You’re in the right place if your Closing Disclosure lists “prepaid interest” and you’re not sure why.
This guide explains what prepaid mortgage interest is, how lenders calculate it, and how to plan for it. I’ll keep it practical.
Prepaid interest is the interest you pay at closing. It covers the days between your closing date and the start of your first full payment period.
Lenders collect it so interest accrues correctly from the day your loan funds. You pay it as part of your mortgage closing costs.
Here’s the simple version.
Mortgage interest is paid in arrears. Each monthly payment covers the interest from the period before it.
So your first mortgage payment doesn’t cover the odd days at the start. Prepaid interest does.
That’s it. Don’t overthink it.
You’ll see it grouped with other prepaid items, such as property taxes and homeowners insurance. These are prepaid expenses you pay upfront.
(More on where to find it in Tip #2 below.)
The lender figures prepaid interest as a daily charge. This is called per diem interest.
Per diem is Latin for “per day.” It’s your daily interest charge multiplied by the number of days to cover.
Here’s how the interest calculation works.
Your lender’s method may differ slightly. Some use a 360-day year and others use 365. Ask which one applies to you.
Pro tip: Ask your loan officer for the per diem amount in writing. Then you can check the math yourself.
Interest accrual starts on your mortgage funding date. This is also called the loan disbursement date.
That date can differ from the day you sign. Your settlement agent will confirm when the money actually moves.
Here’s what to focus on: the funding date drives the day count, and the day count drives the cost.
You can spot prepaid interest on two key forms. Knowing where to look saves you stress.
The Loan Estimate arrives early in the process. It shows projected costs, including interest paid at closing.
The Closing Disclosure arrives before closing. It shows the final numbers.
Here’s where to check.
Numbers can shift between the two forms. The closing date is the usual reason.
[Image: Annotated Closing Disclosure page with the prepaid interest line highlighted]
Bad example: “My closing costs went up, and I have no idea why.”
Good example: “My closing date moved, so the prepaid interest adjustment changed. I confirmed the new per diem with my lender.”
Ask early. Questions cost nothing.
Useful resource: The Consumer Financial Protection Bureau (CFPB) publishes plain-language guides to the Loan Estimate and Closing Disclosure.
Your closing date changes how many days of interest you prepay. This is the one lever you can often pull.
In general, closing earlier in a payment cycle means more days to cover. Closing later means fewer days.
Here’s the catch. A later closing date doesn’t always mean you save money overall. Your lender, seller, and settlement agent all affect timing.
Think about the whole picture.
That last point matters. An interest rate lock protects your rate for a set period. Closing after it expires can cost you more than you save.
(We cover rate decisions in Tip #4.)
I’m Steven Alender, and I walk borrowers through this on every loan. I ask about their timeline first. Then we choose a closing date that works for the whole deal, not just one line item.
Don’t pick a date only to shrink one fee.
Your loan details affect your per diem. Bigger principal means a bigger daily charge. A higher rate does the same.
Several choices come into play.
Loan programs matter too. A conventional mortgage, an FHA loan (backed by the Federal Housing Administration), a VA loan (backed by the Department of Veterans Affairs), and a USDA loan (backed by the U.S. Department of Agriculture) all follow similar interest accrual rules. Program rules on who can pay which costs can differ.
Your loan-to-value ratio (LTV) shapes your borrowing terms during mortgage underwriting. It can influence your rate, which feeds back into the per diem.
[Image: Simple chart showing how principal, rate, and days combine into prepaid interest]
Here’s the takeaway. Compare the annual percentage rate (APR), not just the interest rate. The APR reflects more of the loan’s cost, including certain fees.
Ask your mortgage lender to show you both.
Prepaid interest is one piece of your cash to close. Plan for it early so it never surprises you.
Here’s how it fits in.
First, the money is not an extra loan cost. It is real interest on your outstanding loan balance, paid in advance.
Second, it doesn’t reduce your balance. The principal portion of your mortgage payment does that.
Third, your first payment may be due later than you expect. That’s normal. The prepaid interest covered the earlier days.
Your amortization schedule, also called a loan repayment schedule, shows how each monthly mortgage payment splits. The interest portion of each mortgage payment is usually larger early on. The principal portion grows over time.
Your loan servicer handles mortgage servicing after closing. That includes collecting payments and managing your escrow account. The escrow account holds funds for property taxes and homeowners insurance.
Your promissory note spells out your repayment terms. It’s the legal document where you, the mortgage borrower, promise to repay.
Mortgage interest may be tax-deductible, and that can include interest paid at closing. The IRS mortgage interest deduction has rules, so talk to a tax professional. Your lender sends a mortgage interest statement (Form 1098) each year.
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If you consider mortgage refinancing later, expect prepaid interest again. A new loan has a new funding date. Your mortgage payoff amount on the old loan also includes interest through the payoff date.
Pro tip: Before closing, ask your lender for a full list of prepaid items. Check them against your Closing Disclosure.
Start by asking your lender for your Loan Estimate and the per diem amount.
Then review your Closing Disclosure and compare each prepaid line.
Pick a closing date that fits your whole plan, not just one fee.
If you want a second set of eyes, contact Steven Alender, NMLS #214080. Call (805) 796-5626 or email salender@hoothomeloans.com.
