If you've been paying your credit card every month and the balance looks roughly the same as it did last year, you're not imagining it and you haven't done anything wrong. That's what minimum payments are built to do.
Here's the arithmetic, with the assumptions stated so you can check it against your own card.
A worked example
Take a $5,000 balance at 22.9% APR — a fairly ordinary rate. We'll assume a typical minimum payment structure: 1% of the balance plus the interest that accrued that month, with a $25 floor. Your cardholder agreement will spell out your card's exact formula, and it may differ.
Your first month's interest is $5,000 × 22.9% ÷ 12 = $95.42.
Your minimum payment is 1% of $5,000, which is $50, plus that $95.42 of interest. So you pay $145.42.
Now look at where it went. Ninety-five dollars covered interest. Fifty dollars came off what you owe. You paid $145 and your debt fell by $50.
That's the whole mechanism. The minimum payment formula is designed to cover the interest and shave a sliver off the principal. It's not a scam — it's disclosed, it's legal, and it keeps your account in good standing. It's just extremely slow.
Where it ends up
Keep paying exactly the minimum on that $5,000 card and you'll be at it for roughly 19 years. Total interest comes to somewhere around $8,400.
You'd repay about $13,400 on a $5,000 debt. More than two and a half times what you originally spent.
And the payment shrinks as you go, which is the part that really stretches it out. Because the minimum is a percentage of the balance, a smaller balance means a smaller required payment. Pay the minimum faithfully and the amount you're asked for keeps falling — so your progress keeps slowing down. The finish line moves away from you as you approach it.
What actually changes the outcome
Now the useful part. Pay a fixed amount instead of a shrinking one, and the picture transforms.
Same $5,000, same 22.9% APR, but you pay a flat $200 every month regardless of what the statement asks for:
You're done in under three years — about 35 months. Total interest lands around $1,860.
So $200 a month instead of a minimum that starts at $145 and falls from there. Roughly $55 more in month one. That difference saves you something in the region of $6,500 and about sixteen years.
That's the single most important thing to understand about credit card debt. It isn't which card you pay first, and it isn't finding a clever product. It's paying a fixed amount that doesn't shrink when the statement lets it.
Why the fixed amount matters so much
When you pay the minimum, roughly two thirds of your payment is interest in the early months, and the portion of your payment doing real work stays permanently small because the payment itself keeps falling.
When you fix the payment, the interest portion shrinks every month while the payment stays the same — so more of each payment attacks the principal than the month before. The effect compounds in your favour. The last year of a fixed-payment plan moves dramatically faster than the first.
This is why the advice "always pay more than the minimum" is repeated so often. It's not moralising about discipline. The underlying maths genuinely is that lopsided.
What to do this week
Work out your real numbers. Not an estimate. Every card, current balance, actual APR. The free payoff spreadsheet will total it up and show you what your debt costs per month.
Pick a fixed monthly figure you can genuinely sustain. Sustainable beats heroic. A payment you can hold for two years does more than one you abandon in month three. Look at what you paid last month across all cards and see whether you can round it up.
Pay that same number every month, whatever the statement says. Set up a standing transfer if it helps. The goal is to stop the payment from shrinking.
Choose an order for the extra. Highest rate first saves the most; smallest balance first gives you a win sooner. Comparison here.
Stop adding to the balance. Obvious, but worth stating. It's very hard to outrun new spending on a card charging over 20%.
If the minimum payment is already at the edge of what you can afford, that's a different situation and a spreadsheet won't fix it. Contact a non-profit credit counselling service — in the US, the National Foundation for Credit Counseling is a reasonable starting point. Free advice exists and it's worth taking before the situation hardens.
If you want the structured version
OFF THE CARD ($24.99, one-time, 30-day money-back guarantee) includes a payoff guide, printable worksheets, a 90-day plan, and a tracker that runs these calculations for your actual cards rather than an example.
Product recommendation
Recommended DaveWays resources
OFF THE CARD
A plain-English credit-card payoff toolkit with a guide, printable worksheets, a 90-day plan, and an Excel or Google Sheets-compatible tracker.
Budget Blueprint
A monthly budgeting workbook for planning income, bills, flexible spending, and savings.
FAQ
Why isn't my balance going down even though I pay every month?
Because most of a minimum payment covers interest. On a $5,000 balance at 22.9%, about $95 of a $145 minimum is interest. Add any new spending and the balance can rise even while you pay.
How much extra should I pay?
Any amount helps, and the first extra dollars help most because your balance is highest early on. Pick a fixed figure you can hold rather than a large one you can't.
Is it bad to only pay the minimum?
It keeps your account current and protects your credit, which matters. It's just an expensive and very slow way to clear debt. If minimums are all you can manage right now, that's a cash-flow problem worth getting advice on.
Do all cards calculate minimums the same way?
No. Common formulas are a percentage of the balance, or a percentage plus interest and fees, with a floor of around $25 to $35. Yours is in your cardholder agreement.
Is this financial advice?
No. It's educational arithmetic. Your card's terms and your circumstances are specific to you.
Educational resource only. Not financial, tax, legal, or credit advice.
Assumptions behind the figures: $5,000 starting balance, 22.9% APR, no new spending, no fees. Minimum payment modelled as 1% of the balance plus accrued interest with a $25 floor. The fixed-payment comparison uses a flat $200 per month at the same APR. Different minimum payment formulas produce different timelines — check your cardholder agreement.
Free checklist
Get the 5-Step Credit Card Payoff Checklist.
A one-page printable checklist to list balances, choose a payoff method, and pick the next card to target. Free by email, unsubscribe anytime.
