How Do I Split a Mortgage Payment Into Principal, Interest, and Escrow?

Why isn’t the whole payment an expense?

Because most of it isn’t spending. A mortgage payment moves money in three directions at once, and only one of those directions is a genuine cost of running the property. Book the full amount to a single “mortgage expense” account and two things go wrong at the same time: your P&L overstates expenses, and your books lose track of how much equity you are actually building.

This is one of the more common setup mistakes we see in a rental chart of accounts, alongside lumping repairs in with capital improvements. We cover the full account structure in What Is the Right Chart of Accounts for a Rental Property?, but the mortgage line deserves its own explanation, because the fix is not about naming an account correctly. It is about understanding what each dollar in the payment is doing.

What are the three pieces of the payment?

Every amortizing mortgage payment breaks into up to three components, and each one belongs somewhere different in your books.

• Interest. The cost of borrowing the money. This is a real expense, deductible in the year paid, and it belongs in an interest expense account.
• Principal. The portion that reduces what you owe the lender. This is not a cost. It is a liability paydown, moving the loan balance on your balance sheet down and your equity up. Booking it as an expense hides the fact that you are building wealth with every payment, not just spending money.
• Escrow. If your loan requires it, a slice of the payment goes into an account the servicer holds and later uses to pay property tax and insurance bills on your behalf. Until the servicer actually pays one of those bills, escrow is not an expense. It is cash that is still yours, just sitting somewhere else.

“A mortgage payment is not an expense with a number attached. It is three different transactions wearing one bank line.”

Not every property has escrow, and some payments (a loan that has paid off, an interest-only period) will not have all three pieces every month. The split changes; the principle does not.

Where do I find the split each month?

Your loan servicer already did this math. The monthly mortgage statement shows the payment broken into principal, interest, and escrow, along with the running loan balance and the escrow account balance. That statement is the source document for the entry, not the bank feed and not the payment amount alone.

For an example, say a monthly payment of $1,500 breaks down on the statement as $350 to principal, $800 to interest, and $350 to escrow. Only $800 of that $1,500 is a true monthly expense. The other $700 is balance sheet activity: $350 reducing debt, $350 sitting in a holding account.

At year end, your lender sends Form 1098, which totals the interest paid for the year. That figure is what your CPA works from for the return; your monthly entries are what get you there without a December scramble. How the escrow bills eventually get treated on the return, and any adjustments for prepaid or estimated amounts, is a question for your CPA. What we handle is making sure the books that feed that conversation are accurate all year.

How do I book it in Stessa or QuickBooks?

The mechanics are the same idea in either platform: split the one bank transaction into its component parts instead of categorizing it as a single line.

1. Pull the current month’s mortgage statement and read the principal, interest, and escrow amounts directly off it.
2. Split the transaction where your payment hits the bank feed. In Stessa, split the payment into separate line items; in QuickBooks Online, split the transaction across accounts on the same banking entry.
3. Assign each piece so only interest lands on the P&L. Interest goes to your mortgage interest expense category. Principal and escrow both stay off the P&L: in Stessa, use its mortgage principal and escrow categories, which are excluded from expenses; in QuickBooks Online, principal reduces the loan liability account and escrow sits in an escrow asset account, since the servicer has not spent it yet.
4. Tag the property so the interest expense and the loan balance both show up correctly on that property’s numbers, not lumped into a portfolio-wide total.
5. When the servicer pays a bill from escrow (property tax, insurance premium), record that payment as the actual expense, insurance or property tax, and reduce the escrow balance by the same amount. That is the moment escrow money becomes an expense, not a moment sooner.

Whichever platform you use (our Stessa vs. QuickBooks Online comparison covers choosing between them), the discipline is the same: work from the source document, not the bank memo line, every single month.

The Bottom Line

A mortgage payment is one bank line and three destinations: interest is a real expense, principal builds equity, and escrow is parked cash until the servicer spends it on your behalf. Split every payment that way and your P&L stops overstating what the property costs to run, while your balance sheet finally shows the equity you are actually building.

The exact tax treatment of interest, and any escrow-related adjustments, is your CPA’s call at filing time. Clean, split monthly entries and Form 1098 are what make that conversation quick instead of a reconstruction project.