To make biweekly mortgage payments, either enroll in a biweekly program through your loan servicer or replicate one yourself by adding one-twelfth of your monthly principal-and-interest amount to each monthly payment and marking that extra money “principal only.” Both approaches produce the same result: the equivalent of 13 monthly payments a year instead of 12, with the extra payment going straight to your loan balance.1Consumer Financial Protection Bureau. How Do Mortgage Lenders Calculate Monthly Payments? Which route makes sense depends on whether your servicer offers a program, what it costs, and how much of the process you want to control yourself.
Why Biweekly Payments Work
A standard mortgage calls for 12 monthly payments per year. Split each payment in half and pay every two weeks, and the calendar produces 26 half-payments annually — the equivalent of 13 full monthly payments rather than 12. That thirteenth payment goes entirely to principal, which is where the interest savings and faster payoff come from.
The mechanics are the same on any loan. Bigger balances and higher rates produce bigger dollar savings, but the structure of the acceleration doesn’t change.
Check for a Prepayment Penalty Before You Start
Before changing anything, confirm your loan doesn’t penalize you for paying ahead of schedule. For qualified mortgages originated after January 10, 2014, federal rules heavily restrict prepayment penalties. A penalty is allowed only when the loan has a fixed APR, meets qualified-mortgage standards, and is not classified as a higher-priced mortgage loan. Even where allowed, it can apply only during the first three years, capped at 2 percent of the prepaid balance during the first two years and 1 percent during the third year.2eCFR. 12 CFR 1026.43 – Minimum Standards for Transactions Secured by a Dwelling
If your mortgage predates 2014, those federal restrictions don’t apply retroactively. Check your original loan documents or call your servicer. For most recent loans this is a non-issue, but two minutes of confirmation beats a surprise charge.
Option 1: Enroll Through Your Servicer
The cleanest path is signing up for a biweekly program with the company that services your loan. Not every servicer offers one, so start by logging into your online account or calling customer service to ask.
If a program exists, you’ll need a few things on hand:
- Your mortgage account number, listed near the top of your monthly statement.
- Your bank routing and account numbers, since biweekly programs run on automatic ACH withdrawals.
- Your current principal-and-interest amount. Divide it by two to get the biweekly figure. Escrowed taxes and insurance are typically handled separately.
The servicer will send you an authorization form, often called something like “Biweekly Authorization” or “ACH Debit Agreement.” You choose a start date that fits your paycheck cycle and submit the form through the online portal or by mail. Expect a verification period where the servicer confirms your bank account and schedules the first draft. Many servicers require one final standard monthly payment before the biweekly schedule kicks in, so watch the account closely during the transition to avoid a missed payment.
Some servicers charge a setup fee, and a few add a small per-transaction charge on each debit. Fees vary widely. Ask for the full fee schedule in writing before you sign anything, and compare the annual cost against the interest you expect to save. If the fees eat up most of the benefit, skip the program and use the DIY method instead.
Option 2: Do It Yourself With Extra Principal Payments
If your servicer doesn’t offer a program, or the fees make it unattractive, you can produce the same result on your own. The goal is one extra monthly payment per year, directed at principal. Two approaches work well.
Add a Twelfth to Each Monthly Payment
Divide your monthly principal-and-interest payment by 12 and add that amount to every check. On an $1,800 payment, that’s an extra $150 a month. Over a year, the additions equal one full payment. This is the easiest method to automate through your bank’s bill-pay feature, and the cost is spread evenly.
Save Up and Pay a Lump Sum
Set up an automatic transfer from checking into a separate savings account. Accumulate one full payment’s worth over the year, then submit it as a single extra payment when you’re ready. This suits uneven income or borrowers who want the money to stay liquid until they’re sure they won’t need it for an emergency.
Whichever method you use, labeling matters. Designate the extra money as a principal-only payment. If your servicer’s online portal has a payment-type dropdown, choose the principal-only option. If you’re mailing a check, write “Apply to principal only” in the memo line. Without that instruction, the servicer may treat the extra funds as an early payment for the following month, which does nothing to your balance.
Option 3: Third-Party Biweekly Services
Third-party companies market biweekly programs to borrowers whose servicers don’t offer one. The typical arrangement: the company pulls half your payment from your bank every two weeks, holds the funds, forwards a full monthly payment to your servicer, and sends the accumulated thirteenth payment as a lump-sum principal payment once a year.
The catch is cost. These services typically charge a setup fee in the range of $200 to $400 plus a small transaction fee on each debit. Over time those fees can consume much of the interest savings. There’s also a timing risk: because the intermediary holds your money before forwarding it, a delayed transfer could cause a late mortgage payment, and you remain responsible even if the third party is the reason. If you use one of these services, monitor your mortgage statement monthly to confirm payments are posting on schedule. For most borrowers the DIY method produces the same outcome for free.
Don’t Just Start Sending Half-Payments
Sending true half-payments straight to your servicer without enrolling in a formal program is the one approach that can backfire. A servicer is generally not required to accept a payment smaller than the full periodic payment covering principal, interest, and escrow.3Consumer Financial Protection Bureau. My Mortgage Servicer Refuses to Accept My Payment. What Can I Do? When a servicer receives a partial payment, it can return the money, hold it in a suspense account until enough accumulates to cover a full payment, or credit it directly. The suspense account outcome is the most common and the most dangerous. Money sits there earning nothing, and if a full periodic payment isn’t assembled by the due date, you can be reported late.
Federal rules require servicers to disclose funds held in a suspense account on your periodic statement.4Consumer Financial Protection Bureau. 12 CFR 1026.41 – Periodic Statements for Residential Mortgage Loans Once enough money accumulates to cover a full payment, the servicer must credit it as of the date the balance reached that threshold.5Consumer Financial Protection Bureau. 12 CFR 1026.36 – Prohibited Acts or Practices and Certain Requirements for Credit Secured by a Dwelling The gap between when you sent the money and when it gets credited can still generate late fees or negative credit reporting. That’s why adding extra to a full monthly payment is safer than mailing in unsolicited half-payments.
Confirm the Money Is Going to Principal
The most important step after any setup change is verifying that your extra funds are being applied to principal rather than escrow or a future month’s payment. Check your mortgage statement the month after your first extra payment posts. If the principal balance dropped by more than the scheduled amortization amount for that month, the system is working. If it didn’t, call the servicer right away.
Escrow deserves particular attention. If your monthly payment bundles property taxes and homeowners insurance, make sure additional funds aren’t being routed into the escrow account. Money in escrow doesn’t reduce your loan balance. When you set up a new payment arrangement, confirm with the servicer that any additional funds are applied to principal.
An Added Benefit: Dropping PMI Sooner
If you’re still paying private mortgage insurance, biweekly payments give you a faster path off it. Under the Homeowners Protection Act, your servicer must automatically cancel PMI on the date your principal balance is scheduled to reach 78 percent of the home’s original value, as long as you’re current on payments. You can also request cancellation once the balance reaches 80 percent of original value based on actual payments made.6Consumer Financial Protection Bureau. Homeowners Protection Act (PMI Cancellation Act) Procedures
Because the extra annual payment goes straight to principal, you’ll reach both thresholds ahead of the original amortization schedule. On a 30-year loan that can mean shedding PMI a year or two earlier than planned, on top of the interest savings from the accelerated payoff.