# The Power of One Extra Mortgage Payment By TJ Kuczewski (@tjkuczewski) · Published 2026-09-22 Canonical: https://voce.com/@tjkuczewski/power-one-extra-mortgage-payment-v5hgzg --- The single most effective money move most new homeowners never make costs nothing in fees and takes about five minutes to set up: one extra mortgage payment a year. On a typical 30-year loan, that one annual payment chips away enough principal to shave years off your term and save tens of thousands of dollars in interest — and the earlier you start, the bigger the payoff. As a mortgage advisor, I see borrowers every week walk out of closing with a payment plan they never revisit, unaware that a tiny habit built into the first year can hand them a fully paid-off home years ahead of schedule. This guide breaks down exactly how the math works and walks through four simple ways to make it happen. #### Key Takeaways - One extra annual mortgage payment can shorten a 30-year loan by years and save tens of thousands in interest. - Extra payments only help if they're applied to principal — confirm with your servicer first. - Biweekly payments equal 13 full payments a year and automate the habit. - The longer you wait to start, the less interest you save — start early. ## How much does one extra payment save you? A single extra annual payment doesn't sound like much, but the compounding math behind it is striking. Take a $350,000, 30-year fixed mortgage at a 6.63% APR — a typical loan in today's market. [Rocket Mortgage](https://www.rocketmortgage.com/learn/biweekly-vs-monthly-mortgage-payments) lays out exactly what happens when you make the equivalent of 13 payments a year instead of 12: the loan gets paid off in **24 years and 6 months** instead of 30, and total interest drops from **$436,076** to **$342,701** — a savings of more than $83,000. That's the reward of one extra payment a year, automated. The exact figure shifts with your own balance and rate, but the pattern holds on nearly any 30-year loan: the more principal you retire early, the less interest every future payment accrues, and the sooner the final payment arrives. Your savings shrink the later you start, which is why the same loan pays off even faster when the first extra payment lands in year one. ![A mortgage amortization calculator showing a payment schedule](https://convex.voce.com/api/storage/643afd7f-629a-4bb3-9e69-175a62c0573a) ## Why does the first extra payment matter most? Because interest is calculated on your remaining balance, an early extra payment has an outsized effect. On a standard amortization schedule — the table your lender uses to divide each payment between interest and principal — the early years tilt heavily toward interest, so the balance barely budges each month. An extra principal payment drops that balance below what the schedule expects, and every subsequent payment then accrues interest on a smaller number. That snowball compounds: [Rocket Mortgage](https://www.rocketmortgage.com/learn/biweekly-vs-monthly-mortgage-payments) explains that making the equivalent of 13 monthly payments a year "allows you to pay off your loan early – it's essentially a loan-term reduction." Each extra dollar slows the loan's interest machine, and the effect is strongest in year one, when the balance (and the interest charged on it) is largest. ![A mortgage amortization calculator showing a payment schedule](https://convex.voce.com/api/storage/6fa1146d-28c5-4c82-b085-bd3ac48f242a) ## How to make your first extra payment today There's no single right way to make an extra payment — the best method is the one you'll actually stick with. Below are the four most common approaches, ranked roughly from most automatic to most flexible. **Biweekly payments (the most automatic).** Sign up to pay half your monthly amount every two weeks. With 52 weeks in a year, that yields 26 half-payments — the equivalent of 13 full monthly payments, or one extra per year. [NerdWallet](https://www.nerdwallet.com/mortgages/learn/should-you-make-biweekly-mortgage-payments) notes many borrowers choose this because it matches a biweekly paycheck, making the extra contribution feel invisible. Confirm your lender offers it — not all do — and beware third-party plans that charge a fee for a payment schedule you can often set up directly with your servicer. **The 1/12th addition.** Add one-twelfth of your monthly payment to every regular payment. If your payment is $2,000, you send $2,166.67 each month; the extra $166.67 goes to principal. At year's end you've made the equivalent of one full extra payment, spread painlessly across 12 installments. This is the same total as biweekly but requires no program and works with any servicer that accepts extra principal. **A lump sum on a windfall.** Use a tax refund, bonus, or holiday gift to make one full extra payment at a set time each year. [Rocket Mortgage](https://www.rocketmortgage.com/learn/biweekly-vs-monthly-mortgage-payments) recommends exactly this: "If you get an influx of cash, such as a gift at the holidays or an annual bonus, you can pay it toward your principal." It builds a disciplined annual habit around money that might otherwise get spent. **Round up every payment.** Send a rounded-up amount each month — if your bill is $2,867, send $2,900, with the extra $37 going to principal. [Rocket Mortgage](https://www.rocketmortgage.com/learn/biweekly-vs-monthly-mortgage-payments) calls this one of the simplest methods, good for borrowers who want a hands-off approach with minimal cash-flow strain. The exact amount you round up by is up to you; even a small monthly addition compounds into a meaningful principal cut by year's end. ## Important: make sure it goes to principal An extra payment only saves you interest if your servicer applies it to the loan's principal — the original amount you borrowed — rather than to future payments or next month's bill. Consumer financial regulators advise homeowners making extra payments to confirm the additional money is applied to principal, a warning mortgage lenders echo when they note that escrow contributions do not reduce your loan balance. When you make the payment, either mark it principal only online, attach a note, or call your servicer to verify. Also confirm your loan has no prepayment penalty; some agreements charge a fee for paying early, though most conventional loans don't. ## What else should you consider before paying extra? Before committing extra cash to your mortgage, weigh it against higher-priority debts and your emergency savings. A mortgage at, say, 6.5% is expensive debt, but if you're carrying a credit card at 20%, paying that off first saves more per dollar. Likewise, an emergency fund protects you from refinancing or borrowing against the home in a pinch. The general order: build a small safety net, clear high-interest debt, then accelerate the mortgage. If you're already on track there, an extra payment to principal is one of the safer, higher-yielding moves a new homeowner can make — it's guaranteed, tax-free savings that you get back the moment you need it in the form of owned equity. ## The bottom line One extra mortgage payment a year is a small habit with an outsized reward: years knocked off your term and tens of thousands of dollars kept out of the lender's pocket. Start in your first year, confirm the payment hits principal, and pick the method you'll actually repeat. As mortgage interest rates in the 6-7% range, the effective return on that extra payment is a risk-free, tax-free "investment" most market options can't match. Do the math on your own loan, then make the move.