How long will it take to pay off your credit card — and how much will you pay in total interest?
This tool is for: Credit card holders who want to know their exact payoff date at their current payment level · People deciding how much to pay each month to escape their balance by a target date · Anyone comparing the real cost of carrying a credit card balance vs paying it off aggressively
- Exactly how many months until your balance reaches zero at your current payment
- The total interest you will pay over the life of the balance
- The full cash outflow — original balance plus all interest
Formulas Used
Monthly Interest on Credit Card Balance
I_monthly = B * (APR / 12 / 100)
Where: I_monthly = Interest charged in the current billing cycle (USD), B = Current outstanding balance (USD), APR = Annual percentage rate as stated by the card issuer (%)
Source: Consumer Financial Protection Bureau — Credit Card Interest ✓ Verified
Fixed-Payment Payoff Time (Closed Form)
n = ceil( -ln(1 - B*r/P) / ln(1+r) )
Where: n = Number of months until balance reaches zero (months), B = Current balance (USD), r = Monthly periodic rate (APR / 12 / 100) (decimal), P = Fixed monthly payment (USD)
Source: Standard amortization formula — applies to any fixed-payment revolving debt ✓ Verified
Key Insight
On a $3,000 balance at 19.99% APR, paying a fixed $100/month clears the debt in about 42 months. Paying only the minimum (declining as the balance drops) can stretch repayment past 15 years and triple the total interest — the most common and most costly credit card mistake.
Frequently Asked Questions
Why does paying only the minimum take so long?
Credit card minimum payments are typically 1–3% of the balance or a flat $25–$35, whichever is greater. As you pay down the balance, the minimum shrinks — which means less and less of each payment goes toward principal. On a $3,000 balance at 20% APR, the minimum might start at $75 and fall below $30 within two years. Because the payment tracks the balance down, you are always just barely outpacing interest. A fixed payment at any amount above the starting minimum will pay off the debt dramatically faster because the payment stays the same while the interest portion shrinks each month.
What is a typical credit card APR?
As of 2025–2026, the average credit card APR in the United States ranges from approximately 20–29% for standard purchase rates, according to Federal Reserve G.19 data. Rewards cards and cards for borrowers with excellent credit (750+) typically range from 18–22%. Cards targeted at fair-credit or subprime borrowers can exceed 28–30%. Retail store cards often carry 26–30%+ APRs. Promotional 0% APR periods are common for balance transfers and new card sign-ups but revert to the standard rate after 12–21 months. Use your actual APR from your statement for the most accurate calculation.
How is monthly credit card interest calculated?
Most card issuers use the Average Daily Balance method with daily compounding: the daily periodic rate (APR / 365) is applied to your balance each day, and interest accumulates daily. The total interest charged in a billing cycle is the sum of all daily interest charges. This calculator uses monthly compounding (APR / 12), which produces a slightly lower estimate than daily compounding. The difference is small — for a $3,000 balance at 20% APR, monthly compounding charges roughly $50 per month while daily compounding charges approximately $50.14. For planning purposes, both methods give effectively the same payoff timeline.
Does paying earlier in the month save interest?
If your card uses the Average Daily Balance method (most do), paying earlier in the billing cycle does reduce interest slightly because the payment lowers your daily balance for more days in the cycle. Paying on day 5 of a 30-day cycle rather than day 25 means your balance is lower for 20 extra days. The savings are modest — a few cents to a couple of dollars per month — but they compound over time. The bigger lever is the amount you pay, not the timing. Paying $25 more per month has far more impact than paying the same amount 2 weeks earlier.
About This Calculator
Sources:
- Consumer Financial Protection Bureau — How is credit card interest charged? — Monthly interest calculation methodology and APR definition
- Federal Reserve — Consumer Credit (G.19 Release) — Reference range for current credit card interest rate benchmarks
Limitations:
- Assumes monthly compounding — many credit cards actually compound daily using the Average Daily Balance method, which can increase actual interest slightly compared to this estimate
- Assumes no new purchases, cash advances, or balance transfers are added to the card during the payoff period
- Assumes a fixed APR for the entire payoff period — variable-rate cards and penalty APRs will produce different results
- Does not include annual fees, late payment fees, foreign transaction fees, or other card charges
When to consult a professional: If total credit card debt exceeds 20% of gross annual income, or if you are considering debt consolidation, balance transfer strategies, or formal debt restructuring
This calculator estimates credit card payoff time and total interest based on a fixed APR and constant monthly payment. It is for planning and educational purposes only and does not constitute financial advice. Actual results depend on whether you add new charges, whether your APR changes, and the compounding method used by your card issuer.