Interactive financial calculator
Credit Card Payoff Calculator
Model a fixed credit card payment, calculate a payment for a target payoff date, or test a user-defined minimum-payment rule.
- Free to use
- No account required
- Inputs stay in your browser
Methodology & Assumptions
How this estimate is calculated
Monthly payoff model: nominal APR is divided by 12. Interest is added first, then the selected fixed, target-date, or user-defined minimum payment is applied. Payments are capped at the exact amount due, and the simulation stops at payoff or 1,200 months.
Illustrative result: figures are rounded for display after calculations use full numeric precision. Actual results may differ.
Currency: dollar symbols are a display convention. Enter every monetary amount in one consistent currency; the calculator does not convert currencies or apply jurisdiction-specific tax rules.
Three Ways to Estimate Credit Card Payoff
Fixed monthly payment calculates the payoff time from a planned payment and optional extra amount. Target payoff period calculates the fixed payment needed for a chosen number of months. Custom minimum-payment scenario simulates a user-defined percentage and currency floor because issuer formulas vary.
For a complete explanation of the timeline drivers, read How Long Does It Take to Pay Off a Credit Card?. For the difference between this monthly convention and issuer statement methods, read How Credit Card Interest Works.
Formula, Compounding, and Payment Timing
Klyrify uses deterministic monthly compounding from nominal APR ÷ 12. Interest is calculated on the opening balance and added first. The selected payment is then applied. No payment exceeds the amount due, and the exact final payment can be smaller than the normal monthly amount.
The model stops at zero balance or after a 1,200-month technical cap. A payment that does not exceed the first month's interest is reported as non-convergent. Values are calculated with full precision and shown to two decimals where payment accuracy matters.
Worked Example: Fixed Payment with Extra
For a $5,000 balance at 19.99% APR, a $200 planned payment plus $50 extra produces a combined $250 monthly payment. The simplified payoff takes 25 months, with $1,132.29 of total interest, $6,132.29 total paid, and a final payment of $132.29.
Without the $50 extra, the same balance and APR take 33 months and produce $1,521.02 of modeled interest. The extra-payment comparison is eight months shorter and $388.72 lower in modeled interest.
Worked Example: Target Payoff Period
Paying the same $5,000 balance at 19.99% APR over 24 whole months requires a calculated payment of $254.45. Total modeled interest is $1,106.91 and total paid is $6,106.91. Compared with an existing $200 payment, the target amount is $54.45 higher per month.
A one-month target includes one month of simplified interest. A first-payment date can translate the whole-month result into an illustrative payoff date, but it does not model statement closing dates or payment posting.
Worked Example: User-Defined Minimum Rule
With a $5,000 balance, 19.99% APR, a 2% percentage, a $25 currency floor, and $25 extra, the first simulated payment is $126.67. The payment is recalculated each month from the balance after interest. The scenario takes 137 months, produces $5,610.82 of modeled interest, and ends with a $21.67 final payment.
This is not an issuer default. It demonstrates a custom declining-payment rule selected by the user. Actual issuer formulas can include interest, fees, fixed amounts, percentages, and other terms.
How to Interpret the Result
Payoff time is a whole number of modeled monthly payments. Total paid equals starting balance plus modeled interest. Interest share is total interest divided by total paid. Annual milestones show the remaining balance after each completed year and at final payoff.
Extra-payment savings compare two otherwise identical fixed-payment scenarios. They are estimates, not guaranteed savings. If an extra payment interrupts essential spending or cash reserves, the calculator does not evaluate that trade-off.
Common Mistakes and Limitations
Do not enter APR as a monthly rate, assume every issuer uses APR divided by 12, continue new purchases while relying on a no-new-purchases estimate, or treat a declining minimum as a fixed payment. The calculator excludes daily balances, fees, grace periods, promotional expiry, balance transfers, cash advances, new purchases, penalty APRs, issuer allocation rules, collections, tax, credit scores, and country-specific law.
USD, CAD, and AUD change display formatting only. No conversion, live rate, bank data, account connection, lender quote, or issuer prediction is provided.
Frequently Asked Questions
Why does the calculator reject a payment equal to interest?
Under this model, that payment leaves principal unchanged. A smaller payment increases the balance, so neither produces a convergent payoff timeline.
Why can my statement interest differ?
Issuers may use daily balances, different cycle lengths, transaction dates, fees, multiple APR categories, and contractual rounding. Klyrify uses one simplified monthly balance and one APR.
Does the target payment guarantee payoff on that statement date?
No. It is a whole-month mathematical target under the entered assumptions. Actual statement timing and posting can differ.
Are my balance and payment included in a share link?
No. This calculator provides clean page links only. Inputs and outputs remain in the current browser and are not included in URLs or analytics.