Debt Payoff Calculator
Find out how long it takes to clear a debt and what it costs in interest from your balance, APR, and monthly payment.
Example
Say you owe $5,000 on a card at 18% APR and pay $200 every month. The monthly rate is 18% ÷ 12 = 1.5%, so the first month's interest is $75 — well under your $200 payment, so the balance shrinks each month.
Paying it down month by month, the debt is cleared in 32 months (about 2 yrs 8 mos). You pay roughly $1,313.96 in interest, for a total of about $6,313.96.
How it works
Enter your current balance, the annual interest rate (APR), and the fixed amount you pay each month. The calculator simulates the payoff month by month to show the payoff time and total interest.
Good to know
The Debt Payoff Calculator estimates how long it will take to clear a single fixed debt and how much interest you'll pay along the way. You enter three numbers: your current balance, the annual interest rate (APR), and the flat amount you pay each month. It then simulates the balance month by month, applying interest first and subtracting your payment, until the debt reaches zero. It's aimed at anyone carrying a credit card, personal loan, or similar fixed-rate balance who wants a quick reality check on a steady repayment plan.
It's most useful when you're deciding on a payment amount or comparing scenarios: try $200/month versus $300/month and watch the payoff time and total interest drop. Because it works backward from a fixed payment (rather than asking how long until a target date), it answers the practical question most people actually have: "If I keep paying this much, when am I done and what does it cost me?"
Read the results together rather than in isolation. The "Months" and payoff date tell you the timeline; "Total interest" is the extra you pay on top of the balance, and "Total paid" is balance plus interest combined. The two bars compare principal against interest visually, and the note shows what share of every dollar paid goes to interest. A high interest share means a large portion of your payments is servicing the rate rather than reducing what you owe.
One important caveat: the math assumes a single fixed balance, a constant APR, no new charges, and the exact same payment every month. Real cards have variable rates, fees, and ongoing purchases, so your actual payoff will usually take longer than the estimate. If the tool returns "Never," your payment is at or below the first month's interest charge, meaning the principal never shrinks; raising the payment above that amount is the only way to make progress.
Frequently asked questions
Why does it say my debt will never be paid off?
If your monthly payment is equal to or less than the first month's interest (balance times APR divided by 12), the payment never reduces the principal, so the balance stays flat or grows. Increase your monthly payment above that interest amount to make progress.
Does this assume I keep making new charges on the account?
No. The calculator assumes a fixed balance with no new purchases and a constant APR. If you keep adding charges or your card has a variable rate, your real payoff time and interest will be higher than shown.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser; nothing is uploaded.
Is this financial advice?
No. These are educational estimates — consult a qualified financial professional before making decisions.
People also ask
How much should I pay each month to get out of debt faster?
Any amount above the first month's interest (balance times APR divided by 12) reduces the principal, and larger payments shorten the timeline and cut total interest substantially. You can test different monthly amounts in the calculator to see how each changes the payoff months and interest cost.
What is APR and how does it affect my payoff time?
APR is the annual percentage rate charged on your balance; the calculator divides it by 12 to get the monthly rate applied each month. A higher APR means more of each payment goes to interest, so the balance shrinks slower and the total cost is higher for the same payment.
Does paying only the minimum on a credit card ever pay it off?
It depends on whether the payment exceeds the monthly interest charge. If a fixed payment is at or below that interest amount, the balance never decreases; if it is above it, the debt is paid eventually but often over many years with high total interest.
How is total interest different from total paid?
Total interest is the extra cost added by the rate over the life of the debt, while total paid is your original balance plus that interest combined. Total paid is what actually leaves your account; total interest is the portion that did not reduce the principal.
Is it better to pay off high-interest debt first?
Targeting the highest-APR balance first, often called the avalanche method, minimizes total interest mathematically because higher rates generate more cost per dollar owed. Some people instead pay smallest balances first (the snowball method) for motivation; the trade-off is between lowest cost and earliest wins.
Why does my real payoff take longer than the estimate?
The calculator assumes a fixed balance, a constant rate, no new charges, and an identical payment every month. Real accounts often have variable APRs, added fees, and new purchases, all of which extend the actual payoff time and increase interest.
Does making extra one-time payments shorten the timeline?
Yes, in general, because reducing the principal lowers the interest charged in every following month. This calculator models a single fixed monthly payment, so to approximate an extra payment you would need to lower the balance input or increase the monthly amount.
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