Quick answer: To pay off a 15-year mortgage in 10 years, raise each payment by about 29% to 34% and send the extra as principal (the amount you still owe). That range is our example math for example existing-loan rates of 5%, 6% and 7%, checked October 12, 2026. In that math, a loan paid off on a 10-year schedule carries about 36% less total interest than the same loan kept on a 15-year schedule. Your result depends on your loan. You have four tools: extra principal, biweekly payments, a recast, or a shorter refinance. Whichever you pick, tell your servicer the extra money is for principal, then check your next statement.
Key takeaways
- Extra principal is the most flexible tool. Any amount, any month, and you can stop anytime.
- Biweekly means 26 half payments, which is 13 full payments a year. Check the fees before paying for a biweekly service.
- A recast lowers your payment after a lump sum and keeps your rate. It is mostly for conventional loans.
- A shorter-term refinance forces the habit but takes away your freedom to stop. Compare honestly.
- FHA and VA loans have no prepayment penalty (a fee for paying early). Some conventional loans can, for the first 3 years only.
How much extra does it take to pay off a 15-year mortgage in 10 years?
On a brand new 15-year loan, you need a payment about 29% to 34% larger to finish in 10 years. The table shows our example math for three rates. The surprise: the lower your rate, the bigger the raise you need. That is because a low rate means more of each payment already goes to principal.
These are example rates on a loan you already have. They are not rates Valley West offers and not a quote.
| If your loan's rate is | Raise each payment by about | Share of total interest you avoid | Biweekly alone ends the loan in about |
|---|---|---|---|
| 5% | 34% | 36% | 13.4 years |
| 6% | 32% | 36% | 13.2 years |
| 7% | 29% | 36% | 13.2 years |
Assumes a new fixed-rate 15-year loan, on-time payments, and every extra dollar applied to principal. Biweekly assumes each half payment is applied when received.
The interest you avoid stays near 36% at every rate in the table. Paying every two weeks on its own gets a 15-year loan done in a little over 13 years. To reach 10 years, you need extra principal on top. If you are already a few years into your loan, use the calculator below with your real balance and years left. Example math only, not an offer.
How do you run the numbers for your own loan?
Enter what you owe today, your rate, the years left, and the year count you want. The tool shows the payment you need and the interest you would skip. Find your balance and rate on your latest mortgage statement.
Payoff calculator: how much extra to finish on your date
Estimate for fixed-rate loans, on-time payments, principal and interest only. Your actual payment may differ. Taxes, insurance and mortgage insurance are not included. This is not a quote, an offer or a commitment to lend.
Want more tools? Our mortgage calculators page has payment and affordability calculators. The how much house can I afford guide covers the other side of the budget.
Why is extra principal the flexible default?
Every extra dollar of principal moves you ahead on your amortization schedule (the plan that splits each payment between interest and principal). Early in a loan, most of each payment is interest. So extra principal sent early does the most good. Mark each extra payment principal only with your servicer. Then check the next statement. Make sure it landed on principal, not in a holding account or as next month's payment. Round up, send tax refunds, or set a fixed extra amount each month. The tool bends to your budget, not the other way around.
Do biweekly payments really work?
Pay half your mortgage every two weeks and the calendar does the rest. 26 half payments add up to 13 full payments a year. That is one extra month of principal each year, every year, on autopilot. The catch is the businesses that grew up around it. Some outside biweekly programs charge setup fees and per payment fees for math you can do free. If your servicer offers biweekly drafting at no cost, fine. If not, just send one extra principal payment a year yourself.
How does a recast work, and when should you use one?
A recast takes a large principal payment, such as an inheritance, a bonus, or money from a sale. Then your servicer spreads the smaller balance over the time you have left. Your rate stays. Your end date stays. Your required payment drops, usually for a modest fee. It works the opposite way from the other tools. It does not make the loan shorter. It makes the loan lighter. Recasting is mostly a conventional loan feature. FHA and VA loans usually do not offer it. For those, the closest move is a refinance.
Which payoff method fits you best?
The four tools trade freedom for force. Extra principal gives you the most freedom. A shorter refinance gives you the most force, since the higher payment is required. For many people, extra principal is a good place to start.
| Tool | How it works | Can you stop? | Cost | Best for |
|---|---|---|---|---|
| Extra principal | Add any amount to principal, any month | Yes, any month | Free | Most people; the flexible default |
| Biweekly payments | Half a payment every two weeks, so 13 full payments a year | Yes | Free through your servicer or by hand; skip paid services | People paid every two weeks |
| Recast | Lump sum to principal, then a new lower payment | One time event | Usually a small servicer fee | A windfall when you want a lower payment |
| Shorter refinance | A new, shorter-term loan replaces the old one | No, the higher payment is required | Closing costs | People who want the payment to force the habit |
If you are weighing a refinance, read our Las Vegas refinance guide first. A refinance has closing costs, so it should save you more than it costs. If you have an adjustable rate loan, our guide to adjustable rate mortgages explains how your payment can change.
Deciding between extra principal, a recast, or a shorter term?
A Las Vegas loan officer can run your actual balance and rate through all three paths in one conversation. That includes whether a shorter refinance beats paying ahead on your own, on your numbers. No obligation.
Get your fast quoteWill you pay a prepayment penalty for paying early?
