If you’re self-employed, the home office tax deduction lets you write off between $5 and roughly $15 per square foot of dedicated workspace, depending on which IRS method you use. The simplified method caps out at $1,500 (300 square feet at $5 each). The regular method, based on your actual housing costs, has no square-footage ceiling and usually produces a larger deduction. Which one wins for you depends on your office’s share of your home, what you actually spend on housing, and how much your business earns.
Who Can Claim It
The deduction is aimed at sole proprietors, independent contractors, freelancers, and other self-employed taxpayers who file a Schedule C. Partners and certain S-corporation shareholders can also claim unreimbursed home office costs, though the filing mechanics are different.
W-2 employees generally cannot claim a home office deduction. The Tax Cuts and Jobs Act suspended the deduction for unreimbursed employee expenses starting in 2018, and legislation enacted in mid-2025 made that change permanent. If your employer reimburses your home office costs through an accountable plan, those payments are tax-free to you, but you don’t get a separate deduction.
Simplified Method: $5 Per Square Foot
The simplified method is exactly what it sounds like. Multiply the square footage of your office by $5, up to 300 square feet, for a maximum deduction of $1,500. A 200-square-foot office produces a $1,000 write-off. No utility bills to allocate, no insurance premiums to prorate, no depreciation schedule.
The trade-off: you can’t separately deduct home-related expenses like utilities, insurance, or repairs, and you forgo depreciation on the business portion of your home. If you use the office for fewer than 12 full months, the IRS averages your monthly allowable square footage across all 12 months, and a month only counts if you used the space for business on 15 or more days. Start using a 300-square-foot office on August 1, and you’d get credit for five months, bringing the annual deduction to $625 rather than $1,500.
Regular Method: A Percentage of Actual Costs
The regular method takes more work but usually produces a bigger number. Start by calculating your business-use percentage: divide the office’s square footage by your home’s total square footage. A 250-square-foot office in a 2,500-square-foot home gives you 10%.
Apply that percentage to your indirect expenses, meaning costs that benefit the whole home. Those include mortgage interest or rent, property taxes, homeowner’s insurance, utilities, and general repairs. A $2,400 annual electricity bill at 10% business use yields a $240 deduction. Direct expenses that benefit only the office are fully deductible. Paint the office for $500 and the entire $500 goes on your return.
Depreciation for Homeowners
Homeowners using the regular method can also depreciate the business portion of the home. The IRS treats a home office as nonresidential real property, depreciated straight-line over 39 years. Only the building’s value counts, not the land. If your home is worth $390,000 excluding land and your business-use percentage is 10%, the depreciable basis is $39,000, producing roughly $1,000 per year in depreciation.
Depreciation isn’t optional. The IRS treats you as having taken it whether or not you actually claimed it on your returns, which matters when you sell.
The Space Has to Qualify
Either method requires that the space is used exclusively and regularly for business. A spare bedroom that doubles as a guest room fails the exclusive use test, even if guests only stay twice a year. The space doesn’t have to be a separate room with a door; a clearly defined corner of a studio apartment can qualify, as long as nothing non-business happens there.
The space also has to be your principal place of business. That means it’s where you handle the core administrative and management work of your trade, and you have no other fixed location where you do a substantial amount of that work.
The Business Income Limit
Your home office deduction under the regular method cannot exceed your business’s gross income for the year. The IRS applies the limit in order: first, expenses you could deduct regardless of the home office, like the business portion of mortgage interest and property taxes; next, operating expenses tied to using the home, like utilities and insurance; depreciation comes last. If your business income can’t absorb all of it, the excess carries forward to future tax years, subject to the same limit then.
If you switch to the simplified method in a future year, any carried-over expenses freeze in place. You can’t use them until you switch back to the regular method.
What Selling Your Home Costs You
The Section 121 home sale exclusion lets you exclude up to $250,000 of capital gains ($500,000 for joint filers) when you sell your primary residence. If you claimed depreciation on a home office, though, you cannot exclude the portion of your gain equal to the depreciation you took (or were allowed to take) after May 6, 1997. That amount is taxed at up to 25% as unrecaptured Section 1250 gain.
Claim $8,000 in total depreciation over eight years and you’ll owe tax on that $8,000 at up to 25% when you sell, even if the rest of your gain is fully excluded. This is one reason some filers stick with the simplified method: no depreciation, nothing to recapture. If you expect to sell within a few years, the recapture cost may outweigh the annual savings from the regular method.
How to File
The form depends on your business structure and method.
- Sole proprietors using the regular method complete Form 8829, then carry the result to Schedule C (Form 1040), line 30.
- Sole proprietors using the simplified method enter the office square footage directly on Schedule C, line 30. No Form 8829 required.
- Partners report unreimbursed home office expenses on Schedule E (Form 1040) as unreimbursed partnership expenses, provided the partnership agreement requires you to pay them.
- S-corporation shareholders claim unreimbursed expenses on Schedule E and attach Form 7203 to track stock basis and any deduction limits.
Because the home office deduction reduces your net business profit, it lowers both income tax and self-employment tax. That makes it worth more per dollar than deductions that only cut income tax.
What to Keep
You’ll want precise measurements of the office and the whole home, Form 1098 for mortgage interest, property tax statements, rent receipts if you rent, utility bills, insurance statements, and receipts for repairs sorted into direct (office only) and indirect (whole house). A dated photograph or two of the office set up for work helps prove exclusive use, especially if the space is a partitioned area rather than a separate room. If you use the simplified method, a simple log of the days and hours you use the space supports the 15-day monthly threshold.
Keep everything for at least three years after filing, which is the standard IRS audit window. Seven years is a safer margin if you have room for the folder.