Calculate how fast you can pay off your mortgage with extra payments. See the new payoff date, years saved, and total interest saved with lump-sum or recurring extras.
Paying off your mortgage early can save tens — or even hundreds — of thousands of dollars in interest. But how much earlier can you be debt-free with an extra $200 a month? What about a one-time lump sum? This Mortgage Payoff Calculator answers those questions instantly.
Enter your current balance, rate, remaining term, and any extra payments you plan to make. The calculator re-amortizes your loan and shows the new payoff date, the number of years shaved off, and the total interest saved compared to your original schedule.
Whether you received a bonus, an inheritance, or simply want to redirect extra cash each month, this tool helps you see the tangible impact of accelerating your mortgage. Because mortgage interest is front-loaded heavily in the early years, extra payments made sooner have a disproportionately large impact on total savings. Even modest additional amounts — as little as $50 per month — can shave years off a 30-year loan when applied consistently from the start, making early action the single most powerful payoff strategy.
Even small additional payments can have an outsized effect on your mortgage timeline because they go directly toward principal, reducing the balance on which future interest accrues. This calculator quantifies the savings so you can decide whether extra payments, a lump-sum paydown, or a combination delivers the best result for your situation.
Re-amortize the current balance at the existing rate, adding extra principal each month. New payoff occurs when balance reaches $0. Interest Saved = Total Interest (original schedule) − Total Interest (accelerated schedule). Time Saved = Original Payoff Date − New Payoff Date.
Result: Pay off 7.3 years early, save $108,412 in interest
With a $300,000 balance at 6.5 % and 25 years remaining, the base payment is $2,028/month and total interest is $308,385. Adding $300/month extra reduces the payoff to 17.7 years and total interest to $199,973 — a savings of $108,412 and 7.3 years.
When you make an extra payment, 100 % of it goes to principal reduction (assuming your lender processes it correctly). This immediately reduces the balance on which next month's interest is calculated. Over time, this compounds: a smaller balance means less interest each month, which means more of your regular payment also goes to principal.
A consistent monthly extra builds savings steadily over time. A lump sum delivers a dramatic one-time reduction. The ideal strategy often combines both: redirect your annual bonus or tax refund to principal while maintaining a modest monthly extra. This calculator lets you model both simultaneously.
Paying off a 3 % mortgage early provides a guaranteed 3 % return on your money. If you could earn 7–8 % investing, the math may favor investing. But at 6–7 %, the decision is closer, and the psychological benefit of being mortgage-free is significant. There is no universally correct answer — your risk tolerance, tax situation, and financial goals all matter.
It depends on your balance, rate, and remaining term. On a $300,000 loan at 6.5 % with 25 years left, an extra $200/month saves roughly $80,000 in interest and pays off the loan about 5.5 years early. Higher balances and rates amplify the savings.
Compare your mortgage rate to your expected investment return after taxes. If your rate is 6.5 % and you expect 8 % returns, investing may mathematically win — but paying off the mortgage provides a guaranteed, risk-free return. Many people value the peace of mind.
Typically no — your monthly payment stays the same but fewer payments are needed. This means you pay off the loan sooner. To actually lower your monthly payment, you would need to refinance or ask your lender for a formal recast (re-amortization) after a large lump sum.
A recast re-amortizes your remaining balance over the existing term at the same rate, producing a lower monthly payment. Lenders often require a minimum lump sum ($5,000–$10,000) and charge a small fee. It's an alternative to refinancing that keeps your original rate.
Most conventional and government-backed loans do not have prepayment penalties. However, some non-QM or jumbo loans may include them, especially in the first 3–5 years. Check your loan documents or ask your servicer before making large extra payments.
The earlier in the loan, the better. Interest savings are greatest when the balance is highest and the most time remains. A $10,000 lump sum in year 2 saves far more than the same payment in year 20.