Credit Card Payoff Calculator: how long to pay off, and what it costs

TL;DR: Enter your balance, APR and a fixed monthly payment (or target payoff date) to see how long you’ll take to clear the card and what you’ll pay in interest. The smartest play is to lock a fixed extra payment and prioritize your highest‑APR debt first.

What this calculator tells you

This payoff calculator answers four questions immediately:

• How many months until you are debt‑free at your current payment level.
• The total interest you’ll pay along the way, based on your card’s APR.
• Your estimated payoff date.
• How faster or larger payments change both time and interest.

You can also display a month‑by‑month schedule that shows how much of each payment goes to interest vs. principal and how your remaining balance trends toward zero. If you’re comparing strategies — fixed payment vs. target date, or avalanche vs. snowball — the schedule makes the trade‑offs visible.

Two constraints matter in credit card math:

1. Interest accrues daily using a daily periodic rate equal to APR ÷ 365, applied to each day’s balance, then summed for the statement cycle. That’s why the payment you make today stops tomorrow’s interest from compounding on that slice of balance (CFPB, June 2026).
2. You lose your grace period on purchases when you carry a balance. New spending typically starts accruing interest right away until you’ve paid the statement balance in full by the due date (CFPB, June 2026).

If variable APRs or rate hikes worry you, remember that purchase APRs move with benchmarks and issuer margins; re‑run the calculator when your statement rate changes (Federal Reserve, July 2026).

How the payoff math works (plain English)

Here’s the structure our calculator uses under the hood.

1. Convert the APR into a daily periodic rate (DPR): APR ÷ 365.
2. For each day in the billing cycle, apply DPR × prior day’s balance to get that day’s interest. Sum for monthly interest.
3. Add monthly interest to the balance at statement cut.
4. Subtract your payment on the due date. If your fixed payment would overpay in the final month, we cap it at the remaining balance plus accrued interest.

Because credit card interest compounds daily, earlier and larger payments reduce total interest disproportionately: every dollar you remove today is a dollar that stops generating tomorrow’s interest. That simple lever — paying more, sooner — dominates everything else.

First‑person example: When I was carrying a single card balance during grad school, setting a fixed $200 monthly transfer the day my paycheck landed made the interest curve flatten fast. I didn’t chase the “perfect” number — I automated a realistic one and let math do the rest.

If your issuer uses 360 instead of 365 days for DPR, your results will differ slightly, but the direction is identical: bigger payments and fewer days in balance equal less interest (FCA, May 2026).

Minimums vs. fixed payments: pick a side

Minimum payments are designed to keep the account current, not to pay it off. They float with balance and often include interest plus a small principal slice. Two problems follow:

• Time stretches: as your balance falls, the minimum shrinks, so you never accelerate.
• Cost rises: paying mostly interest early means you carry principal for longer.

A fixed extra payment — an amount you commit to every month above the minimum — flips both problems:

• Time compresses: the same fixed payment becomes a larger share of principal as the balance falls, accelerating payoff.
• Cost drops: you remove principal earlier, so future interest is calculated on a smaller base.

If you want the lowest interest cost, don’t let the minimum payment dictate your plan. Choose a fixed monthly target that you can sustain through an average month. If cash flow varies, anchor on a minimum‑viable fixed amount and add occasional top‑ups (tax refund, bonus, small windfalls) to cut extra months.

For readers who want a structured approach across multiple cards, the debt avalanche wins on math: rank your debts by APR, pay the minimum on all, and put every extra dollar on the highest APR until it’s gone, then roll the freed‑up payment to the next highest APR. It strictly minimizes total interest vs. any alternative ordering. If momentum matters more to you than dollars, the snowball (smallest balance first) can be the better behavioral pick — but understand you’re paying for motivation with extra interest.

Related reading within our site:

• How card issuers calculate interest, daily rates and grace periods: see our explainer in How credit card interest is calculated.
• Strategy trade‑offs explained: Debt avalanche vs. debt snowball.
• If you’re overwhelmed and want a master plan: Complete guide to getting out of debt.
• Considering a promo to buy time: start with Balance transfer credit cards explained and compare options against a bare fixed‑payment plan.

