Debt-Free Date Calculator

How a fixed payment clears the balance

Each month your payment is applied interest-first: the month’s interest is taken off the top and the rest reduces the principal. Because the balance falls, next month’s interest is smaller and a bigger slice of the same payment goes to principal - so the balance falls faster the longer you keep paying.

On a $15,000 balance at 18% APR, a $450 payment pays about $225 of interest in the first month; by the final months most of the payment is principal. That acceleration is what makes a fixed payment far quicker than a minimum payment of a similar starting size.

Because interest is charged monthly on the balance, the walk runs one month at a time rather than through a shortcut formula that would need to hold for every balance and rate; the month is the same unit the statement actually uses, and the loop repeats until the balance reaches zero.

Why the month, not just the total

The payoff month is the answer people actually want - something to mark on a calendar and work toward. This page gives the month directly instead of leaving you to count years and months from today on your own, and it prints the interest paid along the way as the supporting figure beneath it.

The start-month field then anchors that result to a real calendar: the payoff month is simply your start month plus the computed payoff time, so the answer you circle is a date on a calendar rather than an abstract count of months. No account is needed and nothing is connected - you enter the balance, the APR and the payment, and the schedule is walked from those.

When there is no date to give

If your fixed payment is smaller than the interest that accrues each month, the balance never falls - each payment barely covers the interest and the debt stays put. The page detects that and refuses to invent a date: when the interest outruns the payment, there is no debt-free month to compute.

That is the honest boundary of any debt-payoff calculation, and it is worth seeing rather than hiding - it means the plan has to change before a date can exist. A second boundary sits at the far end: a balance that would take longer than a century to clear is reported as not paid off within that window rather than given a pretend calendar date.

The shape of the trade-off

A bigger payment costs more up front but repays with interest: because every dollar above the monthly interest goes straight to principal, the payment-versus-time curve bends. On the $15,000 balance at 18% APR, $450 a month takes 3 years 11 months and pays nearly $5,951 of interest; $600 takes 2 years 8 months and about $3,942; $900 takes 1 year 8 months and about $2,392.

So doubling the payment from $450 to $900 more than halves the time and removes about $3,559 of interest - the second $450 buys more than the first. The same curve runs in reverse for the rate: the identical payment at a higher APR keeps the balance alive far longer and costs far more interest, which is how raising the payment lines up against refinancing in the payoff math.

One balance, or four?

Every figure on this page describes a single balance with a single rate. Spread the same $450 across four cards and each share is measured against that card’s own monthly interest: an $8,000 balance at 24% is charged $160 a month, so a $100 share never touches the principal and that card never gets a date.

The fix is ordering rather than spreading - send the whole payment to one balance, smallest or highest-rate first, then roll the cleared payment into the next. What this page answers is the date a single balance reaches under a payment that always exceeds its interest, and that condition is worth checking card by card before a plan is called a plan.