Credit Card Extra Payment Calculator
If you pay only the minimum on a credit card, most of each payment feeds interest and the balance barely moves. This calculator shows, for one card, exactly what an extra amount each month changes: how many months come off the payoff, how much interest disappears, and when you are debt-free with and without the extra payment.
You can also work the other way. Enter the date you want to be finished, as a number of months, and the tool solves for the monthly payment that gets you there. A one-time lump sum, such as a tax refund or a bonus, can be added on top of either plan.
Leave the target blank to compare minimum-only against minimum plus extra. Fill it in to solve for the payment your target date needs. The simulation assumes no new charges on the card.
Quick Answer
- Quick Answer
- How to use the extra payment calculator
- The payoff math: a fixed payment, simulated month by month
- Worked example: what $150 extra does to a $5,000 balance
- A lump sum, a monthly extra, or both?
- What competing calculators miss
- Frequently Asked Questions
- Add This Calculator to Your Website
- References
How to use the extra payment calculator
Enter the card as it stands. Balance, purchase APR, and the dollar minimum payment printed on your statement. The calculator is pre-filled with the worked example below, so you can press Compare my payoffs first and then swap in your own numbers.
Add what you can pay extra. A monthly extra amount, a one-time lump sum, or both. The lump sum comes off the balance before the monthly simulation starts, which is how a refund or bonus behaves when you send it to the card right away.
Or set a deadline instead. Fill in the debt-free target in months and leave the comparison aside: the tool runs a search over payment sizes and returns the exact monthly payment that clears the card in that time, and how much extra that is over your minimum.
Read both timelines. Each plan shows the payoff length, the debt-free month, and the total interest. The green box states the difference in months and dollars, which is the number worth remembering.
One setting matters more than any other: keep the card closed to new spending while you pay it down. Every simulation here assumes no new charges, because new charges restart the interest clock on a higher balance. If several cards are competing for the same extra money, run each card through separately and send the extra to the highest APR first. That ordering, often called the avalanche method, produces the lowest total interest of any fixed budget.
The payoff math: a fixed payment, simulated month by month
There is no closed-form shortcut in this tool. It repeats the same three steps your issuer applies, once per month, until the balance reaches zero.
The APR in the worked example is not extreme. According to the Federal Reserve G.19 release, the average rate on card accounts assessed interest was 22.15% in the second quarter of 2026, so a 22% example sits right at what revolvers actually pay. At that rate the first month of interest on $5,000 is $91.67. A $125 payment therefore retires only $33.33 of principal in month one, which is why the minimum-only timeline stretches past six years.
Worked example: what $150 extra does to a $5,000 balance
The calculator is pre-filled with this case, and every figure below is what it returns when you press Compare my payoffs.
| Plan | Monthly payment | Time to debt-free | Total interest |
|---|---|---|---|
| Minimum held fixed | $125.00 | 73 months (6 yr 1 mo) | $4,094.54 |
| Minimum plus $50 extra | $175.00 | 41 months | $2,147.07 |
| Minimum plus $100 extra | $225.00 | 29 months | $1,480.69 |
| Minimum plus $150 extra | $275.00 | 23 months (1 yr 11 mo) | $1,138.10 |
| Minimum plus $200 extra | $325.00 | 19 months | $928.28 |
| Minimum plus $300 extra | $425.00 | 14 months | $684.31 |
The pattern in the table is the real lesson. The first $50 of extra does the heaviest work, cutting 32 months and nearly $1,950 of interest, because every early dollar of principal stops compounding for the remaining years. Later dollars still help, but each one has fewer months left to work across. That is also why starting now beats a larger extra payment that starts in six months.
Total interest on a $5,000 balance at 22% APR, by fixed monthly payment. Bar lengths are proportional to the interest cost.
A lump sum, a monthly extra, or both?
Windfalls raise a fair question: is $1,000 sent to the card today worth more than the same money spread out? Run the tool both ways and the answer for this balance is clear. A $1,000 lump sum with the $125 payment held fixed clears the remaining $4,000 in 49 months with $2,079.19 of interest. The lump sum plus the $150 extra clears it in 18 months with $695.01 of interest. Doing both beats either move alone, because the lump sum removes a fifth of the balance before any interest accrues, and the monthly extra then works on a smaller base every single month.
Two cautions belong with that result. First, a lump sum only helps if it stays sent: rebuilding the balance with new spending hands the interest back. Second, keep a basic cash cushion before sending a windfall to a card. A $1,000 emergency that lands back on the same card at 22% undoes the gain, so many households split a windfall between a starter emergency fund and the card. If the honest conclusion from your numbers is that no realistic payment clears the card, compare the payment against a consolidation loan with the credit card debt consolidation calculator before deciding, and check the total payoff date across all your debts with the debt free date calculator.
What competing calculators miss
The leading payoff calculators reviewed for this page are strong on the basic comparison, but each leaves a gap this tool closes.
Miss 1: the reverse question goes unanswered. Most tools ask what payment you can make and report the date. Far fewer start from the date you actually care about, a card cleared before a move, a wedding, or the end of a 0% window, and solve backwards for the payment. The target field here does exactly that, and reports how much of the required payment is extra over your minimum.
Miss 2: lump sums live in a separate tool, or nowhere. Several top tools handle a monthly extra or a one-time payment, but not both in the same simulation. Real payoff plans combine them: a refund lands in March, and a monthly extra runs all year. Here the lump sum reduces the starting balance and the monthly extra runs on top, in one run.