Choose inputs you can live with

Three inputs drive your results.

1. Balance: Use the latest statement balance if you’ve stopped spending on the card, or the current balance if you’re still transacting. If you continue to spend, your payoff date will slip.

2. APR: Enter the purchase APR on your statement. If your card lists multiple APRs (purchase, cash advance), stick to the purchase APR for regular spending. If your APR is variable, treat the result as a snapshot and re‑run monthly when your statement posts (CFPB, June 2026).

3a) Payment: Fixed dollar amount you will send every month. Higher is always better for time and cost.

3b) Or target date: If you have a date in mind (say 18 months), the calculator will back‑solve the needed monthly payment. Sanity‑check it against your budget; if it’s unrealistic, pick the next workable milestone.

Interpreting outputs:

• Months to payoff: total number of payments until the balance reaches zero.
• Total interest: sum of monthly interest across the timeline.
• Payoff date: month and year you’ll be debt‑free at this payment level.
• Schedule: each row shows starting balance, interest charged, principal repaid and ending balance for the month.

Sensitivity testing you should try:

• Add $25–$100 to your monthly payment and watch total interest fall sharply. That’s the compounding in reverse.
• Move your payment earlier in the cycle (for example, two weeks before the due date) so fewer days accrue interest before the next statement.
• If you must keep using the card, split your budget: pay off last month’s statement balance in full to restore a grace period on new purchases, and keep a separate payoff plan for the old balance.

When a balance transfer or consolidation helps

Two tools can speed up payoff — if used with discipline.

1. Balance transfer cards: A 0% intro APR gives you a window to attack principal without interest. But transfers usually charge a fee (often 3%–5%), and the promo expires. Compare the fee and remaining promotional term to your fixed‑payment path. If a transfer shaves many months and you can clear the balance within the promo period, it’s worth it. If not, a transfer risks merely delaying interest and adding fees (CFPB, June 2026).

2. Personal loan for consolidation: A fixed‑rate installment loan can lower your APR and force a set end date. It also removes daily compounding from the equation. But approval depends on credit, and you must not reuse the freed‑up credit card limit — or you’ll end up with both a loan and new card balances. If you consolidate, cut card spending to essentials and automate the loan payment.

Internal guides to help you evaluate options:

• Pros, cons and best‑fit lenders: Best debt consolidation loans 2026.
• If you decide to refinance student debt instead: Best student loan refinance lenders 2026.
• Prefer to stay within card products: Best balance transfer credit cards 2026.

Key takeaways

• Daily compounding means earlier, larger payments cut interest fastest (CFPB, June 2026).
• Don’t float with minimums; lock a fixed monthly target and automate it.
• For multi‑debt plans, avalanche (highest APR first) minimizes total interest.
• Pause new spending or restore your grace period by paying statement balances in full.
• Consider balance transfers or consolidation only if the fees and timeline beat a disciplined fixed‑payment path.

FAQ

How accurate are the results if my APR changes?

Treat each run as a snapshot. Variable APRs move with benchmarks and issuer margins; when your statement APR updates, re‑run the numbers (Federal Reserve, July 2026).

Does the calculator include transaction fees or annual fees?

By default, no. If your card charges an annual fee or you’re planning a balance transfer with a 3%–5% fee, add that cost to your balance first so the payoff schedule reflects it.

Is it better to target a date or a fixed payment?

Both are valid. Target‑date back‑solving is helpful for short deadlines; fixed payments are easier to automate and sustain. If you’re unsure, pick the highest fixed monthly amount you can reliably make — and add occasional top‑ups.

Will closing my card after payoff help?

Usually, no. Closing can reduce available credit and hurt your utilization ratio, a key input to credit scores. Keep the card open and use it sparingly for small purchases you pay in full.

Should I pay mid‑cycle instead of just on the due date?

If cash is available, yes. Paying earlier reduces average daily balance and the interest that accrues before statement cut. Even splitting one monthly payment into two can shave interest.

Ending the debt is an optimization problem with one correct answer: automate the highest sustainable fixed payment and point it at your highest‑APR balance until it’s gone. Everything else is noise. Use the calculator as your scoreboard, not your steering wheel.