Why credit card debt is the best to attack first
Credit cards carry some of the highest interest rates of any common debt, with average APRs often in the low-to-mid twenties and many cards above 25%. That makes the savings from paying extra larger here than almost anywhere else. Every additional dollar you put down avoids that high rate compounding on your balance, so clearing card debt is usually the single most valuable place to send spare money.
The contrast with other debt is stark. A dollar of extra payment on a 22% credit card saves more than three times the interest of the same dollar on a 7% car loan. On a $6,000 balance at 22% with a $200 payment, adding $100 a month can cut years off the payoff and save thousands in interest. This is why almost every debt-payoff strategy says to clear high-rate card balances before overpaying lower-rate loans.
Escape the minimum-payment trap
The minimum payment on a card is designed to be small, often calculated as roughly 1% to 3% of the balance plus that month's interest. It is engineered to keep you in debt: because it falls as your balance drops, paying only the minimum can stretch a modest balance out for well over a decade and see you repay far more than you originally borrowed.
The way out is to decide on a fixed amount well above the minimum and hold it steady every month, even as the balance falls. Holding the payment flat means a growing share of each payment hits principal, so the balance falls faster and faster. This calculator models exactly that: a fixed monthly payment plus an extra amount, all working against the balance, which is the single most effective change most cardholders can make.
Balance transfers and consolidation
If your balance is large relative to your income, lowering the rate itself can help as much as paying extra. A 0% balance-transfer card moves your debt to an introductory period with no interest, usually for a fee of 3% to 5% of the amount transferred, so every payment during that window goes entirely to principal. The catch is the promotional rate ends, so it only works if you clear most or all of the balance before then.
A fixed-rate personal loan used to consolidate card debt can also cut the rate sharply, often from the twenties down to single digits or low teens, while giving you a clear payoff date. You can model the lower rate in the calculator above to see how much interest a transfer or consolidation would save. Whichever route you take, the discipline that makes it work is the same: stop adding new charges to the card while you pay it down.
One simplification to keep in mind
This tool assumes a fixed monthly payment and monthly compounding, which is the standard way to estimate a payoff. Real credit cards set a minimum that shrinks as your balance drops and most compound interest daily rather than monthly, so your statement may differ slightly from the figures here. The direction is always the same, though: paying more and holding it steady clears the balance faster and costs less.
Paying a steady fixed amount, as modeled here, is also a faster strategy than following the card's own minimum, precisely because you are not letting the required payment fall over time. If you can, paying more than once a month or as soon as you are paid also helps a little on cards that compound daily, since the balance the interest is calculated on is lower for more of the month.
Keep the balance gone once you clear it
Paying off a card is only half the battle; the harder part is keeping it at zero. Because the credit line stays open, it is easy to drift back into carrying a balance, which is why so many people pay a card down and then watch it climb again. While you are in payoff mode, the single most effective rule is to stop putting new spending on the card you are clearing, so every payment makes real progress instead of treading water.
Once the balance is gone, redirect the money you were paying toward your next debt or into savings, so the habit keeps working for you rather than disappearing into extra spending. If you tend to use the card for convenience, paying the statement in full each month means you use the card for free and never pay interest again. The calculator above is most useful as the plan that gets you to zero; staying there is about the routine you build afterward.
A worked example on a $6,000 card balance
Use the figures this page loads with: $6,000 owed at 22%, a $200 fixed payment, and $100 extra. The monthly rate is 22% divided by 12, about 1.83%. In the first month, interest is $6,000 times 0.0183, roughly $110. That leaves only about $90 of a $200 payment to reduce the balance, which is exactly why high-rate card debt is so hard to escape on small payments. Adding $100 extra more than doubles the principal you retire, to around $190 in month one.
Contrast that with paying the minimum. A minimum of, say, 2% of the balance plus interest would be only about $230 here and would shrink every month as the balance fell, stretching the debt out for well over a decade. Holding a fixed $300 total steady instead, as the calculator above models, clears the balance in a small fraction of that time and saves over a thousand dollars in interest. Because a dollar against 22% debt saves more than three times what it would against a 7% loan, this is almost always the first place to send spare money.
| Extra/month | Payoff time | Interest paid | Time saved | Interest saved |
|---|---|---|---|---|
| $0 (required only) | 3 yr 8 mo | $2,791 | — | — |
| $50 | 2 yr 8 mo | $1,979 | 1 yr | $812 |
| $100 (this page's default) | 2 yr 2 mo | $1,543 | 1 yr 6 mo | $1,248 |
| $150 | 1 yr 9 mo | $1,269 | 1 yr 11 mo | $1,521 |
| $200 | 1 yr 6 mo | $1,081 | 2 yr 2 mo | $1,709 |
Frequently asked questions
- Why pay a fixed amount instead of the minimum payment?
- The minimum payment falls as your balance drops, which stretches the debt out for years and piles on interest. Paying a steady fixed amount well above the minimum keeps your momentum and clears the balance far sooner. That fixed approach is what this calculator models.
- Would a balance-transfer or consolidation loan help?
- Moving high-rate card debt to a 0% balance-transfer card or a lower-rate personal loan can cut the interest dramatically, as long as you keep paying it down and watch for transfer fees. You can model the lower rate here to see the difference it would make.
- Should I pay off the highest-rate card first?
- If you carry balances on several cards, sending extra to the highest-rate card first saves the most interest overall. Some people prefer to clear the smallest balance first for motivation. This calculator models one balance at a time.
- How accurate are these numbers?
- The calculation assumes a fixed rate and consistent monthly payments, compounded monthly. Your actual statement may differ a little because of rounding, payment timing, or rate changes. Use these figures as a guide, not a lender quote.
- Is this financial advice?
- No. This tool only shows the payoff math for the numbers you enter. It does not account for your wider finances, and it is not advice. The figures from your lender are the ones that count.