How to use the credit card payoff calculator
Grab your latest statement. You need the balance you want to clear and the purchase APR that applies to it. If part of the balance sits on a different rate, such as a cash advance, run that part separately.
Enter a payment you can keep up every month, not your best month. Leave new charges at zero for a clean plan. If you know you'll keep using the card, put in a realistic monthly amount so the result shows what that costs you.
- Enter your statement balance and regular purchase APR.
- If you have a 0% or low intro rate, enter that APR, the months left on it and any balance transfer fee.
- Enter your monthly payment and any extra amount you'll add every month.
- Add new monthly charges or a monthly account fee only if they'll really happen.
- Pick a target, such as 24 or 36 months, to see the payment that hits it.
- Choose monthly (APR / 12) or daily-compounding interest, then press Calculate and read the schedule.
Example: paying off $4,500 at 22.9% APR
Say you owe $4,500 at 22.9% APR, with no intro rate, no fees and no new charges. Paying $200 a month clears it in 30 payments. You pay about $1,436.05 in interest and $5,936.05 in total. The last payment is only $136.05.
Look at what a bigger payment buys you. Going from $150 to $200 a month cuts 15 payments and about $807 of interest. Going from $200 to $300 saves another 12 payments. The table changes only the payment, so the comparison is fair.
| Monthly payment | Payments to zero | Total interest | Total paid |
|---|---|---|---|
| $150 | 45 | $2,243.25 | $6,743.25 |
| $200 | 30 | $1,436.05 | $5,936.05 |
| $250 | 23 | $1,065.99 | $5,565.99 |
| $300 | 18 | $852.12 | $5,352.12 |
Credit card payoff formula
Each modeled month starts with last month's balance, adds a month of interest plus any new charges and fees, then subtracts your payment. The calculator repeats that until the balance hits zero, and the final payment only covers what's left.
If nothing changes from month to month, you can get the same answer in one step with the payoff-time formula below. For the $4,500 example, r is 0.229 / 12 and the formula gives 29.7 months, which rounds up to 30 payments. Once intro rates, fees or new charges are involved, the month-by-month ledger is the only honest way to do it.
Monthly rate r = APR / 100 / 12New balance = old balance + interest + new charges + monthly fee - paymentMonths to payoff n = -ln(1 - r x balance / payment) / ln(1 + r)Transfer fee = balance x transfer fee percentage
How credit card interest is calculated
Most issuers charge interest daily. The CFPB explains that they divide the APR by 365 to get a daily rate, then apply it to your average daily balance for the billing cycle. Your statement shows the method your card uses.
This calculator gives you two options. The monthly method uses APR / 12, so the first month on $4,500 at 22.9% costs about $85.88 in interest. The daily-compounding option uses APR / 365 compounded over an average month, which lifts total interest in the example from $1,436.05 to $1,455.38. Neither one knows your real posting dates, so compare the first month with your statement.
What payment pays off a card in 12, 24 or 36 months?
Enter a target and the calculator finds the smallest monthly payment that clears the balance in time. It keeps everything else the same: balance, APR, intro offer, fees and new charges. Round the answer up to a whole dollar so daily interest doesn't leave a small balance at the end.
A longer target lowers the payment but raises the interest bill. For the $4,500 example, stretching from 24 to 60 months saves about $109 a month but adds roughly $1,945 of interest.
| Target | Monthly payment | Approximate interest |
|---|---|---|
| 12 months | $423.13 | About $578 |
| 24 months | $235.46 | About $1,151 |
| 36 months | $173.96 | About $1,763 |
| 48 months | $143.99 | About $2,411 |
| 60 months | $126.60 | About $3,096 |
Balance transfer and 0% APR payoff
A 0% transfer can save a lot, but the fee is added to your debt on day one and the regular APR kicks in on whatever is left when the offer ends. The calculator adds the fee, uses the intro rate for the months you enter, then switches to the regular APR. It also tells you the payment that clears the balance before the offer runs out.
Move the $4,500 with a 3% fee and you start at $4,635. At 0% for 12 months and then 22.9%, a $200 payment finishes in 25 payments with about $303.05 of interest. Pay the same $200 at 22.9% from month one and it takes 31 payments and about $1,542.40. Check whether your offer is true 0% or deferred interest, because deferred interest can be charged back.
| Rate | Starting balance | Payments | Interest |
|---|---|---|---|
| 0% for 12 months, then 22.9% | $4,635.00 | 25 | $303.05 |
| 22.9% from the first month | $4,635.00 | 31 | $1,542.40 |
New charges and minimum payments
Every dollar you add to the card has to be paid back too, and it can pick up interest along the way. Keep paying $200 on the $4,500 example but add $25 of new charges a month and payoff moves from 30 to 36 payments. Add $50 a month and it takes 45 payments, with $8,993.25 paid in total.
This calculator keeps your payment fixed. Your card's required minimum usually shrinks as the balance falls, which is why paying only the minimum can take far longer than any fixed plan here. Issuers use different minimum formulas, so treat the minimum as a floor and pick a fixed amount you can stick to.
Limits and when to double-check
The result is a planning estimate. It models one balance with one active APR at a time, a fixed payment, and the same charges and fees every month. Real statements can differ because of exact posting dates, cycle length, several APR buckets, variable rates, penalty rates and rounding. If your payment can't cover interest and new charges, the calculator stops and asks for a higher amount.
Before you commit to a plan, check these on your statement and card agreement.
- Which balances carry which APR, and whether the APR is variable
- The intro rate end date, the rate after it, and whether it's deferred interest
- The transfer fee, its minimum or maximum, and the transfer deadline
- The minimum payment and the 36-month payoff figure on your statement
- Late, annual and monthly fees that this plan doesn't include
Sources
These official references explain how card interest, statement disclosures, promotional offers and payment allocation work. They don't review any single card or plan.