Credit Card Payoff Calculator
Find out how long a credit card balance actually takes to clear, what the interest costs along the way, and whether a balance transfer with a fee and a promotional rate genuinely saves money once the fee is counted. The calculator also shows what paying only the minimum would do, which is usually the most persuasive number on the page.
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EstimateThis calculator provides estimates for educational and informational purposes only. It does not constitute financial, investment, legal, accounting, or tax advice. Results are based on the assumptions and information entered and may differ materially from actual outcomes. Tax rules and financial regulations can change. Consult an appropriately qualified professional for advice specific to your situation.
Interest is compounded monthly here. Most card issuers compound daily, which makes real interest slightly higher than shown. No late fees, annual fees or penalty rates are modelled.
- Months to zero and total interest at a fixed payment you choose.
- The minimum-payment comparison, using the declining formula issuers actually apply.
- Balance transfers modelled properly: the fee, the promotional rate, the promotional length and the go-to rate.
- Additional cards can be added to see when everything is clear, paid highest rate first.
How credit card interest actually works
Card interest is charged on the average daily balance and compounds daily. Your APR is converted to a daily periodic rate by dividing by 365, applied to each day's balance, and the result is added at the end of the cycle.
daily rate = APR ÷ 365 daily charge = balance that day × daily rate monthly charge ≈ average daily balance × APR ÷ 12
This calculator uses monthly compounding, which is close enough for planning and slightly understates real interest. On a $6,400 balance at 23.9%, monthly compounding gives about $127 of interest in the first month; daily compounding gives roughly $129. Over a multi-year payoff the difference accumulates to a modest amount, always in the issuer's favour.
Two features of card interest are worth knowing because they change behaviour:
- The grace period. If you pay the statement balance in full every month, purchases usually carry no interest at all. Carry any balance and the grace period is typically lost, meaning new purchases start accruing interest from the day they post until you are back to a zero balance for a full cycle.
- Cash advances have no grace period, usually carry a higher APR, and often a fee. They begin accruing interest immediately.
Why the minimum payment takes so long
A minimum payment is typically defined as a percentage of the balance — commonly 1% to 3% — plus that cycle's interest and fees, subject to a floor of around $25 to $35.
The problem is the percentage. As the balance falls, the required payment falls with it, so the amount going to principal shrinks throughout. The payoff extends dramatically.
| Approach on a $6,400 balance at 23.9% | Time to clear | Interest paid |
|---|---|---|
| Minimum only (1% + interest, $25 floor) | Well over a decade | Several thousand dollars |
| Fixed $191 a month (the starting minimum, held constant) | About 4 years | Far less |
| Fixed $300 a month | About 2 years | Less again |
Run your own figures above for the exact numbers. The pattern is the point: holding the payment constant as the balance falls is the single most effective change available, and it costs nothing extra in month one.
Card statements are required to show what paying only the minimum would cost and how long it would take. It is worth finding that box on your next statement — it is usually more motivating than any calculator.
Balance transfers: when they work and when they do not
A balance transfer moves a balance to a new card offering a promotional rate — often 0% — for a fixed period, usually in exchange for a fee of 3% to 5% of the amount transferred.
The arithmetic is straightforward. On $6,400 with a 3% fee, the transfer costs $192 immediately and the balance becomes $6,592. At 0% for 18 months, paying $367 a month clears it exactly within the promotional window, and the total cost is the $192 fee. Staying on the original card at 23.9% and paying $367 a month would cost roughly $1,300 in interest. The transfer saves around $1,100.
But the calculation reverses if the balance is not cleared in time. Whatever remains when the promotion ends is charged at the go-to rate, which is often higher than the rate you left. The calculator models this: enter the promotional length and the go-to APR, and it shows what happens on both sides of the boundary.
What a calculator cannot tell you, and what decides whether this actually works:
- You may not be approved, and if you are, the credit limit may be lower than the balance you want to move.
- New purchases on the transfer card are often not covered by the promotional rate, and payment allocation rules can mean your payments clear the 0% balance first while the purchase balance accrues interest.
- Some offers end the promotion early if you miss a payment.
- Transfers between cards from the same issuer are usually not permitted.
