Minimum Payment Trap Calculator
Only paying the minimum feels manageable — that is the trap. We simulate the standard minimum formula (interest + 1% of the balance, $25 floor) and show how many years it takes, what it costs, and what a fixed payment would save.
Minimum payments only
Same balance, fixed payment instead
How it works
A typical card minimum is that month's interest plus 1% of the balance, with a $25 floor. On a $5,000 balance at 24.99%, the first minimum is about $154. That sounds reasonable — until you see the timeline: paying only the shrinking minimum takes nearly 20 years, and the interest alone comes to about $9,300 — almost double the original balance.
The trap is built into the formula. Because the minimum shrinks as the balance shrinks, your payment falls just as your principal payments should be growing. Late in the plan you can be paying $30 a month on a few hundred dollars of balance — mostly interest, month after month.
The escape is a fixed payment. Pick a number you can hold — even $150 a month on that same $5,000 balance — and pay it every month even as the minimum falls. The difference is usually measured in years and thousands of dollars. That fixed number is your real plan; the minimum is just the floor the card company sets.
Frequently asked questions
How is the minimum payment calculated?
Most major issuers charge that month's interest plus 1% of the balance, with a $25 minimum. The exact formula varies by issuer — some use 2% of the balance, some a flat percentage — but all of them shrink as the balance shrinks.
How long does paying only the minimum take?
On a $5,000 balance at 24.99% APR, minimum-only payments take nearly 20 years, and total interest runs past $9,000 — almost double the balance itself. The exact numbers depend on the issuer's formula.
Will minimum payments hurt my credit score?
They keep the account current, so they don't hurt directly. But a high balance relative to your limit (high utilization) does drag your score down, and minimum-only payments keep utilization high for years.
What is the smallest fixed payment that makes sense?
Any fixed payment above the first minimum helps. A common target: 3% of the balance per month, held steady. On $5,000 that is $150 — and it usually cuts the payoff from nearly 20 years to under 5 years.
Why do issuers set the minimum so low?
Minimums are designed to keep accounts current while maximizing interest revenue. That is legal and disclosed in your card agreement — which is exactly why a fixed payment you choose yourself beats the minimum they choose for you.
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