Single Debt Payoff Calculator

How long will it take to pay off my debt?

The payoff timeline depends on three main factors:

• your current balance

• the interest rate (APR)

• the amount you pay each month

Higher payments reduce the balance faster and lower the total interest charged.

This calculator simulates the repayment month by month using the exact interest mechanics of your debt. By adjusting your payment amount, extra payments, or lump sums, you can instantly see how those changes affect your payoff date and total interest cost.

What happens if I only make minimum payments?

Minimum payments are designed to keep your account in good standing, but they reduce the balance very slowly.

Because credit card interest accrues continuously, a large portion of each minimum payment often goes toward interest rather than reducing the principal balance. As the balance decreases, the minimum payment may also decrease, which can extend the repayment timeline significantly.

In many cases, paying only the minimum can keep a balance active for many years while accumulating substantial interest costs.

If you want to understand this effect in detail, try the Minimum Payment Trap Calculator, which shows how long minimum payments can keep a balance active.

What is calendar-accurate daily accrual?

For credit cards, this calculator calculates interest using the actual number of days in each calendar month. February may have 28 or 29 days, while months like July and August have 31 days.

Because interest accrues daily, these differences slightly affect how much interest is charged each month. The daily interest rate is calculated as: Daily Rate = APR ÷ 365. Using the real calendar produces more accurate results than calculators that assume every month has the same length.

How does installment loan amortization work?

Installment loans (such as personal loans, car loans, or mortgages) follow a process called amortization. Each monthly payment is divided into two parts: interest and principal.

If you enter a loan term (for example 36 or 60 months), the calculator computes the required monthly payment using the standard amortization formula. Extra payments and lump sums go directly toward the principal, which reduces interest and shortens the payoff time.

What is a balance segment on a credit card?

A credit card can carry multiple balances with different interest rates at the same time. For example: purchases at the regular APR, a promotional 0%balance transfer, and cash advances at a higher rate. Each portion behaves like a separate balance segment with its own interest rate.

This calculator lets you model each segment separately to produce a more accurate payoff projection.

What is the promo cliff?

A promo cliff occurs when a 0% or low-rate promotional period ends and the remaining balance converts to the regular APR. If the promotion uses deferred interest, all interest accumulated during the promotional period may be added to the balance at once if the balance is not fully paid before the promotion expires.

This calculator highlights when a promotional period is about to expire so you can see how it affects your payoff timeline.

How do extra payments affect my payoff timeline?

Extra payments reduce the principal balance directly. Because interest is calculated on the remaining balance, lowering the principal earlier reduces the amount of future interest charged.

Even small additional payments each month can significantly shorten the payoff period and lower the total interest paid. This calculator lets you test different extra payment scenarios to see how they affect your payoff date and total cost.