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Mortgage Payoff Calculator

See how extra payments, biweekly payments, or a lump sum can pay off your mortgage years earlier — and exactly how much interest each strategy saves.

If You Know the Remaining Loan Term

Best for loans where you know the original amount, term and rate, and how much of the term is left. The calculator works out your current balance from the original schedule.

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If You Don't Know the Remaining Term

Use the unpaid balance, monthly payment and rate from your mortgage statement — the calculator derives the remaining term for you.

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Paying Off Your Mortgage Early

Every mortgage payment splits into two parts: principal, the amount you borrowed, and interest, the lender's charge for lending it, calculated each month on the balance that remains. Early in the loan the balance is at its largest, so most of each payment is interest. As the balance falls, interest shrinks and principal repayment accelerates. Anything that cuts the balance sooner — extra payments, biweekly payments, or a lump sum — removes interest from every month that follows, which is why early extra payments are worth so much more than late ones.

Strategy 1: Extra payments

Extra payments go straight to principal on top of your scheduled payment. They can be monthly, yearly, or a single one-time amount. The numbers are striking even for small amounts: on a $200,000, 30-year loan at 5%, one extra payment of $1,000 today shortens the loan by about four months and saves roughly $3,400 in interest — and adding just $6 a month saves about $2,800. Scale that up and the savings reach six figures, as the first calculator above shows. When you send extra money, tell your servicer to apply it to principal, not to future payments.

Strategy 2: Biweekly payments

Instead of one monthly payment, pay half the amount every two weeks. A year has 52 weeks, so you make 26 half payments — the equivalent of 13 full monthly payments instead of 12. That one extra payment per year goes entirely to principal and typically cuts several years off a 30-year mortgage. The schedule lines up naturally with a biweekly paycheck, so many borrowers never feel the extra payment at all. Check that your servicer applies the payments as they arrive rather than holding partial payments until the full amount accumulates.

Strategy 3: Refinance to a shorter term

Refinancing replaces your loan with a new one, ideally at a lower rate, a shorter term, or both. Shorter terms carry lower rates and force faster principal repayment. For example, refinancing $200,000 with 20 years left from 5% into a new 20-year loan at 4% drops the payment from $1,319.91 to $1,211.96 and saves about $25,908 in interest. The catch is closing costs, typically 2–5% of the loan, so compare the break-even point against how long you plan to stay. Run the numbers on our mortgage calculator before deciding.

Watch out for prepayment penalties

Some loans charge a fee for paying off early, because the lender loses years of expected interest income. Penalties are usually a percentage of the outstanding balance or a slice of upcoming interest, and they are largest in the first years of the loan. They have become uncommon, often expire after a few years, and are prohibited outright on FHA loans, VA loans, and loans from federally chartered credit unions. Still, read your loan documents or ask your lender before making a large extra payment.

When paying off early is NOT the best move

Every dollar sent to the mortgage is a dollar that cannot do something else. Mortgage rates are relatively low, so extra payments earn a modest, guaranteed return equal to your rate. Before adding extra payments, most households are better off: (1) clearing high-interest debt such as credit cards at 20%+, (2) capturing an employer's full 401(k) match and funding tax-advantaged accounts like an IRA, and (3) holding a 3–6 month emergency fund — home equity is hard to borrow back in a job loss. If those boxes are checked and you value the certainty of owning your home outright, extra payments are an excellent low-risk use of spare cash. The examples in the calculators above let you compare the trade-off with your own numbers.

FAQ

How much can extra mortgage payments save?

It depends on the balance, rate and remaining term, but the effect is large: an extra $500/month on a $372,217 balance at 6% with 25 years left pays the loan off 7 years and 9 months early and saves about $122,306 in interest.

How do biweekly payments pay off a mortgage faster?

Paying half the monthly payment every two weeks produces 26 half payments a year, which equals 13 full monthly payments. That one extra payment per year goes entirely to principal and typically shortens a 30-year mortgage by several years.

Should I pay off my mortgage early or invest?

Compare the mortgage rate with what the money could do elsewhere. Extra mortgage payments earn a guaranteed return equal to the interest rate. Higher-interest debts should usually be cleared first, and tax-advantaged retirement contributions often come before extra mortgage payments.

Disclaimer: This calculator provides estimates for educational purposes only and does not constitute financial advice. Results ignore taxes, insurance, HOA dues and any prepayment penalties. Confirm payoff figures with your loan servicer.

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