Key Takeaways

  • The minimum payment is a percentage of the balance, so it declines as the balance declines. It is designed to keep an account current, not to retire it.
  • Because the payment falls alongside the balance, the principal reduction each month stays roughly proportional and the payoff stretches out over years rather than months.
  • A fixed payment is the entire fix. Holding the payment at the current minimum, rather than letting it fall, converts a decade-long payoff into a two or three year one.
  • Interest is charged on the balance, so the first month is the most expensive month, and every dollar of extra payment permanently removes its own future interest.
  • Total interest on a minimum-only payoff can approach or exceed the original balance. The calculator reports it as a share of the balance so the size is unmissable.
  • New purchases invalidate every projection. A payoff calculation assumes the account is not used again.

How Is a Credit Card Minimum Payment Calculated?

Card issuers use variants of the same formula: a small percentage of the statement balance, subject to a dollar floor, with the percentage typically low single digits. Some issuers instead take the interest and fees for the period and add a fixed percentage of the principal. Both produce the same behaviour, which is the part that matters: the required payment is a function of the balance, so when the balance falls, so does the payment.

Compare that with an installment loan, where the payment is fixed at the outset and never moves. On a loan, every dollar of principal repaid increases the share of the next payment that goes to principal, and the effect compounds toward a fixed end date. On a card, every dollar of principal repaid reduces the next required payment, and the effect works against the payoff instead of for it.

Both the percentage and the floor are inputs on this calculator rather than assumptions, because there is no industry-wide rule and the cardholder agreement is the only authority for a particular account. The percentage is the more important of the two: it has to exceed the monthly interest rate by a meaningful margin for the balance to move at all.

Card statements are required to carry a disclosure showing how long the balance would take to clear on minimum payments and what it would cost, alongside the payment that would clear it in three years. That box exists because the arithmetic below is counterintuitive enough to need stating on every bill.

How Card Interest Is Charged

Interest on a card is charged on the balance carried, at a daily or monthly periodic rate derived from the APR. This calculator uses the monthly form: the APR divided by twelve, applied to the balance once per statement period. A 21% APR is therefore 1.75% per month.

Two consequences follow. First, the first month is always the most expensive one, because the balance is at its largest, so any lump sum applied at the start does more than the same sum applied later. Second, the gap between the minimum percentage and the monthly rate is what determines whether progress happens at all. If a card charges 2% per month and the minimum is 2% of the balance, the payment covers the interest and almost nothing else, and the balance barely moves for years.

Paying the balance in full each month avoids interest on purchases entirely, through the grace period. Once a balance is carried, the grace period is typically lost until the account is paid in full again, so new purchases can begin accruing interest immediately rather than after a month. This calculator models a balance that is being repaid with no new purchases, which is the only case where a payoff date can be stated.

Credit Card Payoff Calculator

Enter the balance and rate, and the minimum payment terms from your own cardholder agreement. Adding a fixed payment shows both paths side by side.

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The balance

The amount currently carried on the card. Assumes no further purchases are made.

A hypothetical rate you supply, taken from your own statement. Enter 18 for 18%.

Minimum payment terms

From the cardholder agreement. Commonly a low single-digit percentage of the statement balance.

The dollar minimum that applies once the percentage falls below it. Enter 0 if the agreement sets none.

A fixed payment instead (optional)

The same amount every month regardless of the balance. Leave blank to model minimum payments only.

Worked Example: $2,000 at 18% APR

A $2,000 balance at 18% APR, with a minimum of 2% of the statement balance subject to a $25 floor.

Month one. The monthly rate is 18 divided by 12, which is 1.5%. Interest is $2,000 multiplied by 0.015, which is $30.00. The statement balance becomes $2,030.00. The minimum is 2% of that, which is $40.60, and that is above the $25 floor, so $40.60 is due. After paying it the balance is $1,989.40.

Read that carefully. A $40.60 payment reduced a $2,000 balance by $10.60. Three-quarters of it was interest.