Miss 3: the minimum is modelled as a percent, with no dollar anchor. Tools that ask for a minimum-payment rate of 1% or 2% of balance produce dramatic minimum-only timelines, sometimes decades, that few readers can connect to the dollar figure on their own statement. This tool starts from the dollar minimum you actually pay. The trade-off is disclosed in the formula section above: the dollar amount is held fixed, so treat the minimum-only line as a steady-payment plan, not a prediction of a shrinking issuer minimum.
One limit applies to every tool in this category, including this one. Issuers typically compute interest on an average daily balance, while this simulation works in clean monthly steps, so your statement figures can differ by small amounts. The ranking of plans, and the size of the savings, hold up regardless.
Key takeaways
- Extra payments attack principal early, when it compounds longest: the first $50 a month does more work than any later $50.
- Hold your payment fixed in dollars. A payment that shrinks with the balance is how a six-year payoff quietly becomes a much longer one.
- Set the deadline first if you have one. Solving backwards from a target date turns a vague goal into one exact monthly number.
- As the balance falls, so does your credit utilization, which supports your score while you pay. Track that side of the plan with the credit card usage calculator.
Frequently Asked Questions
Monthly interest = balance x (APR / 12). At 22% APR on a $5,000 balance, the first month adds $91.67 in interest, so a $125 payment puts only $33.33 toward principal.
As a fixed dollar amount that you pay every month until the card clears. Real issuer minimums usually shrink as the balance falls, because they are commonly set as interest plus a small percent of the balance, so a true minimum-only payoff usually takes longer than the fixed-payment line shown here. Holding your payment steady at the first month dollar amount is a deliberate payoff strategy, and it is the plan this tool prices.
Because the minimum is designed to keep the account current, not to clear it. Minimums are typically interest plus 1 to 2% of the balance. On a $5,000 balance at 22%, the $125 minimum barely covers the $91.67 of monthly interest at the start, so the balance shrinks very slowly until the payment finally outruns the interest by a wide margin.
The balance would never shrink, and each month would leave you owing slightly more. The calculator detects this case, refuses to simulate it, and tells you the payment floor: your payment must exceed one month of interest on the starting balance before any payoff timeline exists.
For interest saved, money sent earlier wins, because it stops compounding sooner. A $1,000 lump sum on the worked example cuts the balance to $4,000 immediately, and with the $125 payment held fixed the card clears in 49 months instead of 73. Combining the lump sum with a monthly extra does better than either move alone. Keep a basic cash cushion first, so an emergency does not land back on the card.
Yes. Enter the number of months in the debt-free target field and leave the comparison to one side. The tool searches for the monthly payment that clears the card in exactly that time, $467.97 a month for 12 months on the worked example, and tells you how much of it is extra over your minimum.
Yes. Every payoff simulation assumes no new charges. New spending on top of a payoff plan raises the balance the interest is charged on, and extends the timeline the tool shows.
Yes. Enter 0 for an introductory rate and the whole payment goes to principal, so the tool simply divides the balance by the payment. At $275 a month, a $5,000 balance at 0% clears in 19 months with no interest at all.
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References
- Consumer Financial Protection Bureau, guidance on how card issuers compute interest using the balance and the periodic rate. CFPB: How does my credit card company calculate the amount of interest I owe?. Accessed October 2026.
- Consumer Financial Protection Bureau, plain-language definition of APR and how it prices borrowed money. CFPB: What is APR?. Accessed October 2026.
- Consumer Financial Protection Bureau, “Know Before You Owe: Credit cards” explainer on APRs, minimum payments, and penalty rates in card agreements. CFPB: Know Before You Owe, credit cards. Accessed October 2026.
- Consumer Financial Protection Bureau, Regulation Z Appendix M1: the assumptions issuers must use for minimum payment repayment estimates on statements, including no new charges and a constant APR. CFPB: Appendix M1 to Part 1026, repayment disclosures. Accessed October 2026.
- Board of Governors of the Federal Reserve System, G.19 Consumer Credit release: the average APR on accounts assessed interest was 22.15% in the second quarter of 2026. Federal Reserve: G.19 Consumer Credit. Accessed October 2026.
- Federal Reserve Bank of New York, Household Debt and Credit Report: total US credit card balances and delinquency context for card debt. Federal Reserve Bank of New York: Household Debt and Credit. Accessed October 2026.
- Consumer Financial Protection Bureau, credit card hub: shopping for cards, understanding statements, and paying more than the minimum. CFPB: Credit cards consumer tools. Accessed October 2026.
- Consumer Financial Protection Bureau, debt collection and repayment guidance for consumers dealing with debts they cannot pay on schedule. CFPB: Debt collection consumer tools. Accessed October 2026.
- Federal Trade Commission, consumer advice on getting and reviewing free credit reports, the first check before a payoff plan. FTC: Free credit reports. Accessed October 2026.
- myFICO, education on building credit history: payment history and amounts owed are the two largest FICO Score factors. myFICO: How can I start building my credit history?. Accessed October 2026.
- Consumer Financial Protection Bureau, definition and use of the debt-to-income ratio when judging how much debt a household can carry. CFPB: What is a debt-to-income ratio?. Accessed October 2026.