A prepayment penalty is a fee some lenders charge if you pay off all or part of a loan early. Many loans have none, but check before you send a big lump sum. The Consumer Financial Protection Bureau (CFPB), the federal agency that watches over mortgages, puts it plainly:
"Prepayment penalties do not normally apply if you pay extra principal on your mortgage in small chunks at a time."
| Loan type | Prepayment penalty? | What to check |
|---|---|---|
| FHA | No | Your payoff statement. FHA loans closed before January 21, 2015 can charge interest through the end of the payoff month. |
| VA | No | A partial early payment can be required to be at least one monthly payment or $100, whichever is less |
| Conventional, closed on or after January 10, 2014 | Only on some fixed rate loans, never after year 3, and capped at 2% of the amount paid early in years 1 and 2 and 1% in year 3 | Your promissory note and your Closing Disclosure. These limits cover home loans for personal use. Investment and business loans, such as DSCR loans, are not covered and can have different terms. |
Federal rules set those conventional loan limits for loans that closed on or after January 10, 2014. Your promissory note (the loan contract you signed) says for sure. If you hold an FHA loan or a VA loan, you can pay ahead without a penalty. FHA loans are insured and VA loans are guaranteed by the government. They are made by private lenders like Valley West.
How do you make sure extra money goes to principal?
This is the step people skip, and it is the one that matters most. Follow these four steps each time you pay extra.
- Pick the right box. In your servicer's app or on the payment coupon, choose "additional principal" or "principal only." Do not just send more money.
- Pay the regular payment first. Many servicers apply money to the payment due before any extra.
- Keep a record. Save the confirmation number or a screenshot.
- Check the next statement. Your principal balance should drop by the regular share plus your extra. If it does not, call your servicer and ask them to move it.
Your escrow account (the account that pays your property taxes and home insurance) is separate. Extra principal does not change it. Learn more in our guide to escrow account facts you may not know.
What should you do before you pay ahead?
Extra principal saves you interest at your mortgage rate. That money is tied up in your home, so keep an emergency fund first. Your tax situation can change that math a little. It is a solid choice, but not always the best use of your next dollar. Build your emergency fund first. Pay off high interest debt. Take any retirement match from work. If you carry credit card balances, paying ahead on the mortgage pays down your cheapest debt. Meanwhile your most expensive debt keeps growing. Our guide on debt to income ratio shows how lenders weigh your other debts.
Example borrower scenario
An owner adds a fixed extra amount to principal each month starting in year two of a 30-year loan. They also send one extra full payment each January. No refinance, so no closing costs, and the loan is on track to end years early. When a family windfall arrives, they weigh two choices. A recast gives a lower payment with the same payoff date. Sending it as principal keeps the same payment with an earlier payoff. They choose based on their monthly cash needs. Illustrative only.
Early payoff FAQ
How can I pay off my mortgage early?
There are four main ways. Send extra principal (the amount you still owe) when you can. Pay half your payment every two weeks. Recast after a lump sum. Or refinance to a shorter loan. Extra principal gives you the most freedom. A shorter refinance locks you in the most.
How much extra does it take to pay off a 15-year mortgage in 10 years?
In our example math, about 29% to 34% more each month, for example existing-loan rates of 5%, 6% and 7%. The lower your rate, the bigger the bump, because less of each payment goes to interest. Use the calculator on this page with your own balance and rate.
Do extra payments automatically go to principal?
Not always. Tell your servicer (the company that collects your payment) that the extra money is a principal-only payment. If you do not, it may sit in a holding account or count as next month's payment. Check your next statement to be sure.
What is a mortgage recast?
You pay a large lump sum toward principal. Then the servicer works out a new, lower payment over the time you have left. Your rate and end date stay the same. There is usually a small fee. It is mostly a conventional loan feature. FHA and VA loans usually cannot be recast.
Is paying every two weeks a trick?
No, the math is real. 26 half payments add up to 13 full payments a year, so you pay one extra month of principal each year. Check the fees before you pay an outside company for this. You can send the extra principal yourself for free.
Can I pay extra on an FHA or VA loan?
Yes. FHA and VA rules let you pay ahead without a prepayment penalty (a fee for paying early). On a VA loan, a partial early payment can be required to be at least one monthly payment or $100, whichever is less.
Does paying extra lower my monthly payment?
No. Extra principal makes the loan end sooner, but the required payment stays the same. Only a recast or a refinance changes the required payment.
Should I pay off my mortgage early at all?
Only after more urgent money needs are covered: an emergency fund, high interest debt, and any retirement match from work. Extra principal saves you interest at your mortgage rate. That money is tied up in your home, so keep an emergency fund first.
Want a loan officer to check your payoff plan?
Send your question and a Valley West loan officer will run your balance, rate and goal date with you. Or call us at (702) 696-9900. No obligation.
Get your fast quoteSources
- CFPB: Prepayment penalties and where they can apply
- CFPB: How does paying down a mortgage work?
- 12 CFR 1026.43(g): prepayment penalty limits (Regulation Z)
- 38 CFR 36.4311: VA loan prepayment
- 24 CFR 203.22: FHA loan prepayment
Facts last verified October 12, 2026 against CFPB publications and the federal rules linked above. The payoff table is our own math on a standard fixed payment schedule.
