Mortgage Payoff Calculator
Discover how extra monthly payments can shorten your mortgage and save thousands in interest.
Results
| Scenario | Payoff Time | Total Interest | Total Paid |
|---|
What is a Mortgage Payoff Calculator?
A mortgage payoff calculator answers the two questions homeowners care about most: when will I be debt-free, and how much interest will extra payments save? Enter your balance, rate, and monthly payment, add an extra amount, and it re-amortizes the loan month by month to compare both schedules. If you only know your loan amount and term, our mortgage calculator can find the payment first.
How Extra Payments Shorten Your Mortgage
A fixed-rate mortgage payment comes from the amortization formula:
M = P × r / (1 − (1 + r)^−n)
- M — the monthly principal-and-interest payment
- P — the loan principal (amount borrowed or current balance)
- r — the monthly interest rate (annual rate ÷ 12)
- n — the number of monthly payments (years × 12)
Early in a loan, almost everything you pay is interest: on a $280,000 mortgage at 6.5%, the first $1,769.79 payment contains $1,516.67 of interest, and barely 14% touches principal. Every extra dollar goes entirely to principal, shrinking the balance next month's interest is charged on, so even modest extras compound into years off the loan.
Worked Example: $280,000 at 6.5% for 30 Years
The standard payment on a $280,000 fixed-rate loan at 6.5% for 30 years is $1,769.79 (exactly $1,769.7905). Over 360 scheduled payments you would pay about $357,125 in interest, roughly $1.28 of interest per $1 borrowed. All figures below match the calculator exactly when you enter $280,000, 6.5%, and $1,769.79; since the payment is rounded to the cent, it shows a tiny 361st final payment of $0.52.
Strategy A: Add $200 to Every Payment
Paying $1,969.79 instead of $1,769.79, an 11% larger payment, pays the loan off in 22 years 9 months (273 months), 7 years 4 months early. Total interest falls to $255,841.54, a saving of $101,283.37 and 28% less interest overall.
Strategy B: One Extra Payment Per Year
Make one additional full payment of $1,769.79 each year, say from a year-end bonus or tax refund. That single payment pays the loan off in 24 years 4 months (292 months), cuts 5 years 9 months off the schedule, and saves $78,385.69.
Strategy C: Biweekly Half-Payments
Pay half your payment ($884.90) every two weeks instead of one full payment a month. With 26 biweekly periods a year you make the equivalent of 13 full payments annually without feeling one big outlay. Because the extra principal lands sooner than a year-end lump sum, the loan is paid off in 24 years 2 months (290 months), saving $81,439.34, slightly better than Strategy B. Confirm your servicer credits biweekly payments as they arrive.
Comparing the Three Payoff Strategies
| Strategy | Payoff Time | Total Interest | Interest Saved | Time Saved |
|---|---|---|---|---|
| No extra payments | 30 yrs 1 mo | $357,124.92 | — | — |
| +$200/month | 22 yrs 9 mo | $255,841.54 | $101,283.37 | 7 yrs 4 mo |
| One extra payment/year | 24 yrs 4 mo | $278,739.23 | $78,385.69 | 5 yrs 9 mo |
| Biweekly half-payments | 24 yrs 2 mo | $275,685.57 | $81,439.34 | 5 yrs 11 mo |
Every cell comes from the same month-by-month simulation the calculator runs. The $200-a-month strategy wins on savings, but the best plan is the one that fits your cash flow. For a payment-by-payment breakdown, try the amortization calculator.
Before You Pay Extra on Your Mortgage
Check for a Prepayment Penalty
Most modern mortgages, including FHA, VA, USDA, and qualified conforming loans, carry no prepayment penalty. Where penalties are allowed, federal rules limit them to the first three years and cap them at 2% in years one and two and 1% in year three. Check your closing documents or call your servicer, and always specify that extra money be applied to principal, not held as an advance payment.
Recasting vs. Extra Payments
Extra payments shorten your loan but never lower the required monthly payment. A recast does the opposite: after a lump-sum principal payment, the servicer re-amortizes the balance over the remaining term, cutting the monthly payment while keeping your rate and payoff date. Lenders typically require a minimum lump sum and charge roughly $150–$500. Recasting improves cash flow; extra payments maximize interest savings.
Pay Off the Mortgage or Invest?
Paying down a 6.5% mortgage earns a guaranteed, risk-free 6.5% return, and with today's higher standard deduction many homeowners no longer itemize, making that return effectively after-tax. A diversified portfolio has historically returned more on average, but with market risk and taxes on gains. A sensible order: capture any 401(k) employer match, eliminate higher-interest debt, build a 3–6 month emergency fund, then split extra cash between the mortgage and investing. Compare both paths with our investment calculator and refinance calculator.
How to Use This Calculator
- Enter your current mortgage balance.
- Input your annual interest rate.
- Enter your current monthly payment (principal and interest).
- Enter the extra amount you can pay each month.
- Click Calculate to see time and interest savings.
Frequently Asked Questions
Should I pay extra on my mortgage?
If you have high-interest debt or lack an emergency fund, prioritize those first. Otherwise, extra mortgage payments can provide a guaranteed return equal to your interest rate.
Does paying extra reduce my monthly payment?
No, extra payments reduce your principal balance and total interest, but your required monthly payment stays the same unless you recast or refinance.
How much can I save with extra payments?
More than most people expect. On a $280,000, 30-year mortgage at 6.5%, an extra $200 per month saves $101,283.37 in interest and pays the loan off 7 years 4 months early; even one extra payment per year saves $78,385.69.
Is it better to pay extra monthly, annually, or biweekly?
Monthly extra payments usually win because principal falls sooner: on a $280,000 loan at 6.5%, $200 extra monthly saves $101,283.37, versus $81,439.34 biweekly and $78,385.69 for one annual payment. Biweekly plans remain popular because they align with paychecks and automate 13 payments a year.
Can I make lump-sum payments instead?
Yes, but this calculator models consistent extra monthly payments. Lump sums have a similar effect; consult your lender about applying them to principal.
What is mortgage recasting?
Recasting re-amortizes your remaining balance over the remaining term after a lump-sum principal payment, lowering the monthly payment while keeping your rate and payoff date. Lenders typically charge roughly $150 to $500 and require a minimum lump sum. Unlike extra payments, recasting does not shorten the loan.
Do mortgages have prepayment penalties?
Most do not. FHA, VA, USDA, and qualified mortgages generally cannot charge prepayment penalties; where permitted, they are limited to the first three years and capped at 2% of the balance in years one and two and 1% in year three. Check your loan documents or ask your servicer before large extra payments.
Should I pay off my mortgage early or invest?
Extra mortgage payments earn a guaranteed, risk-free return equal to your interest rate; investing may earn more on average but carries market risk and taxes on gains. A balanced approach: capture any employer retirement match, pay off higher-interest debt, keep an emergency fund, then split extra cash between the mortgage and investments.