Home Office Deduction for the Self-Employed: Who Qualifies and How Is It Figured?
Published October 29, 2026
If you are self-employed and use part of your home regularly and exclusively for your business, you can usually deduct part of your home costs on Schedule C. There are two ways to figure it: the simplified method, which multiplies $5 by up to 300 square feet, or the regular method, which uses actual expenses and Form 8829. Either way, the space has to pass the same basic tests.
Who qualifies for the home office deduction?
Publication 587, Business Use of Your Home, says you must use a part of your home exclusively and regularly for your business. Exclusive means that space is used only for business, so a guest room that doubles as an office usually fails. Regular means ongoing use, not occasional use. A corner of the living room where the family watches television every evening usually fails the exclusive-use test.
The principal place of business rule is often misunderstood. Publication 587 says a home office can qualify if you use it exclusively and regularly for administrative or management activities of your business, and you have no other fixed location where you do substantial administrative or management work. You can do your client work elsewhere and still qualify, as long as the home office is where the business is run.
How does the simplified method work?
Under the simplified method, you multiply $5 by the square footage of the home used for business, up to 300 square feet. That caps the deduction at $1,500 for the year. You choose this method each year on a timely filed, original return. Publication 587 also notes what you give up: you cannot deduct depreciation or actual expenses for that space. Your mortgage interest and real estate taxes are treated as personal expenses, so you still claim them on Schedule A if you itemize.
How does the regular method work?
With the regular method, you total the year’s actual costs of keeping your home, such as rent or mortgage interest, property taxes, utilities, insurance, and repairs, and then apply the business percentage. Form 8829, Expenses for Business Use of Your Home, is the form for this. Its direct costs, like repainting only the office, go in one column, and indirect costs, like utilities, go in another. The percentage is usually the office square footage divided by the home’s total square footage. The result flows to Schedule C.
What is a worked example?
Illustration only, with made-up round numbers: Marcus is a self-employed bookkeeper who works from a 1,600-square-foot home. He uses a 200-square-foot room only for client work. For 2026, his home costs are $9,000 of mortgage interest, $3,000 of property taxes, $2,400 of utilities, and $1,200 of home insurance, for a total of $15,600.
Simplified method: 200 square feet × $5 = $1,000.
Regular method: 200 ÷ 1,600 = 12.5 percent. $15,600 × 12.5 percent = $1,950. This example leaves out depreciation to keep the math short, and depreciation would change the result.
On the regular method, the bigger number looks better, but the work is heavier. Marcus must keep records for every cost and work through depreciation and the gross-income limit. Under the simplified method, he would still deduct his mortgage interest and property taxes on Schedule A if he itemizes.
What is the most common mistake?
Claiming a room that is also used for personal life. A room with a sofa bed, a treadmill, or the kids’ homework table generally fails the exclusive-use test. The second common mistake is forgetting the income limit. Under the regular method, if your gross income from the home office is less than your business expenses, some costs such as utilities, insurance, and depreciation can be limited to that income. Publication 587 explains how any excess carries over to the next year.
What should I do next?
Use this short checklist before you pick a method:
- Measure the office space in square feet, and write down the total square footage of your home.
- Write one sentence describing how the room is used only for business, and who meets clients there, if anyone.
- Gather twelve months of home costs: rent or mortgage interest, property taxes, utilities, insurance, and repairs.
- Figure both methods, choose the larger allowable amount, and keep your worksheet and receipts.
If you would like help deciding which method fits your home and business, see how it works. This article is general information, not advice about your specific return.
Sources: IRS Publication 587, Business Use of Your Home (2025 returns edition), who qualifies (exclusive and regular use; principal place of business), simplified method ($5 per square foot, 300-square-foot limit), actual expenses and Form 8829, and gross income limit; Form 8829, Expenses for Business Use of Your Home; Schedule C (Form 1040) instructions; IRS Publication 334, Tax Guide for Small Business. This is general information, not advice about your specific return.