- Opening a new account affects your credit file, and the freed-up limit on the old card is a genuine temptation.
A transfer is a rate reduction, not a debt reduction. It works when it is paired with a plan to clear the balance inside the promotional window.
Working with several cards
Add extra cards under Advanced and the calculator switches to a combined plan, targeting the highest APR first with whatever you can pay above the minimums. That is the avalanche method, and it is the cheapest ordering.
If you want the full comparison — including the snowball, the per-card payoff dates, and the interest each card costs you — the Debt Avalanche and Debt Snowball calculators handle multiple debts of any kind, not just cards.
Ways to lower the rate before committing to years of it
Before settling into a long payoff at 24%, it is worth an hour on the alternatives:
- Ask for a lower rate. Unglamorous and often effective, particularly with a good payment history. A single phone call costs nothing and issuers do sometimes reduce rates to retain a customer.
- A credit union personal loan. Frequently priced well below card rates, with a fixed term that forces the balance down rather than letting it linger. Model it in the Personal Loan calculator including any origination fee.
- A balance transfer, as above, if the balance can realistically be cleared in the window.
- A non-profit credit counselling agency. If the balances are genuinely unmanageable, a reputable non-profit agency can sometimes negotiate reduced rates through a debt management plan. Be careful here: the field contains both legitimate non-profit counsellors and expensive for-profit "debt settlement" operations, which are a very different thing with serious consequences for your credit file.
Common mistakes
Continuing to use the card. Every projection here assumes no new purchases. Spending on a card you are paying down is the main reason real payoff takes far longer than any calculator predicts.
Paying the minimum plus a little, rather than a fixed amount. Anchoring to a shrinking minimum undoes most of the benefit. Pick a number and keep it.
Assuming a transfer is free. The 3%–5% fee is real money paid up front, and it is included in this calculator's comparison for exactly that reason.
Making purchases on a transfer card. They often sit outside the promotion and accrue interest while your payments go to the promotional balance.
Closing the old card immediately after a transfer. It reduces your available credit, raising utilisation and potentially lowering your score at exactly the moment you might want to apply for something else.
Frequently asked questions
At a fixed payment, that is what this calculator returns from your balance, APR and payment amount. The pattern that matters is the difference between a fixed payment and the shrinking minimum: on a typical balance the fixed payment can clear the card in a third of the time or less, for a fraction of the interest.
It is worth it when the interest avoided exceeds the transfer fee, which usually means clearing most or all of the balance inside the promotional window. Enter the fee, promotional rate, promotional length and go-to rate above and the calculator compares the total cost of both routes including the fee. If the balance would still be substantial when the promotion ends, the answer is often no.
Because most of the payment is going to interest. At 23.9% APR, a $6,400 balance accrues about $127 of interest in a month. If the minimum is $191, only $64 reduces the balance — about 1% of it. Anything above the interest charge is what actually makes progress, which is why increasing the payment has such a disproportionate effect.
A common sequence is a small starter reserve first — often around one month of essential expenses — then attack the card hard, then build the full emergency fund. The reasoning is that with no cash at all, the next unexpected expense goes straight back on the card. Beyond that starter amount, holding cash earning 4% while paying 24% on a card costs you money every month. The Emergency Fund calculator helps size the reserve.
Usually yes, and often noticeably. Credit utilisation — the share of your available credit in use — is a significant scoring factor, and it falls as balances drop. Keeping a paid-off card open and unused generally helps more than closing it, because closing reduces your total available credit. Payment history remains the largest factor, so paying on time throughout matters most.
The balance clears eventually on most cards, but it can take well over a decade and cost more in interest than the original purchases. In some situations — a very low minimum percentage against a high APR — the required payment barely exceeds the interest and the balance falls at a crawl. The calculator detects the extreme cases and says so rather than producing a misleading number.
It can be, if it genuinely lowers your rate and the cards then stay at zero. A consolidation loan converts revolving debt into an instalment loan with a fixed end date, which many people find easier to finish. The risk is that the cards, now empty, get used again — leaving both the loan and new balances. Model any offer in the Personal Loan calculator including the origination fee before deciding.