Mortgage Payoff Calculator: See How Much You Can Save
See how extra monthly payments or a one-time principal payment change your payoff date and total interest, and decide whether paying off your mortgage early is the best use of your money.
Listen to this article
Key takeaways
- Extra money paid toward principal skips all the interest that balance would have charged for the rest of the loan, which is why small extras have a large effect.
- On a $250,000 balance at 6.5% with 25 years left, an extra $200 a month saves about $64,900 in interest and ends the loan 5½ years early.
- Paying early is a guaranteed, tax-free return equal to your mortgage rate, but an emergency fund, an employer 401(k) match and high-interest debt usually come first.
- Most mortgages today have no prepayment penalty; where one is allowed, federal rules cap it and end it after three years.
Paying a mortgage off early is one of the few financial moves with a known, risk-free return: every dollar of principal you pay now stops accruing interest at your loan rate. This mortgage payoff calculator shows what extra payments do to your payoff date and total interest. It works for extra amounts added to every monthly payment, for a one-time lump sum, or for both together.
Mortgage payoff calculator
Covers principal and interest only. Assumes the extra money goes to principal, which you may need to request from your servicer, and that the regular payment stays the same.
How extra payments shorten a mortgage
Your regular payment is fixed. Each month the lender first takes the interest due on the current balance, and the rest reduces principal. When you add money and it is applied to principal, the balance drops faster, so next month's interest is smaller and more of the regular payment goes to principal. The effect compounds: the earlier in the loan you pay extra, the more interest you avoid.
Extra payments do not lower your required monthly payment. They shorten the loan instead. If you want a smaller payment rather than an earlier payoff, a mortgage recast re-amortizes the lower balance for a small fee.
What different extra payments save
The example is a $250,000 balance at 6.5% with 25 years (300 payments) left. The regular principal and interest payment is $1,688.02, and if nothing changes, the remaining interest totals about $256,400.
| Extra each month | Paid off in | Time saved | Interest saved |
|---|---|---|---|
| $0 | 25 years | – | – |
| $100 | 21 years, 11 months | 3 years, 1 month | $37,671 |
| $200 | 19 years, 6 months | 5 years, 6 months | $64,928 |
| $500 | 14 years, 11 months | 10 years, 1 month | $115,668 |
| $1,000 | 10 years, 10 months | 14 years, 2 months | $157,724 |
The savings are larger still on a new loan. On a $320,000, 30-year mortgage at 7.28%, an extra $200 a month from the first payment saves about $127,000 in interest and ends the loan almost seven years early.
Lump sum vs. extra monthly payments
A one-time payment works the same way, just all at once. Paying $10,000 toward principal today on the loan above saves about $37,000 in interest and 2 years and 3 months. That is close to what $100 a month achieves, but it requires the cash up front. Bonuses, tax refunds and inheritances are common sources.
A popular middle way is to make one extra full payment a year, for example by adding one-twelfth of the payment ($140.67 here) to each month. On this loan that saves about $49,700 and ends the loan 4 years and 2 months early. Biweekly payment plans do the same thing by collecting half a payment every two weeks, which adds up to 13 full payments a year. Avoid third-party biweekly programs that charge enrollment or per-payment fees; you can get the same result for free by paying a little extra each month.
Should you pay off your mortgage early?
Paying extra earns a return equal to your mortgage rate, guaranteed. Whether that is the best use of the money depends on what else it could do.
| Use of extra cash | Why it often comes first |
|---|---|
| Emergency fund | Money paid into a mortgage cannot be withdrawn without a new loan. Keep three to six months of expenses liquid first; see how much to keep. |
| Employer 401(k) match | A 50% or 100% match is an immediate return no mortgage can beat. |
| Credit cards and other high-rate debt | Card APRs averaged 22.15% for accounts charged interest in Q2 2026, several times a typical mortgage rate. |
| Retirement investing | Over long periods stocks have tended to earn more than a 3% to 5% mortgage costs, but with risk; at 7% or more the guaranteed payoff return looks better. |
The rate matters most. A homeowner with a 3% mortgage can earn more than that in a high-yield savings account with no risk, so prepaying makes little sense. With a 7% loan, a guaranteed 7% return is attractive. Taxes play a smaller role than many people assume: most homeowners take the standard deduction, so their mortgage interest saves them no tax at all. Peace of mind counts too. Many people simply want to retire without a house payment, and that is a legitimate goal.
Prepayment penalties
Most mortgages made today can be paid off early without a fee. Under the federal ability-to-repay rules, a prepayment penalty is allowed only on certain fixed-rate qualified mortgages that are not higher-priced, and it is capped at 2% of the balance prepaid in the first two years and 1% in the third year, with none after that. FHA, VA and USDA loans do not charge prepayment penalties. Your Loan Estimate and Closing Disclosure state whether your loan has one.
How to make extra payments correctly
- Mark the extra as "principal only". Most servicers have a separate field online. Without it, some apply the money to next month's payment or to escrow instead of reducing the balance.
- Pay the regular amount first. An extra payment does not replace the next scheduled payment.
- Check your next statement. The principal balance should drop by the full extra amount.
- Keep it flexible. Automatic extras are convenient, but you can stop them in a tight month without penalty. A shorter loan term would make the higher payment mandatory.
Extra payments vs. refinancing
Refinancing into a 15-year loan forces a faster payoff and usually lowers the rate, but it costs closing costs and makes the higher payment mandatory. If current rates are lower than yours, compare both with the refinance break-even math. If your rate is already low, extra payments keep that rate. To see the full monthly payment on a new loan, including taxes and insurance, use the mortgage calculator.
Frequently asked questions
How much faster will I pay off my mortgage with extra payments?
It depends on the rate, the balance and the time left. On a $250,000 balance at 6.5% with 25 years remaining, $200 extra a month ends the loan 5 years and 6 months early.
Is it better to make one lump-sum payment or extra monthly payments?
Money paid earlier saves more interest, so a lump sum now beats the same total spread over the coming years. Monthly extras are easier for most budgets. Both work; the key is that the money goes to principal.
Does paying extra on my mortgage lower my monthly payment?
No. The required payment stays the same and the loan ends sooner. To lower the payment after a large prepayment, ask your servicer about a recast.
Do extra payments affect PMI?
Yes. Paying down a conventional loan faster brings the balance to 80% of the original value sooner, when you can ask to cancel PMI, and to 78%, when it ends automatically.
What is the mortgage payoff amount?
The payoff amount is the principal balance plus interest owed up to the payoff date and any fees. It is higher than the balance on your statement, so request an official payoff quote from your servicer before paying off the loan.
