Making One Extra Mortgage Payment Each Year
What happens when you pay an extra mortgage payment once a year
One extra mortgage payment per year reduces the total interest you pay over the life of your loan and shortens how long you owe money. Because mortgage interest compounds daily, paying principal faster means less interest accrues on the remaining balance. A single extra payment applied to principal can save tens of thousands of dollars depending on your loan amount, interest rate, and how many years remain.
The mechanics are straightforward: you send a payment equal to your regular monthly payment, but you instruct your lender to apply it entirely to principal rather than splitting it between principal and interest as a normal payment would. Some lenders call this a "principal-only payment" or "extra payment." The result is that you pay down the loan faster without changing your monthly payment amount.
The timing and method matter. Some people make this payment in a lump sum when they receive a tax refund or bonus. Others divide it into smaller amounts and add it to their regular payment each month. Both approaches work, but the lump-sum method saves slightly more interest because the principal reduction happens all at once.
Key Takeaways
- One extra payment per year applied to principal can reduce your loan term by several years and save significant interest over time.
- You must tell your lender to apply the payment to principal only, not to next month's payment or interest, or the benefit is lost.
- The savings depend on your interest rate, remaining loan balance, and years left on the mortgage — higher rates and longer terms mean bigger savings.
- Making extra payments does not change your required monthly payment, so you can stop at any time without penalty.
- Some lenders charge fees for extra payments or restrict how many you can make per year, so check your loan documents first.
How much interest and time you actually save
The dollar amount saved varies widely based on three factors: your interest rate, your remaining loan balance, and how many years are left on your mortgage. A borrower with a $300,000 loan at 4% interest with 25 years remaining will see a different outcome than someone with a $200,000 loan at 6% with 15 years left. Because these numbers change for every person, there is no single "savings amount" that applies to everyone.
What is consistent is the direction: higher interest rates produce larger savings from extra payments, and longer loan terms mean more time for compounding to work in your favor. A rough way to think about it: one extra payment per year typically shortens a 30-year mortgage by 3 to 5 years, depending on the rate. The interest saved is the difference between what you would have paid over the full original term and what you pay with the shortened term.
You can calculate your specific savings using a mortgage payoff calculator by entering your loan amount, rate, remaining term, and the extra annual payment. Many lenders also provide this calculation on request. The point is to verify the math before committing to the extra payment, especially if your budget is tight.
How to instruct your lender to apply the extra payment correctly
Contact your lender in writing — email, online portal message, or certified mail — and state clearly that you want to make an extra payment applied entirely to principal. Do not assume a payment labeled "extra" will be handled correctly. Some lenders default to applying it to next month's payment or to interest first, which defeats the purpose.
Include in your written request: your loan number, the payment amount, the date you plan to send it, and the explicit instruction that it should reduce principal only. Ask for written confirmation that your lender understands and will process it as you specified. Keep this confirmation in your records.
When you send the payment, include a note with the same instruction. If you pay online, use the memo field or send a separate message. If you mail a check, include a letter. The goal is to create a paper trail so there is no confusion about your intent. After the payment posts, verify on your statement that the principal balance decreased by the full payment amount, not just part of it.
Lender restrictions and fees you should know about
Some mortgages, particularly older loans or those with specific loan types, include restrictions on extra payments. A few lenders charge a fee for payments beyond the regular monthly amount, though this is uncommon in modern mortgages. Some loans limit you to a certain number of extra payments per year or require a minimum payment amount.
Check your promissory note and loan agreement for language about "prepayment penalties" or "prepayment restrictions." If your loan was issued before 2010 or is a specialized product (ARM, interest-only, or certain portfolio loans), ask your lender directly whether extra principal payments are allowed and whether any fees apply. A five-minute phone call can prevent a payment from being rejected or misapplied.
Federal law prohibits prepayment penalties on most mortgages issued after 2010, but older loans and some niche products may still have them. If your loan does carry a penalty, the math changes: you would need to calculate whether the interest saved by paying off early exceeds the penalty cost. In most cases it does not, so you would skip the extra payment strategy.
