Debt payoff calculator
How long a balance takes to clear, what the interest costs, and what paying the minimum costs you instead. Nothing is stored and there is nothing to sign up for.
Or start from something typical
On this page
How the calculation works
Proper amortisation, month by month. Each month the balance is charged one twelfth of the APR, then your payment is applied to what is left. Repeat until the balance hits zero, or until 30 years have passed and it plainly is not going to.
This matters because the shortcut everybody reaches for , balance divided by payment, is wrong by years on anything with a card's interest rate. $4,286 at 22.9% paying $250 a month is not 17 months. Interest keeps landing on the part you have not paid yet, and the calculator above shows you the real figure and what it costs to get there.
If you do not know your APR
Leave the field empty. What you get back is the interest-free case, and it is labelled as optimistic rather than presented as the answer, because a rate you do not know is not a rate of zero. Treating an unknown rate as 0% is how a payoff date ends up years early, which is the one direction a debt date must never be wrong in.
A literal 0 is different and perfectly valid: a promotional balance really is 0%, and the calculator treats that as the fact it is.
Your APR is on your statement, usually on the last page in the interest summary. It is worth the two minutes.
What paying the minimum really costs
Fill in the minimum payment field and the calculator runs the same arithmetic twice, once at your payment and once at the minimum, and tells you the gap in months and in dollars.
The gap is usually the most persuasive number on the page, and it is not close. A minimum payment is designed to cover the interest and a sliver of principal, which is an arrangement that works extremely well for the lender. Nothing in this calculator is trying to shame anybody. It just puts the two numbers next to each other, which is normally enough.
When a payment never clears it at all
If your payment is at or below the first month's interest, the balance does not fall. It stays, or it grows. The calculator says exactly that instead of returning a very large number of months, because “480 months” reads like a bad outcome while the truth is that there is no outcome.
The fix is arithmetic rather than willpower: the payment has to beat the interest before any of it touches what you owe.
What Xfin does with this
The app runs the same computation on your real balances, and then does three things a calculator cannot:
- It knows the rate without you typing it. On a connected card, the APR and the minimum payment come from your bank, so the projection uses your actual terms.
- It tells you what the debt is costing you a month. Interest across every liability you hold, weighted by rate. The amount that is dragging your net worth backwards before you have spent anything. Where that shows up.
- It leaves your spending money alone. A debt payoff goal tracks progress and projects a date, but it is deliberately skipped when your cash reserve is calculated. The payment already comes out as a bill, and counting it twice would tell you that you have less than you do.
The money maths is never done by the assistant. A deterministic engine computes the payoff; Fin explains the result. That separation is on purpose: language models are good at explaining and bad at arithmetic, and this is your debt.