The Home Office Deduction: Your Dining Table Does Not Count

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: Self-employed people with a space used regularly and exclusively for business can deduct a home office: $5 per square foot up to 300 square feet, or actual expenses by percentage. W-2 employees generally cannot.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

The home office deduction has a reputation as an audit magnet, which is a bit like saying umbrellas attract rain. What actually attracts trouble is claiming the dining table where you also eat dinner, help with homework and fold laundry. The tax code is 4 million words long; you need about 400 of them to claim a home office correctly, and most are in IRS Publication 587.

This guide covers who is eligible, the simplified and actual-expense methods, depreciation and what happens when you sell the house, and the bad news for W-2 employees. Figures and rules are federal, as of Oct 2026.

CPA Warning Label: Exclusive use is the test that sinks most claims. Measure the space, photograph it, and do not let it double as a guest room.

Eligibility: regular, exclusive and principal

To deduct a home office, part of your home must be used:

• Exclusively for business. A room or a clearly defined area used for nothing else. A desk corner can qualify if that space is only used for work; the couch next to it does not.
• Regularly, not occasionally.
• As your principal place of business, or a place where you meet clients or customers in the normal course of business, or a separate structure (like a detached studio) used for business.

A home office can be your principal place of business even if you do some work elsewhere, as long as you use it for administrative or management activities and have no other fixed location where you conduct substantial administrative work. A contractor who works on job sites but does all scheduling and billing at home can qualify.

There are exceptions to exclusive use for storing inventory or product samples and for licensed daycare facilities.

The deduction cannot exceed the gross income from the business use of the home minus other business expenses. With the actual method, excess deductions carry forward; with the simplified method, they do not.

The simplified method

The simplified method is $5 per square foot of business space, up to 300 square feet, for a maximum deduction of $1,500 per year. You do not track utilities or depreciation, and there is no depreciation recapture later because no depreciation is claimed.

You still deduct mortgage interest and property taxes in full on Schedule A if you itemize, since none of it is allocated to the office. You can switch between methods from year to year.

Who should use it: renters with small offices, people who value simplicity, and anyone whose actual-expense result would be close to $1,500 anyway.

The actual expense method

With the actual method on Form 8829, you calculate a business-use percentage, usually office square feet divided by total home square feet, and apply it to indirect expenses:

• Mortgage interest and real estate taxes (the business share moves from Schedule A to Schedule C)
• Rent, if you rent
• Homeowners or renters insurance
• Utilities: electricity, gas, water, trash
• General repairs and maintenance
• Depreciation on the building portion of the home (not land), generally over 39 years as nonresidential real property

Direct expenses that only benefit the office, like painting the office, are 100% deductible. Expenses that only benefit other parts of the home, like landscaping, are not deductible at all.

Example math: a 200-square-foot office in a 2,000-square-foot home is 10%. If rent is $24,000 a year and utilities and insurance are $4,000, the deduction is $2,800, versus $1,000 under the simplified method ($5 × 200).

Internet and phone are handled separately from the home office, by their business-use percentage, under either method.

Depreciation recapture when you sell

Homeowners using the actual method claim depreciation on the office portion. That has a sting at sale time. The Section 121 home sale exclusion ($250,000 single, $500,000 joint) does not shelter gain equal to depreciation claimed after May 6, 1997. That portion is taxed as unrecaptured Section 1250 gain at up to 25%.

Depreciation is "allowed or allowable," meaning if you were entitled to depreciation and did not claim it, the IRS treats you as if you had for recapture purposes. Skipping depreciation does not avoid recapture.

Good news: if the office was inside the home, not a separate structure, you do not need to allocate the gain between business and personal use. Only the depreciation is taxable; the rest of the gain can still qualify for the exclusion. See our Section 121 home sale exclusion guide.

A typical home office's depreciation is modest. On $300,000 of building basis, a 10% office is $30,000 of basis, or about $769 a year over 39 years. Ten years of that is roughly $7,700 recaptured at up to 25%, about $1,900 of tax. Compare that against the extra deductions over the same decade before choosing a method.

W-2 employees: mostly out of luck

Before 2018, employees who worked from home for their employer's convenience could deduct unreimbursed home office costs as a miscellaneous itemized deduction. The 2017 law suspended that, and the 2025 law made the disallowance permanent, as the IRS noted in Notice 2026-10 when discussing unreimbursed employee expenses.

So a W-2 employee working from home in 2026 generally cannot deduct a home office, even if the company has no office. Options:

• Ask your employer for reimbursement under an accountable plan, which is tax-free to you.
• If you also have self-employment income, a home office used exclusively for that side business may qualify.
• Some states still allow unreimbursed employee expense deductions on state returns. Check your state.

S corporation owner-employees are employees too. They generally get home office benefits through an accountable plan reimbursement, not a personal deduction.

Records and common mistakes

The home office deduction is not inherently risky, but it is easy to get sloppy. Keep:

• A floor plan or simple sketch with measurements of the office and the whole home.
• Dated photos showing the space set up as an office, with no bed, toys or treadmill.
• Utility bills, insurance statements, mortgage interest statements (Form 1098) and property tax bills.
• A depreciation schedule showing the building basis, the date the office was placed in service and the depreciation claimed each year. You will need it when you sell.

Mistakes that turn up again and again:

• Claiming a percentage of the whole home instead of the office area.
• Including land in depreciable basis. Land never depreciates.
• Deducting more than the business earned. The gross income limit applies; excess actual expenses carry forward.
• Double-dipping mortgage interest on both Schedule A and Schedule C.
• Forgetting the office when moving. Partial-year offices get prorated by months used.
• Claiming a home office for a hobby. No business, no business use of home.

Landlords running rental businesses from home have their own twist on these rules; see home office for landlords.

Illustration: picking a method

Morgan is a self-employed editor who owns a 1,800-square-foot home and uses a 180-square-foot spare room exclusively as an office (10%). Annual costs: mortgage interest $12,000, property tax $5,000, insurance $1,600, utilities $3,000. Building basis (excluding land) is $270,000.

Morgan takes the standard deduction, so the mortgage interest and property tax shifted to Schedule C under the actual method would otherwise produce no benefit at all. That makes the actual method much more attractive: about $1,952 of extra Schedule C deductions, which reduce both income tax and SE tax. The recapture later is modest by comparison. Illustrative figures only.

A renter's math is different again: there is no depreciation and no recapture, so the actual method's only cost is the paperwork. If the rent share comfortably beats $1,500, the actual method is usually worth the extra half hour with Form 8829.