A larger monthly amount can reduce interest and shorten a credit card payoff, but only if it fits your budget. Use the tool below to compare a steady plan with an extra amount, then learn what the results mean.
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Try the payoff calculator
Find the balance and APR on your statement. Enter what you can afford each month, then test an extra amount. The example is hypothetical. It does not describe a card offer.
Explore the numbers
What could an extra payment save?
Compare two ways to pay down the same credit card balance. Change the example to see the difference.
Enter your numbers and choose Compare payments.
How this estimate works
This simplified model adds interest once a month at APR ÷ 12, then subtracts a fixed payment. It assumes no new spending, fees or rate changes, and a smaller final payment. Results are rounded to cents and whole months. Actual card interest is often calculated daily, so your statement will differ. This is an estimate, not an offer or repayment schedule.
How card interest works: CFPBRead the results in three steps
- Look at the payoff time. This is how many monthly installments the model needs to bring the debt to zero. The final installment may be smaller. A shorter timeline is useful only if the amount is realistic for your household.
- Compare total interest. This is the borrowing cost in the estimate, separate from the starting balance. The difference between the two columns shows the modeled savings from paying more. It is not cash back or money a lender promises to pay you.
- Use the chart to see the gap. Blue follows your regular plan; green includes the extra amount. Both start with the same debt. Where each line reaches zero is its estimated finish. Matching amounts produce overlapping lines.
A worked example: what changes with another $50?
In this model, a hypothetical $3,000 balance at a fixed 24% APR takes 47 months to clear at $100 per month. Estimated interest is $1,627.31. Increasing that amount to $150 brings the estimate to 26 months and $869.62 in interest.
That is $757.69 less interest and 21 fewer months. These are calculations from the stated assumptions, not typical results or a forecast. Your own costs depend on the agreement, timing and activity on the account.
Choose a next step that fits your budget
- If the extra amount strains your budget: try a smaller increase. Leave room for housing, food, utilities and other required bills. A plan you cannot maintain is not a useful target.
- If the tool says the amount does not cover interest: the debt will not fall under these assumptions. Increase the figure to test a workable estimate. Do not treat this warning as your lender’s actual minimum due.
- If you cannot afford the minimum: contact the issuer promptly and ask about available help. Explain what you can afford and when you expect to resume normal payments. The CFPB outlines steps for handling an unaffordable bill.
- If you have several debts: this tool models one balance at one rate. Do not combine different APRs into one guess and treat it as a full repayment plan.
Why your statement may show a different amount
The estimate uses a monthly rate of APR divided by 12. It adds that charge before subtracting a fixed installment. It excludes new spending, fees, changing rates and introductory periods.
Many issuers calculate interest daily, using an average daily balance. Dates therefore matter. Different types of transactions can also carry different rates. The CFPB explains how card interest is calculated. Check the separate categories and terms on your statement.
For a stable comparison, change one input at a time. First test an affordable increase. Then, if you have a verified alternative rate, compare that separately. This tool does not include transfer charges, account fees or promotional deadlines, so it cannot tell you whether switching offers is worthwhile.
Before putting the plan into practice
Confirm the due date, minimum required and current APR with the issuer. The calculator does not move money, schedule transfers or replace the amount due. Revisit the estimate if you add purchases or the terms change. Inputs are calculated in your browser; this tool does not submit them to a lender.