Month two. Interest is $1,989.40 multiplied by 0.015, which is $29.84. The statement is $2,019.24, the minimum is $40.39, and the balance falls to $1,978.85. The payment has already gone down, and it will keep going down every month.

Run to zero, that path takes 182 months, which is fifteen years and two months, and costs $3,197.10 in interest on a $2,000 balance. The card charges 160% of the original balance in interest.

Now pay a flat $100 a month instead. The balance clears in 24 months with $395.64 in interest. Paying $59.40 a month more than the first minimum removes fourteen years and $2,801.46.

The reason the gap is so extreme is not that $100 is a large payment. It is that $100 stays $100 in month sixty while the minimum has fallen to something trivial by then. Fixing the payment is what does the work.

Common Mistakes and Misconceptions

  • Believing the minimum is the recommended payment. It is the contractual floor that keeps the account from going delinquent. It is not designed to retire the balance and does not do so on any reasonable timescale.
  • Continuing to use the card during the payoff. New purchases reset the arithmetic entirely. Every figure this calculator produces assumes no further spending on the account.
  • Paying the statement balance and expecting no interest. That works only if the balance was paid in full the previous month too. Once a balance is carried, the grace period is normally lost and new purchases start accruing immediately.
  • Assuming the APR is fixed. Most card rates are variable and move with an index. A rate increase lengthens the payoff, and a missed payment can trigger a penalty rate on top.
  • Letting the payment drift down with the minimum. Anyone who can pay the current minimum can keep paying that same amount next month. Holding the figure flat is the single highest-value change available, and it costs nothing extra today.
  • Ignoring the payoff amount. Interest accrues up to the date a final payment settles, so the amount that actually closes an account can exceed the printed statement balance.

What This Calculator Does Not Model

  • Any minimum payment formula other than the one entered. Issuers use several variants, including ones that add interest and fees to a percentage of principal. The percentage-plus-floor model here is the common form, and both parameters are inputs so the agreement's own figures can be used.
  • Fees. Annual fees, late fees, over-limit fees, cash advance fees and foreign transaction fees are all excluded. Only interest at the rate entered is charged.
  • Multiple balances at different rates. A card carrying a purchase balance, a cash advance balance and a promotional balance charges different rates on each and follows allocation rules for payments above the minimum. This models one balance at one rate.
  • Promotional and penalty rates. A rate that changes part-way through the payoff is better handled by the balance transfer calculator, which models exactly that.
  • Daily interest accrual. Interest is applied monthly here. Cards that accrue daily produce slightly different totals depending on when payments post within the cycle.
  • New purchases. The account is assumed to be dormant for the whole payoff.

What the Numbers Suggest Doing Next

The calculator produces four numbers that between them describe the whole situation, and each one implies a different next step.

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Interest in the first month. This is the running cost of the balance. Compared against the payment being made, it says immediately whether progress is possible: a payment close to that figure is buying almost nothing. It is also the number to compare against any alternative use of the same money, because it is a certain cost rather than an expected return.

The minimum-only payoff time. If this comes back in years rather than months, the account is not on a payoff path at all, and no ordering strategy or budgeting tweak changes that. The payment has to be fixed at a level above the minimum.

Interest as a share of the balance. When this exceeds 100%, the interest will cost more than the thing that was originally bought. That framing tends to be more useful than the dollar figure, because it converts an abstract total into a statement about the purchase.

The gap between the fixed payment and the first minimum. This is the actual monthly commitment being asked for, and it is usually far smaller than the size of the saving suggests. In the worked example above it is $59.40 a month to remove fourteen years.

Where several cards are involved, the ordering question becomes live, and the debt payoff planner handles it directly by comparing the snowball and avalanche orders across all of them at once. Where the balance carries a promotional rate that is about to end, or where a transfer offer is on the table, the balance transfer calculator prices the fee against the interest avoided. And where the minimum itself is not affordable, none of these tools is the right next step: the Consumer Financial Protection Bureau's guidance on what to do when card bills cannot be paid, linked below, describes options that arithmetic does not reach.

