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Loan Payoff Calculator

This loan payoff calculator estimates how many months remain until a balance reaches zero at your current payment, then shows how much faster an extra monthly payment clears it. It also reports the total interest on each path and the interest saved by paying extra.

By the Paydayloaning Editorial Team · Last updated 2026-09-16

Advertising disclosure: Paydayloaning may receive a referral fee if you apply through the link above. That fee does not change the rate you are offered, and it does not change our content. We are not a lender. The lowest rates are only available to the most qualified applicants. Read the full disclosure.

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How this calculator works

If you know your balance, rate, and monthly payment, the calculator simulates each month: interest is charged on the balance, the rest of the payment reduces the principal, and the loop runs until the balance hits zero. Adding an extra monthly payment increases the amount going to principal each month.

The calculator reports the months to payoff, the total interest at your current payment, and the interest saved by paying extra. If your payment does not cover the monthly interest, the balance never falls and the calculator says the loan does not pay off instead of returning a number.

It assumes the rate stays fixed and no new charges are added. Any new borrowing or a rate change would move the payoff date.

Advertising disclosure: Paydayloaning may receive a referral fee if you apply through the link above. That fee does not change the rate you are offered, and it does not change our content. We are not a lender. The lowest rates are only available to the most qualified applicants. Read the full disclosure.

Frequently asked questions

How do extra payments shorten the payoff?
An extra payment goes straight to principal, so the balance falls faster and less interest accrues each month. That compounds over time, which is why even a small extra amount can cut months off the term.
Why does the calculator say the loan never pays off?
When the monthly payment is smaller than the interest charged that month, none of the payment reduces the balance. The debt grows or stays flat, so there is no payoff date unless the payment rises above the monthly interest.
What interest rate should I enter?
Use the rate on your current loan statement. If the rate is variable, the result is only an estimate because the payoff time will shift as the rate changes.
Does paying extra always save interest?
Yes on a fixed-rate loan, because the extra money reduces principal and stops future interest on that amount. The calculator reports the interest saved so you can see the effect for your balance.

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Advertising disclosure: we may receive a referral fee. The lowest rates are only available to the most qualified applicants.

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