Credit Card Payoff
Calculator
Create a smarter repayment plan, compare avalanche and snowball strategies, and see exactly when you’ll become debt-free — with a month-by-month payment schedule.
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Credit Card Payoff Calculator: Pay Off Debt Faster
Credit card debt is one of the most expensive forms of borrowing available — with average APRs ranging from 18% to 29% in most markets, a $5,000 balance can cost over $2,000 in interest if paid down slowly. Yet the path to becoming debt-free is simpler than most people realise: a clear calculation of how long payoff takes, how much interest minimum payments cost, and how dramatically extra payments change the outcome. This free credit card payoff calculator provides all of that — with multi-card support, four strategy comparisons, and a month-by-month payment schedule.
Quick example: A $3,500 credit card balance at 21.99% APR with $75 minimum payment takes 79 months to pay off and costs $2,418 in interest. Adding just $100/month extra reduces this to 26 months and saves $1,704 in interest. Enter your details above for your personalised payoff plan.
How Credit Card Interest Works
Credit card interest is calculated daily using your Annual Percentage Rate (APR). Each day, your balance is multiplied by the daily periodic rate (APR ÷ 365). At the end of your billing cycle, all daily interest charges are summed and added to your balance. This is why carrying a balance continuously is so expensive — interest compounds daily, meaning you pay interest on interest.
Monthly interest formula:
Monthly interest = Balance × (APR ÷ 12)
Example: $5,000 balance at 22% APR:
Monthly interest = $5,000 × (22% ÷ 12) = $5,000 × 0.01833 = $91.67
If your minimum payment is $100, only $8.33 reduces your actual balance. The other $91.67 is pure interest.
Why Minimum Payments Cost So Much
Credit card minimum payments are designed to keep you in debt as long as possible. Most issuers set minimums at 1–2% of the outstanding balance plus interest — meaning as your balance slowly decreases, so does your minimum payment, extending your payoff timeline for years. Consider a $5,000 balance at 22% APR with a 2% minimum payment:
| Payment strategy | Monthly payment | Total interest paid | Time to pay off |
|---|---|---|---|
| Minimum payments only | $100 (declining) | ~$7,400 | ~22 years |
| Fixed $150/month | $150 | ~$2,100 | ~5 years |
| Fixed $200/month | $200 | ~$1,400 | ~3.5 years |
| Fixed $300/month | $300 | ~$850 | ~2 years |
The difference between minimum payments and a fixed $300/month commitment on a $5,000 debt is staggering: you pay $6,550 less in interest and finish 20 years sooner. This is why the first step in any debt elimination plan is to stop making declining minimum payments and commit to a fixed monthly amount.
Avalanche vs Snowball: Which Strategy Is Better?
When you have multiple credit cards, there are two primary strategies for prioritising repayment. Both allocate the same total monthly payment — they differ only in which card receives the extra principal payment:
Debt Avalanche — lowest total cost
Pay minimums on all cards, then direct all extra payment to the card with the highest APR. Once it’s paid off, redirect to the next highest APR. Mathematically optimal — saves the most interest. Best for people who are motivated by numbers and long-term financial optimization.
Debt Snowball — fastest psychological wins
Pay minimums on all cards, then direct all extra to the card with the lowest balance. Pay off small debts quickly to build momentum and motivation. Research by Nerdwallet and Ramsey Solutions shows people stick to the snowball longer because of the psychological reward of eliminating accounts.
Which saves more?
The avalanche saves more interest — often significantly so when APR differences are large. Example: $3,000 at 24% and $2,000 at 15% — avalanche saves approximately $350 more than snowball with $100 extra payment. The snowball eliminates the $2,000 card first, keeping the high-APR balance accruing longer.
The best strategy is the one you stick to
Academic research consistently shows debt repayment success is primarily a behavioural challenge, not a mathematical one. If the snowball keeps you motivated and engaged, it’s superior to the avalanche that you abandon. Use the strategy comparison in this calculator to see the actual difference for your specific situation.
How Extra Payments Save Money (With Real Numbers)
The impact of extra payments is non-linear — even small additions make a disproportionate difference because they reduce the principal faster, lowering the daily interest accrual basis for all future periods. Here’s what extra payments do to a $4,000 balance at 20% APR with a $80 minimum:
| Extra monthly payment | Total extra paid | Interest saved | Months saved |
|---|---|---|---|
| $0 (min only) | $0 | Baseline | Baseline |
| +$50/month | ~$1,550 | ~$1,200 | ~31 months |
| +$100/month | ~$1,500 | ~$1,600 | ~42 months |
| +$200/month | ~$1,400 | ~$1,900 | ~52 months |
| Lump sum $1,000 now | $1,000 | ~$900 | ~18 months |
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