Credit Card Payoff Calculator

How to use this calculator#

1. 1
   Enter the statement balance, not the credit limitUse the balance you are actually carrying. If you have several cards, run each one separately — the highest-APR card is where every spare dollar should go first, and averaging the rates hides that.
2. 2
   Use the purchase APR from your statementCash advance and balance transfer APRs are usually higher and start accruing immediately with no grace period. If your balance is a mix, model the expensive slice on its own.
3. 3
   Enter a payment you will actually make every monthA fixed payment is what makes payoff finite. Paying the shrinking minimum instead means the payment falls as the balance falls, which is precisely why minimum-only repayment takes decades.
4. 4
   Check the first-month interest figureThe tool shows the interest charged in month one — $95.42 on this example. Only the amount you pay above that reduces the balance. Pay less than it and the debt grows no matter how disciplined you feel.
5. 5
   Stop spending on the card while you model itThe projection assumes no new purchases. A payoff plan that runs alongside continued spending on the same card is not a payoff plan, it is a slower version of standing still.

The formula#

Why card interest bites so hard#

Card interest is normally charged daily on the average daily balance at APR divided by 365, then billed monthly, so it effectively compounds. A 5,000 balance at 22.9% accrues roughly 95 of interest in the very first month. Paying 150 a month clears it in about 54 months and costs around 3,020 in interest — some 60% of what you originally borrowed, on top of repaying the balance itself.

Raising that payment to 250 cuts the term to 26 months and the interest to roughly 1,360. Because only the portion above the monthly interest charge reduces the balance, every extra unit works far harder than it appears: that additional 100 a month saves about 1,660 here, and the saving grows with the rate.

The minimum payment trap#

Minimums are typically 1-3% of the balance or a small floor amount, deliberately structured so most of the payment covers interest. If your payment is equal to or below the monthly interest charge, the balance never falls and payoff is mathematically impossible — this calculator flags that case rather than printing an absurd number. Even a payment slightly above interest can take decades to clear.

Faster ways out of card debt#

A 0% balance transfer buys 12-24 interest-free months for a fee near 3%, but it only helps if you clear most of the balance before the promotional rate expires. With several cards, the avalanche method — minimums everywhere, everything spare at the highest APR — costs least, while the snowball method of killing the smallest balance first builds momentum. Ringing your issuer to request a lower rate is free and works more often than people expect.

Worked examples#

Reference tables#

Common mistakes#

• Paying the minimum because it is the number printed on the statementA typical minimum of 1% of the balance plus interest starts at $145.42 on this $5,000 balance and then shrinks every month as the balance falls. That structure stretches payoff to 199 months — over 16 years — and costs $8,018 of interest. Paying that same $145.42 as a fixed amount clears it in 57 months instead.
• Making a payment at or below the monthly interestAt 22.9% on $5,000, interest is $95.42 a month. A $95 payment leaves the balance higher than it started. The calculator refuses to print a payoff date in this case rather than showing an absurd number, and the fix is always a bigger payment, never more patience.
• Taking a balance transfer and then relaxingA 3% fee on $5,000 is $150 and buys, say, 18 interest-free months — a genuine bargain against the $1,141 of interest the same 18 months would otherwise cost. But clearing $5,150 in 18 months needs $286.11 every month. Miss that and the residual balance reverts to a rate that is often higher than the one you left.
• Continuing to spend on the card being paid downNew purchases usually lose the interest-free grace period entirely once a balance is carried, and payment allocation rules mean money above the minimum goes to the highest-rate portion first — so a promotional balance can sit untouched while you pay interest on groceries.

Frequently asked questions#

Key terms#

APR (annual percentage rate)

The yearly interest rate on the card. Divide by 12 for the monthly periodic rate, or by 365 for the daily rate most issuers actually apply.

Average daily balance

The base most issuers charge interest on: the balance on each day of the cycle, averaged. It is why paying mid-cycle helps a little and paying more helps a lot.

Grace period

The window in which paying the statement balance in full avoids interest on purchases entirely. Carrying a balance normally suspends it until you clear the card.

Minimum payment

The smallest amount that keeps the account current — typically 1–3% of the balance, or a percentage plus interest, subject to a small floor. Designed to keep the debt alive, not to end it.

Balance transfer

Moving a balance to a card offering 0% for a promotional window, usually for a fee of 2–5% of the amount moved. Only worth it if most of the balance clears before the window closes.

Avalanche vs snowball

Avalanche pays the highest APR first and costs the least in interest. Snowball pays the smallest balance first and produces quicker visible wins. Avalanche is cheaper; snowball is more often finished.

Sources#