Why a shrinking minimum payment can keep card debt around

A minimum payment is the amount your agreement requires, not necessarily the amount that clears a balance on the schedule you want. If the minimum depends on a percentage of the balance, it can shrink as you repay. That makes the last portion of the debt last longer than a fixed-payment comparison might suggest.

Enter the rule from your agreement

The credit-card payoff calculator supports two simplified rules: a percentage of the statement balance after interest, or monthly interest plus a percentage of opening principal. Both use an entered minimum floor and cap the last payment at the amount due.

Do not guess that every card uses the same percentage. Check how fees, interest and any minimum floor enter your issuer’s rule. The CFPB minimum-payment resource explains why it is useful to compare paying more than the minimum.

Start with a zero-interest check

A balance of 1,000 with no interest or new purchases is repaid by ten payments of 100. A percentage-based minimum can fall below 100 and take longer. Positive interest adds another reason to inspect both the time and total interest, rather than looking only at the next payment.

Read incomplete projections correctly

A fixed payment below the modelled minimum is flagged. If a payment does not exceed interest, the debt is not shrinking. If a projection still has a balance after 600 months, it stops and reports that limitation. The interest accumulated up to that stop is not the total cost of eventually repaying the debt.

The breakdown lets you compare remaining balances at the same month. A dash after a completed plan means no further payment is required in that plan. An unresolved plan must not be interpreted as a zero balance.

Keep the scenario realistic

This calculation approximates interest as APR divided by twelve. Actual cards often accrue interest daily and may have separate balances at different rates. New purchases, fees, promotional expiries and changing APRs are excluded. Avoid comparing two plans while quietly allowing new spending in only one of them.

If you are considering moving the debt to a fixed-rate loan, compare the full amount financed and fees in the loan calculator. The balance-transfer comparison can help with two amortizing loans, but it does not model a revolving card promotion. The repayment product must match the calculation model.