Mortgage Payoff Calculator

How it works

How fast a mortgage clears depends on how far your payment outruns the interest. Each month interest is added to the balance and your payment is subtracted, so the bigger the gap between the two, the faster the balance falls. The number of months to zero comes from inverting the amortization formula:

• n — the number of monthly payments to payoff
• L — the current balance
• i — the monthly interest rate (APR ÷ 12)
• M — your monthly payment

With the defaults above, a $250,000 balance at 7% paid at $2,000 a month clears in about 225 payments, roughly 18.8 years, with around $199,164 of interest along the way. The first month alone charges about $1,458 of interest, so a $2,000 payment leaves about $542 to attack the principal, and that gap widens every month.

✓ Every result is checked against independent reference math. See how we test the calculators →

A worked example: $250,000 at 7%

You've got $250,000 left on the mortgage at 7%, and you're putting $2,000 a month toward principal and interest. Hold that pace and the loan clears in April 2045, roughly 18.8 years and 225 payments down the road.

Here is where it stings. Interest alone over that stretch runs $199,164, and once you add it to what you borrowed, the total handed to the lender reaches $449,164. That is nearly double the $250,000 you started with.

Every extra dollar you aim at principal eats straight into that interest number and pulls the date closer. Enter your own balance, rate, and monthly payment to find the payoff date that fits your loan.

Speeding up your payoff

The single lever that moves your date most is the size of the payment above the interest charge. Because early interest is high, even a modest increase carves months or years off the end of the loan and removes the most expensive interest first. If your payment barely clears the first month of interest, the loan will crawl, so aim comfortably above that floor.

Round your payment up, apply windfalls to principal, and watch the date pull forward.

Why the payment has to beat the interest

A mortgage only shrinks when your payment is larger than the interest charged that month. The first month’s interest is the balance times the monthly rate, and that amount is the floor your payment has to clear before a single dollar touches principal. Pay exactly the interest and the balance never moves; pay less and it grows.

This is why the calculator can return "Never" for a payment that looks substantial but sits below the interest line.

• The floor falls over time. As the balance drops, the monthly interest charge drops with it, so the same payment attacks principal harder each month.
• Small gaps crawl. If your payment barely clears the interest, almost nothing goes to principal at first and the payoff stretches out for decades.
• Widening the gap compounds. Every extra dollar above the floor lowers next month’s interest, which frees up even more of the following payment for principal.
• The "Never" result is a signal. It means the payment is below the interest floor, and the tool shows the minimum needed to clear the loan within five years.

Lump sums versus steady extra

There is more than one way to reach a payoff date sooner, and they are not all equal. A steady extra amount added to every payment is predictable and easy to automate, while a one-time lump sum aimed at principal delivers an immediate jolt. Both remove future interest, but they suit different situations and cash flows.

• Steady extra. Rounding the payment up or adding a set amount each month builds a habit and chips away relentlessly, ideal for a reliable paycheck.
• Lump sums. A tax refund, bonus, or windfall applied to principal cuts the balance in one stroke and removes interest for the entire remaining term.
• Combine them. Many people do both, keeping a modest monthly extra and adding lump sums when they land, which pulls the payoff date in fastest.
• Confirm the application. Whichever you choose, tell the servicer the money is for principal, not a prepayment of the next scheduled bill.

Payoff in the context of everything else

Clearing the mortgage early feels great, but it competes with other uses of the same money, so it is worth being deliberate. Cash locked into your house is hard to reach without a sale or a new loan, and the payoff date is one goal among several, not automatically the top one.

• Clear costlier debt first. Credit cards and other high-rate balances usually cost far more than a mortgage, so they deserve your extra dollars ahead of the home loan.
• Keep a cash cushion. An emergency fund you can actually touch is safer than equity you would have to borrow against in a pinch.
• Weigh investing and retirement. Matched retirement contributions and long-horizon investing can outrun a low mortgage rate, so compare the guaranteed saving against the likely alternative.
• Guaranteed and risk-free. Still, paying the mortgage down is a certain return equal to your rate, which is genuinely attractive when that rate is high.