What one extra payment does to your loan
Making one extra mortgage payment per year shortens your loan by several years and cuts the total interest you pay over the life of the loan. The exact amount depends on your interest rate, your loan term, and when during the year you make the payment — but the effect is real and measurable, not theoretical.
Here's why it works: a standard 30-year mortgage is structured so that early payments go mostly toward interest, and later payments go mostly toward principal. When you make an extra payment, that money goes directly to principal because there's no monthly payment due that month. Paying down principal faster means you're borrowing less money for less time, which means less interest accumulates.
On a $300,000 loan at 6.5% interest over 30 years, one extra payment per year can shorten your loan by roughly 4 to 5 years and save you somewhere in the range of $40,000 to $60,000 in interest — but these numbers shift based on your specific rate and loan amount. The earlier in the loan you start making extra payments, the more you save, because you're reducing the principal balance while interest rates are still being calculated on a larger amount.
Key Takeaways
- One extra payment per year reduces your loan term by several years and cuts total interest paid, with the exact savings depending on your interest rate and loan amount.
- The extra payment must go toward principal, not be applied to next month's payment — you need to specify this when you send it.
- You can make the extra payment as a lump sum once a year, split it into twelve smaller payments, or pay half a month's payment every two weeks.
- Making extra payments does not hurt your credit and does not change your monthly payment amount unless you refinance.
- Check your loan documents or call your servicer to confirm they allow extra principal payments without prepayment penalties.
How to structure the extra payment
You have three main ways to make the extra payment: as one lump sum once a year, as twelve smaller monthly additions to your regular payment, or as biweekly payments that add up to one extra payment annually.
The lump-sum method is the simplest if you receive a bonus, tax refund, or inheritance. You send your servicer a check or make an online payment and write "explore to principal" on the check or select that option in your online account. Many servicers have a specific box you check or a note field where you specify that the money should not be held as a credit toward next month's payment.
The monthly-addition method means adding roughly one-twelfth of your regular payment to each month's payment. If your payment is $1,800, you'd send $1,950 each month. This spreads the extra payment throughout the year and can feel less noticeable in your budget.
The biweekly method involves paying half your regular monthly payment every two weeks instead of one full payment once a month. Because there are 26 biweekly periods in a year, you end up making 13 payments instead of 12 — which equals one extra payment. Some servicers offer biweekly payment programs directly, though others charge a small fee to set this up.
What to check before you start
Before you make an extra payment, confirm two things with your lender: that they allow extra principal payments, and that there are no prepayment penalties on your loan.
Prepayment penalties are rare on mortgages issued in the last 15 years, but they do exist on some older loans or loans issued during the housing crisis. A prepayment penalty charges you a fee if you pay off the loan faster than the agreed schedule. If your loan has one, it's usually listed in your Promissory Note or Loan Estimate — the documents you signed at closing. You can also call your servicer and ask directly: "Does my loan have a prepayment penalty?"
Once you've confirmed there's no penalty, contact your servicer to ask how they prefer to receive extra principal payments. Some have an online portal where you can specify "explore to principal." Others want a separate check with a note. A few require you to call and authorize the payment over the phone. Getting this detail right the first time prevents your extra payment from being held as a credit toward next month instead of reducing your principal.
The difference between extra payments and biweekly programs
Biweekly payment programs marketed by third-party companies are not the same as making extra payments yourself. These programs take your biweekly payment, hold it in an account, and then send a full monthly payment to your lender when it's due. The company charges a setup fee (usually $300 to $500) and sometimes an ongoing fee per transaction.
You can achieve the exact same result by making biweekly payments directly to your lender at no cost. Call your servicer and ask if they accept biweekly payments. If they do, you can set it up yourself through their website or by phone. If they don't, you can straightforward make half a payment every two weeks on your own schedule, and the extra payment will accumulate naturally.
