Operating expenses

The regular costs of running a rental property: taxes, insurance, property management, repairs, utilities the owner pays, and reserves. Doesn't include the mortgage payment.

Investment terms · Updated September 2026

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Part 1 of 4

Why a seller cares

Operating expenses are what it costs to run the rental, before the mortgage, and buyers compare your figure to their own rule of thumb. A seller's understated expenses are the first thing a buyer's underwriting corrects.

Part 2 of 4

A simple example

Your duplex's expenses last year: $3,400 taxes, $1,600 insurance, $2,100 repairs, $1,300 management, $1,250 reserves. About $9,650.

Operating expenses: a simple example
What countsWhat does not
Taxes, insurance, repairs, management, reservesThe mortgage
Utilities the owner paysDepreciation
Vacancy, sometimes shown separatelyCapital improvements, which are capitalized

Operating expenses are the cost of the building, not the cost of the loan.

Part 3 of 4

What people get wrong

That a low expense figure makes the building look better. Buyers underwrite their own, and a seller's number that is too low reads as a seller who does not know.

Part 4 of 4 · where to read next

Where it appears in the sale

What a definition is, and what it isn't

Keighbor is a software company, not a law firm, brokerage, or tax adviser. This is general information, not legal, tax, financial, or real estate advice about your sale. Your situation may differ. Before acting on a contract, disclosure, title, tax, or pricing question, ask an appropriately licensed professional in your state.

Written and researched by Keighbor Research · drawn from the reference glossary · how we research and check what we publish

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