Last updated: June 2026