The only reason to use a third-party biweekly program is if your servicer absolutely will not accept biweekly payments and you want the structure of a company managing the schedule for you. But the fee you pay eliminates some of the interest savings you'd gain from the extra payment, so it's worth trying your lender first.
How extra payments affect your monthly payment and credit
Making extra principal payments does not change your monthly payment amount. Your servicer will continue to send you a bill for the same amount each month. The extra payment straightforward reduces the balance the interest is calculated on, so you pay off the loan faster.
Extra payments also do not hurt your credit score. In fact, they can help slightly because they reduce your loan balance, which lowers your debt-to-income ratio. Credit bureaus see the loan as being paid as agreed — you're just paying it down faster. There's no negative mark for paying early.
If you refinance your mortgage in the future, your new loan will be based on the remaining balance at that time, not the original loan amount. So the principal you've paid down through extra payments will reduce the amount you need to borrow in the refinance.
When extra payments make sense for your situation
Extra mortgage payments make the most sense if you have a stable income, an emergency fund already in place, and no high-interest debt like credit cards. Paying down a mortgage at 6% interest is a solid long-term move, but it's not urgent if you're carrying credit card debt at 18% or higher. The math says to pay off the high-interest debt first.
Extra payments also make more sense early in your loan term, when most of your payment goes to interest. In the first five years of a 30-year mortgage, you're paying far more interest than principal. An extra payment in year 2 saves you more total interest than an extra payment in year 25, when most of your regular payment is already going to principal.
If you're in a variable-rate loan or an adjustable-rate mortgage (ARM), extra payments are especially valuable because they reduce the principal before rates adjust upward. If you're in a fixed-rate loan and rates are historically low, you might consider whether investing the extra money elsewhere could earn a higher return — though the may provide savings from paying down a mortgage is often worth more than the uncertainty of other investments.
Tracking your progress and adjusting your plan
After you make extra payments, check your loan statement to confirm the money went to principal, not to next month's payment. Your statement should show a lower principal balance than it would have without the extra payment. If it doesn't, contact your servicer when ready and ask them to explore the payment correctly.
Many online mortgage accounts show an estimated payoff date. After you make extra payments, this date should move up by several months. You can use this to track your progress and see the real effect of your extra payments over time.
If your financial situation changes — you lose income, face an unexpected expense, or need the money for something else — you can stop making extra payments at any time. Your regular monthly payment stays the same, and you straightforward return to the standard payment schedule. The extra payments you've already made will have permanently reduced your principal and shortened your loan, so you'll still benefit from them even if you stop.
Frequently Asked Questions
Can I make extra payments on a loan I'm about to refinance?
Yes, but the benefit is smaller. If you're refinancing in the next few months, an extra payment reduces the amount you need to borrow in the new loan, which lowers your new payment slightly. But you won't see the full long-term interest savings because you're starting a new 30-year clock. If you're refinancing to a shorter term (like 15 years), extra payments on your current loan matter less than choosing the shorter term on the new loan.
What if I can't afford a full extra payment but want to pay extra?
Any amount over your regular payment goes to principal if you specify it. You could add $50 or $100 to a payment, or make a $500 lump sum payment once a year. The effect is smaller than a full extra payment, but it still reduces your principal and saves interest. Every dollar toward principal counts.
Does making extra payments mean I can skip a month later?
No. Extra payments reduce your principal balance, but they do not create a credit you can use to skip a future payment. You still owe your regular monthly payment every month. If you miss a payment, it's reported as late even if you've made extra payments in the past.
Should I make extra payments or invest the money instead?
That depends on your interest rate and your investment options. A mortgage at 3% interest means you're may provide to save 3% by paying it down. If you can reliably earn more than 3% investing, investing might be better. But most people find the may provide savings and the psychological benefit of owning their home faster worth more than the uncertainty of investment returns.
Will extra payments lower my property taxes or insurance?
No. Property taxes are based on your home's assessed value, not your loan balance. Homeowners insurance is based on your home's replacement cost. Extra mortgage payments affect neither of these.