Frequently Asked Questions

How long does it take to pay off a credit card making only minimum payments?

Far longer than most people expect, because the minimum is a percentage of the balance and therefore shrinks as the balance shrinks. On the worked example on this page, a $2,000 balance at 18% APR with a 2% minimum takes 182 months, just over fifteen years, and costs $3,197.10 in interest. The exact figure depends on the APR and on the minimum payment formula in the cardholder agreement, both of which are inputs on this calculator.

Why does the minimum payment go down every month?

Because it is calculated from the statement balance rather than fixed at the outset. As the balance falls, the percentage applied to it produces a smaller required payment, so the amount going to principal falls too. The payment and the balance decline together, which is why the payoff stretches out. A fixed payment breaks the cycle: it stays the same while the balance falls, so an ever-larger share of it goes to principal.

How much interest does a credit card charge each month?

Interest is charged on the balance carried at a periodic rate derived from the APR. This calculator uses the monthly form, which is the APR divided by twelve, so a 21% APR charges 1.75% per month. Many issuers instead apply a daily periodic rate to an average daily balance, which produces a similar but not identical figure. The first month is always the most expensive one, because that is when the balance is largest.

Is paying more than the minimum worth it?

Yes, and the effect is much larger than the extra amount suggests, because the additional money goes entirely to principal and therefore removes its own future interest for every remaining month. On the worked example on this page, paying a flat $100 instead of the shrinking minimum costs $59.40 more in the first month and removes fourteen years and $2,801.46 of interest from the payoff.

What is the three-year payoff box on my credit card statement?

Card statements are required to disclose how long the balance would take to clear if only minimum payments were made, what that would cost in total, and the fixed monthly payment that would clear it within three years. It exists because the minimum-payment arithmetic is counterintuitive enough that regulators concluded it needed stating on every bill. The three-year payment in that box is a useful target to enter as the fixed payment in this calculator.

Does paying off a card in full each month avoid interest?

On purchases, yes, through the grace period, provided the balance was also paid in full the previous month. Once a balance is carried the grace period is normally lost until the account is paid in full again, so new purchases can begin accruing interest immediately rather than after a billing cycle. Cash advances generally have no grace period at all and often carry a higher rate.

Should I pay off the card with the highest rate or the smallest balance first?

That question only arises with more than one card, and this calculator handles a single balance. The debt payoff planner on this site runs both orderings across all of your cards on the same monthly budget and reports the difference in total interest and payoff date, which is a more useful answer than a general rule because it uses your actual balances and rates.

Does this calculator include fees or a promotional rate?

No. It charges interest at the single rate entered and applies no annual fee, late fee, over-limit fee, cash advance fee or foreign transaction fee. It also holds the rate constant for the whole payoff, so it does not represent a promotional rate that expires or a penalty rate triggered by a missed payment. A balance moving between two rates is better modelled with the balance transfer calculator.

What happens if I keep using the card while paying it down?

Every projection here becomes invalid. The calculation assumes the account is not used again, so new purchases add to the balance being repaid and, because the grace period is normally lost once a balance is carried, they can start accruing interest straight away. A card that continues to be used is not being paid off; the balance is being cycled.

Is my balance or card information sent anywhere?

No. Everything is computed in the browser from the numbers typed into the form. Nothing is transmitted to Swoopr Investment, to a card issuer or to any third party, and nothing is stored between visits. The calculator never asks for and must never be given an account number, and it has no connection to any real account.

References

Every source above was retrieved and its document title confirmed on 23 August 2026. Rules, disclosure requirements and product terms change, so a figure taken from any of them should be re-checked against the current version before it is relied on. Swoopr Investment quotes no rate, fee or product term as a current fact anywhere on this page: every rate, fee and term in the calculator is a value the reader supplies.