PITI Explained: The Four Numbers Behind Your Real Mortgage Payment

What PITI Actually Stands For

PITI is the four-part breakdown of a full mortgage payment: principal, interest, taxes, and insurance. The principal and interest cover the loan itself, while taxes and insurance are the ongoing costs of owning the property that most lenders collect alongside the loan through an escrow account.

The reason the acronym matters is that a loan quote usually advertises only principal and interest. That number looks affordable in isolation, but it is not what leaves your account each month. PITI is the true monthly obligation, and for an investor it is the figure that determines whether a rental actually cash flows.

The PITI Formula

Principal and interest come straight from the amortization schedule and stay level on a fixed-rate loan. The tax and insurance pieces are annual costs divided into monthly installments, which your servicer holds in escrow and pays on your behalf when they come due.

Because taxes and insurance are estimates, the escrow portion of PITI can change from year to year. A property tax reassessment or an insurance premium increase raises your payment even though the underlying loan never changed.

Why Investors Care About PITI More Than the Loan Quote

When you underwrite a rental, cash flow is rent minus every recurring cost. If you only subtract principal and interest, you overstate cash flow by the entire tax and insurance load, which in many markets is several hundred dollars a month.

PITI closes that gap by putting the two biggest fixed carrying costs into the monthly payment where you cannot forget them. A deal that pencils on principal and interest alone can turn negative once the full PITI is in the model.

What PITI Leaves Out

• HOA or condo dues, which some lenders track separately as PITIA.
• Private mortgage insurance on low down payment loans, though this is sometimes folded into the insurance line.
• Vacancy, repairs, capital expenditures, and property management, which are real costs but not part of the mortgage payment.
• Utilities you cover as the landlord rather than the tenant.
• Because of these gaps, PITI is the floor for your monthly cost, not the full operating picture.

Using PITI to Screen Deals Fast

A quick way to sanity check a rental is to compare monthly rent against PITI. If rent barely clears PITI, there is nothing left to absorb vacancy, repairs, and management, so the deal is almost certainly a loser once real operating costs land.

A common operator rule is to want rent well above PITI, often with enough cushion that the difference can still cover an additional 30% to 40% of rent in operating expenses and reserves. PITI gives you that first pass in seconds before you build a full model.

Frequently Asked Questions