Credit Card Payoff Calculator
Calculate how long it takes to pay off credit card debt and the total interest you will pay.
About the Credit Card Payoff Calculator
Credit card debt is the most expensive form of consumer credit most Americans will ever carry. The average US credit-card APR in late 2024 was about 21.5% per the Federal Reserve's G.19 release, and balances above $1.13 trillion nationally per the New York Fed's Household Debt and Credit Report (Q4 2024). The interest accrues daily on the average daily balance - there is no amortization schedule, no level payment, and no terminal date unless the borrower commits to one. This calculator finds that terminal date given a fixed monthly payment.
The Credit Card Accountability Responsibility and Disclosure Act of 2009 (Credit CARD Act, Pub. L. 111-24) reformed how issuers apply payments and disclose costs. Two CARD Act provisions matter for payoff planning. First, any payment above the minimum must be applied to the highest-APR balance first - so a borrower carrying both purchases and a higher-APR cash advance sees extra payments attack the costliest debt. Second, the monthly statement must disclose the payoff date if the borrower makes only minimum payments, and the monthly payment needed to retire the balance in three years. This calculator reproduces the second disclosure for any payment amount you choose.
The minimum-payment trap is the central insight. On a $5,000 balance at 22% APR, the first month's interest is $5,000 x 0.22/12 = $91.67. If the minimum payment is set at 2% of balance ($100), only $8.33 goes to principal in month one - and the next month the balance is $4,991.67, generating $91.51 of interest, against a $99.83 minimum payment that retires $8.32 of principal. Paying the minimum takes roughly 30 years and costs more than $7,000 in interest on the original $5,000. Doubling the payment to $200 cuts the payoff to 33 months and saves over $4,000 in interest.
The default scenario - $5,000 balance, 22% APR, $200 monthly payment - is the canonical "fixed payment, fixed term" payoff plan. This calculator iterates month by month, accruing interest on the declining balance and subtracting the chosen payment until the balance reaches zero, then reports months to payoff, total paid, and total interest.
How It Works
The credit card payoff calculator runs an iterative loop that mirrors the actual monthly statement cycle:
monthlyRate = APR / 12
Each month:
1. interest = balance x monthlyRate
2. balance = balance + interest
3. totalInterest = totalInterest + interest
4. payment = min(monthly_payment, balance) // last month pays only what is owed
5. balance = balance - payment
6. totalPaid = totalPaid + payment
7. months = months + 1
Stop when balance <= 0.
Sanity check: monthly_payment must exceed balance x monthlyRate
in the FIRST month, or the balance will never reach zero.For the default $5,000 balance at 22% APR with a $200 monthly payment: month one interest is $5,000 x 0.018333 = $91.67, new balance is $5,091.67, payment of $200 brings the balance to $4,891.67. Month two interest is $89.68, balance becomes $4,981.35, payment brings it to $4,781.35. The loop continues; after 33 months the balance falls below the $200 payment, the final payment is prorated, and the calculator reports a 33-month payoff with total interest of about $1,515.
The sanity check is critical. If the chosen payment does not cover the first month's interest, the balance grows rather than shrinks - the trap that drives multi-decade minimum-payment plans. The calculator rejects this case explicitly, telling the borrower the minimum payment required to make any progress at all.
Notice that the interest accrues on the declining balance, so each successive month's interest is slightly less than the previous month's. This is what makes the payoff curve nonlinear: the early months retire principal slowly because most of the payment is interest; the later months retire principal quickly because the balance is smaller. Doubling the payment does not halve the payoff time - it shortens it by more than half, because each dollar of extra principal in month one saves interest in every subsequent month.
Worked Examples
Default example: $5,000 balance, 22% APR, $200 monthly payment. Month one: interest $91.67, payment $200, principal retired $108.33, ending balance $4,891.67. The loop continues until the balance falls to zero. After 33 months the calculator reports a payoff in 2 years 9 months, total paid $6,517 (about $5,000 in principal and $1,517 in interest), with interest equal to 30.3% of the starting balance.
Double the payment to $400 and the payoff collapses to 15 months. Total paid is $5,733 (about $733 in interest). The extra $200/month in months one through fifteen saves $784 in interest and 18 months of debt. This is the avalanche effect: each dollar of extra principal in the early months saves interest in every subsequent month.
Minimum-payment scenario: at the typical 2%-of-balance minimum ($100 in month one), the calculator rejects the input because $100 does not cover the $91.67 in first-month interest plus any meaningful principal reduction. Even if the payment barely cleared interest - say $92 - the balance would shrink by less than $1/month, projecting a 30+ year payoff. The CARD Act requires issuers to disclose this in the monthly statement; this calculator lets you see the same math for any payment you choose.
