Credit Card Monthly Payment Calculator and Payoff Cost

A credit card monthly payment calculator estimates the fixed monthly payment needed to repay a balance over a chosen number of months, plus the total interest paid. Enter your balance, APR, and payoff term to see the estimate; it assumes no new purchases or fees and a constant APR.

Formula

The calculator uses the standard fixed-payment amortization formula. It finds a payment that, if made at the end of every month, brings the balance to zero after the selected number of payments:

Monthly payment = round(B × r ÷ [1 − (1 + r)⁻ⁿ], 2)

• B = starting card balance, in dollars.
• r = monthly interest rate, calculated as APR ÷ 1,200. APR is entered as a percentage per year; for example, 20% gives a monthly rate of 0.016667.
• n = number of monthly payments, calculated as payoff years × 12.
• Monthly payment is rounded to the nearest cent.

Total of payments = rounded monthly payment × number of months. Estimated total interest = total of payments − starting balance. Because the monthly payment is rounded, the final payment in an actual account may differ slightly from this level-payment estimate.

Worked Example

Using the calculator’s defaults: a $2,000 balance, 20% APR, and a two-year payoff term.

1. Convert APR to a monthly rate: 20 ÷ 1,200 = 0.0166667.
2. Convert the term to payments: 2 × 12 = 24 months.
3. Apply the payment formula: $2,000 × 0.0166667 ÷ [1 − (1.0166667)⁻²⁴] = $101.79 per month, rounded to cents.
4. Calculate the total: $101.79 × 24 = $2,442.96.
5. Estimate interest: $2,442.96 − $2,000 = $442.96.

The calculator therefore displays a monthly payment of $101.79, total payments of $2,442.96, and estimated interest of $442.96.

Assumptions

• The APR remains fixed for the full payoff period.
• Payments are made monthly at the end of each period.
• Interest compounds monthly at APR divided by 12.
• No new purchases, cash advances, balance transfers, fees, penalty charges, or other account activity are included.
• The model does not include taxes, insurance, or other costs; these are not part of the card-balance calculation.

How to Use the Estimate

Enter the balance you want to repay, not necessarily the card’s credit limit. Use the APR that applies to that balance, then select a payoff period. The first result is the level monthly payment implied by those inputs. Total payments and interest help show how the payment period affects the overall cost under the stated assumptions.

For a useful estimate, check the account statement or disclosure for the relevant balance and APR. A card can have different rates for purchases, cash advances, or transferred balances. If a balance has more than one rate, calculating each portion separately may be more informative than entering one blended figure. The calculator does not retrieve account data or determine which rate applies.

Try more than one payoff term to understand the arithmetic tradeoff: a shorter term produces a larger required monthly payment but fewer months for interest to accrue, while a longer term lowers the modeled monthly payment and generally raises the total interest under the same APR. These are mathematical comparisons, not a recommendation about what payment or term to choose.

What a Credit Card Minimum Payment Means

This calculator estimates a fixed payment designed to clear the balance by a selected date. A card’s required minimum payment is a separate amount determined by the account’s terms and balance. It may change from month to month, and paying only the minimum may not repay the balance within the term entered here. The calculator cannot determine a card’s minimum because issuer formulas and account details are not inputs.

Do not treat the displayed payment as the amount required by your account. Check the current statement for the minimum due and due date. If your actual payment is below the interest charged and any applicable fees, the balance may not decline as expected; this calculator assumes the payment fully follows its fixed amortization schedule.

Limits and Common Sources of Difference

• Changing APR: A variable rate or a change to the applicable rate changes future interest, but this estimate holds APR constant.
• New spending: Purchases or cash advances add to the amount owed and can have different rates or timing. They are excluded.
• Payment timing: The model uses regular end-of-month payments. Actual daily balance calculations, statement cycles, and payment dates can produce different interest.
• Fees and rounding: Fees are not included. The calculator rounds the payment to cents and multiplies that rounded figure by the selected number of months, so an account’s final payment can vary.
• Zero balance: A zero balance gives a zero modeled payment. For a positive balance, the selected term must be at least one month.

Use the result as a planning illustration, not as a statement payoff quote. For an exact payoff amount on a particular date, consult the card account’s current figures; interest can continue to accrue between a statement date and payment receipt.

Frequently Asked Questions

How do I calculate a monthly credit card payment?
Use the balance, monthly interest rate (APR divided by 12), and number of monthly payments in the amortization formula shown above. This calculator performs that calculation and rounds the payment to cents.

Does this calculator show my credit card minimum payment?
No. It estimates a fixed payment to repay a balance over the term you enter. Your account statement shows the required minimum, which is calculated under the card’s terms.

Why is the calculator’s result different from my statement?
The estimate assumes a fixed APR, regular monthly timing, and no new transactions or fees. Your account may use daily balance calculations, a changing rate, different balance categories, or other account-specific details.

Does paying more than the calculated amount reduce interest?
Under the model’s fixed-rate assumptions, paying more and reducing principal sooner would generally reduce the time interest accrues. This calculator does not model the timing or allocation of extra payments, so it cannot provide an exact revised payoff schedule.

What APR should I enter?
Use the APR that applies to the balance you are estimating, as shown in the relevant account disclosure or statement. If separate portions have different APRs, one rate may not accurately represent the full balance.

This result is an estimate, and the card issuer’s disclosure and account figures provide the exact amounts.

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in bal | Credit card balance | $ | 2000 | 0 | 100000000
in apr | Interest rate (APR) | % | 20 | 0.01 | 100
in yrs | Payoff term | years | 2 | 0.0833 | 50
out pmt | Monthly payment | $ | round(bal * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)), 2) | 2
out tot | Total of payments | $ | pmt * yrs * 12 | 2
out int | Total interest | $ | tot - bal | 2