One Extra House Payment A Year

How to Actually Use the Extra Payment Strategy Without Getting Confused

Most people have heard about making one extra house payment a year and know it shrinks their mortgage, but they get it wrong immediately. They send a full extra payment each year and wonder why nothing changes. The trick isn't sending more money. It's how you direct that money and when. The strategy is simple on paper: pay an additional month's mortgage principal once every twelve months. If your monthly payment is $1,400 and $1,100 of that goes to principal, you're looking at roughly $13,200 in extra principal reduction over a year. That shaves anywhere from two to five years off a 30-year loan depending on your rate and balance. I've seen it cut 4.2 years off a loan at 6.5% on a $280,000 balance, but numbers vary and nobody should treat my example as a guarantee. The confusion comes from people treating "one extra payment" as "send an extra $1,400 check once a year." That's not efficient. Here's what works.

The Method That Actually Works

Set up a separate savings account called something boring like "Mortgage Accelerator." Each month, redirect a portion of your payment into that account. Aim for an amount that totals one full monthly payment by December. Then in January or February, submit a single principal-only payment to your lender with a note attached. I recommend $117 a month if your payment is $1,400. That adds up to exactly $1,404 over twelve months. You can also do it weekly. Divide your monthly payment by 26 and pay that amount every Friday. By year's end you've made 26 payments instead of 24, which naturally creates the extra month without any special action. This is the half-pay method, and it's cleaner than the savings-account approach because it auto-pilots itself. Both methods require you to tell your lender the extra money goes to principal only. If you don't specify, they'll apply it to next month's payment or escrow and you get zero benefit. I learned this the hard way.

A Specific Problem I Ran Into

My lender, a regional credit union, automatically applied my extra payment to the upcoming billing cycle instead of principal. It sat there for three months reducing my next payment instead of my balance. I called them and had to request a principal-only reaplication. They agreed but said I'd need to submit a written change request each time I wanted to switch the application type. That's a real pain point. Their system treats "extra payment" as "advance payment" by default unless you override it in writing. Here's what I did: I opened a separate portal account for principal-only payments and uploaded a standing instruction. Once per quarter I'd confirm the instruction was still active. It took about four minutes each time. Some lenders let you set this permanently in their online portal. Check yours. If you can set a standing principal-only designation, do it immediately after your first extra payment. It saves you from repeating the phone call.

Common Pitfalls Beginners Miss

The biggest mistake is assuming every mortgage allows this. Some loans have prepayment penalties, especially adjustable-rate mortgages refi'd within the last few years. Check your note. If there's a penalty clause, calculate whether the interest savings still outweigh it. Usually they do after year three, but early on the penalty can eat the entire benefit. Another trap is ignoring escrow. Your monthly payment includes taxes and insurance. The extra payment should only target the principal portion. If you accidentally throw extra money at escrow, you haven't accelerated anything. Look at your most recent statement and find the principal line. Use that number, not the total payment. A third issue: lenders sometimes process your extra payment with a thirty-day delay before it hits the principal balance. That means your effective acceleration is slightly less than the math predicts. Not dramatic, maybe a few months over the life of the loan, but it's real. I tracked mine across two loans and the delay averaged 18 days between payment date and principal update.

When This Strategy Breaks

If your interest rate is below 4%, the math gets thin. The opportunity cost of paying down a low-rate mortgage versus investing that same money elsewhere can be negative. I've run the numbers and at 3.5% over a ten-year window, investing the extra principal payment into a broad index fund outperforms the mortgage payoff by roughly 2-3 percentage points annually. That's not a debate I'm going to win for anyone, just a factual observation. Similarly, if you're close to paying off your loan already — say fifteen years into a thirty-year mortgage — the extra payment strategy loses punch. You're mostly paying principal anyway at that point. The acceleration benefit is smaller because most of your regular payment is already hitting principal. It's still beneficial, just less dramatically so. If you're struggling to make your regular payment, this strategy is the wrong tool. It assumes you have surplus cash. Using debt to fund a mortgage acceleration strategy is circular and usually painful. There are better options in that case: refinance to a lower rate, extend the term, or talk to your lender about a hardship program.

What I'd Do Different Next Time

I'd set up automatic principal-only instructions before making my first extra payment instead of dealing with it reactively. I'd also track the principal balance monthly in a spreadsheet rather than waiting for the annual statement. Seeing the balance drop by a few hundred dollars each month makes the strategy feel concrete instead of abstract. There's no download link for this. It's a behavior, not a tool. But if you want a simple spreadsheet to track your progress, I use a basic amortization schedule with a column for "extra principal applied." That's it. You don't need fancy software. You need consistency and a clear understanding of where your extra money actually goes.