Balance-transfer scenario: a $5,000 balance at 22% APR with a 12-month 0% introductory offer and 3% transfer fee. Enter balance = $5,150 (original balance plus $150 fee), APR = 0%, payment = $430/month. The calculator reports a 12-month payoff with zero additional interest - a $1,365 saving versus leaving the balance at 22%. Just commit to a payment large enough to retire the balance before the promotional APR expires.
When to Use This Tool
Use the credit card payoff calculator when you need to:
- Set a fixed monthly payment that retires a balance in a target timeframe (e.g., 24 or 36 months).
- Compare the total interest cost of a minimum-payment plan versus a fixed-payment plan.
- See how much an extra $50 or $100 per month shortens the payoff time and cuts total interest.
- Model a balance transfer to a 0% introductory APR and pick the payment needed to retire the balance before the promo expires.
- Decide between the avalanche method (highest-APR balance first) and the snowball method (smallest balance first) - this calculator shows the avalanche math directly.
- Project the payoff impact of a one-time bonus or tax-refund payment applied to principal.
- Reproduce the CARD Act payoff disclosure on your monthly statement for any payment you choose.
Limitations & Disclaimer
This calculator uses a monthly accrual approximation (APR / 12 x month-end balance). Actual issuer calculations use the average daily balance method per Reg Z (12 CFR §1026.14), which can differ by a few dollars per month depending on transaction timing. The calculator does not model promotional APRs that change mid-payoff, balance transfer fees, cash-advance APRs (which typically accrue from day one with no grace period), deferred-interest offers, or the CARD Act's allocation of payments above the minimum to the highest-APR balance. Real payoff timelines may vary by a few months. This tool is not financial, credit, or debt-management advice. See our disclaimer for full terms.
Frequently Asked Questions
How is credit card interest calculated?
Most US issuers use the average daily balance method: daily interest is the daily rate (APR / 365) times the average daily balance during the billing cycle, summed across the cycle. This calculator uses a simpler monthly approximation (APR / 12 x month-end balance) which is within a few cents of the issuer's figure for planning purposes. Reg Z (12 CFR §1026.14) and Reg DD (12 CFR §1030) define the exact methods for credit cards and deposit accounts.
What is the minimum-payment trap?
If the minimum payment does not cover the first month's interest, the balance grows rather than shrinks - and if it barely covers interest, payoff takes decades. On a $5,000 balance at 22% APR with a 2% minimum payment, the first month's interest is $91.67 and the $100 minimum retires only $8.33 of principal. The Credit CARD Act of 2009 (15 U.S.C. §1637) requires issuers to disclose the minimum-payment payoff timeline on every statement so borrowers see this trap clearly.
Does this calculator include balance transfer fees?
No. To model a balance transfer, add the transfer fee to the starting balance before running the calculator (e.g., $5,000 balance with a 3% fee becomes $5,150) and set the APR to the promotional rate. Issuers typically charge 3-5% of the transferred amount; the CARD Act requires this fee to be disclosed in the Schumer Box on the application.
What is the avalanche method and is it better than the snowball method?
The avalanche method pays off the highest-APR balance first, minimizing total interest. The snowball method pays off the smallest balance first, building psychological momentum. Mathematically, avalanche always wins on total interest paid; behaviorally, snowball wins on completion rates per a 2012 Northwestern Kellogg study. Use this calculator for the avalanche method on a single balance; for multiple balances, run it once per card.
Will making only the minimum payment ever pay off the card?
Eventually, yes - but it can take decades. The CARD Act requires issuers to set the minimum payment high enough to retire the balance in a reasonable period (typically including at least 1% of principal plus interest), so the balance will decline. On a $5,000 balance at 22% APR with a $100 minimum, the calculator rejects the input because $100 is barely above the $91.67 first-month interest; a $110 minimum would project to a payoff in roughly 28 years. The CARD Act statement disclosure will show the exact figure.
How does the grace period affect my payoff?
If you pay the statement balance in full every month by the due date, the issuer waives interest on new purchases - this is the grace period per Reg Z (12 CFR §1026.55). Once you carry a balance, the grace period disappears and interest accrues from the transaction date. To restore the grace period, pay the statement balance in full for one or two consecutive cycles. This calculator assumes you are already carrying a balance and accruing interest monthly.
Should I use a personal loan to consolidate credit card debt?
Sometimes. A $10,000 personal loan at 10% APR over 36 months costs $1,616 in interest, versus a $10,000 credit card balance at 22% paid off with $400/month over 32 months which costs about $2,750 in interest - a $1,134 saving. But origination fees on personal loans (1-8% of principal) eat into the saving, and a balance transfer to a 0% promotional card may be cheaper still. Run all three scenarios through this calculator and the APR calculator before deciding.
Last updated: September 9, 2026 · Author: HT99 Tools Editorial Team