Monthly versus lump-sum: which approach saves more
Dividing the extra payment into twelve smaller amounts and adding it to your regular payment each month is simpler to manage and works well if you have steady income. Sending one lump sum once per year saves slightly more interest because the principal reduction happens immediately, and interest stops accruing on that amount right away.
The difference between the two methods is small — usually a few hundred dollars over the life of the loan — so the better choice is whichever one you will actually stick with. If a lump sum feels risky because your budget is unpredictable, the monthly approach is safer. If you receive a predictable bonus or tax refund, the lump-sum method is easier to execute and slightly more efficient.
Some people use a hybrid: they add a small amount to their regular payment each month and then send a larger lump sum when they receive a windfall. This combines consistency with the interest savings of a larger principal reduction. The key is that every dollar goes to principal, not to interest or next month's payment.
When extra payments make sense and when they do not
Extra mortgage payments are most valuable when your interest rate is high (5% or above), you have a long time remaining on the loan, and your budget has room for the additional payment without cutting into emergency savings or other financial goals. They also make sense if you have no high-interest debt like credit cards or personal loans, because paying down a 4% mortgage while carrying 18% credit card debt is not the best use of your money.
Extra payments are less urgent if your interest rate is very low (below 3%), your loan term is already short, or you have other financial priorities. If you are carrying credit card debt, have no emergency fund, or are not yet saving for retirement, those should come first. A mortgage at 2.5% is not costing you much in interest, so the opportunity cost of using that money elsewhere may be higher.
Consider also your tax situation. Mortgage interest is tax-deductible for many homeowners, which lowers the true cost of borrowing. If you are in a high tax bracket and deduct your mortgage interest, the after-tax cost of your loan is lower than the stated rate, which reduces the benefit of paying it off early. A tax professional can help you weigh this.
Alternatives if extra payments do not fit your budget
If you cannot afford a full extra payment but want to reduce interest, adding even $50 or $100 to your regular payment each month accomplishes the same goal over time. The total interest saved will be smaller, but the strategy still works and is easier to sustain if money is tight.
Another option is to make extra payments only in years when you have surplus income — a bonus, inheritance, or tax refund. This keeps your regular budget unchanged while still taking advantage of opportunities to pay down principal when you can. Some people commit to one extra payment every other year instead of annually, which is less aggressive but still meaningful.
If your mortgage rate is very low and you have other financial goals, investing the money instead of paying down the mortgage may produce better returns. A financial advisor can help you compare the may provide return of paying off a 3% mortgage against the potential return of investing in a diversified portfolio. The math depends on your risk tolerance and time horizon.
Frequently Asked Questions
Will making one extra payment per year change my monthly payment amount?
No. Your required monthly payment stays the same. The extra payment is separate and reduces your principal balance faster, which means you pay off the loan sooner and pay less total interest. You can stop making extra payments at any time without affecting your regular payment obligation.
What if I pay extra but my lender applies it to next month's payment instead of principal?
Contact your lender immediately and ask them to reverse the transaction and reapply it correctly. This is why written instruction and confirmation are important. If the lender refuses to correct it, file a complaint with your state's banking regulator or the Consumer Financial Protection Bureau.
Can I make more than one extra payment per year?
Yes, unless your loan documents restrict it. Check your promissory note or call your lender to confirm there are no limits or fees. Making two or three extra payments per year will shorten your loan term and save interest even faster than one payment annually.
Does paying extra hurt my credit score?
No. Paying down a mortgage faster does not harm your credit. Your credit score is based on payment history, credit utilization, and other factors, but paying principal faster is not penalized. In fact, paying on time and reducing debt can support a healthy credit profile over time.
What if I need the money back later — can I borrow against the extra principal I paid?
You can refinance or open a home equity line of credit to access the equity you have built, but this requires a new application and approval. It is not automatic. If you think you might need access to cash in the next few years, keep that money in savings rather than putting it toward your mortgage.