The home office deduction is available to self-employed people and business owners — not W-2 employees. To qualify, the space has to be used regularly and exclusively for business. The simplified method ($5/sq ft, max $1,500) is easier; the regular method usually saves more if your home expenses are high.
"Can I deduct my home office?" is one of the questions we hear most this time of year — usually right after a client converts a spare bedroom into a workspace or starts taking client calls from the kitchen table. The answer is yes, often, but the rules are stricter than people realize, and one detail trips up almost everyone: the exclusive use test.
Who actually qualifies
Since 2018, the home office deduction has been off-limits for traditional W-2 employees — even if you work from home full-time and your employer doesn't reimburse you. The deduction is only available to people who file:
- Schedule C — sole proprietors and single-member LLCs
- Schedule E — partners (in limited cases) and certain rental scenarios
- Form 1120-S / Schedule K-1 — S-Corp owners, but typically through an accountable plan reimbursement rather than a direct deduction (this is a common one we set up for clients)
If you have a side business and a W-2 job, you can still claim the deduction for the side business as long as the office is used for that business.
The two tests the IRS cares about
To qualify, the space has to pass both:
- Exclusive use. The area must be used only for business. A desk in the corner of your living room where the kids also do homework? Doesn't qualify. A guest bedroom that doubles as your office and hosts your in-laws every Christmas? Also doesn't qualify, technically. A dedicated room with a door that closes — or even a clearly defined corner used only for work — does.
- Regular use. You have to use the space on a continuing basis, not occasionally. Once a month doesn't cut it.
It also has to be your principal place of business, OR a place where you regularly meet clients, OR a separate structure on your property used for business (like a detached studio or garage office).
Simplified method vs. regular method
Once you qualify, you pick how to calculate the deduction.
Simplified method: $5 per square foot of office space, up to 300 square feet. Max deduction: $1,500. No depreciation, no need to track utilities. This is the right choice for most people with a small home office or who just don't want the recordkeeping.
Regular method: You calculate the percentage of your home used for business (office sq ft ÷ total sq ft) and apply that percentage to your actual home expenses — mortgage interest, property tax, utilities, insurance, repairs, and depreciation.
A real example: $1,500 vs. $4,200
Let's say Sarah runs a Schedule C consulting business out of a 200 sq ft home office in a 2,000 sq ft house — so 10% business use. Her annual home costs:
- Mortgage interest: $14,000
- Property tax: $4,500
- Utilities (electric, gas, water, internet): $4,800
- Homeowner's insurance: $1,400
- Repairs and maintenance: $1,800
- Depreciation on the business portion of the home: ~$1,500
Simplified method: 200 sq ft × $5 = $1,000.
Regular method: 10% of $26,500 in home costs + $1,500 depreciation ≈ $4,150.
For Sarah in the 24% bracket, that's the difference between roughly $240 and $996 in actual tax savings — every year. The regular method takes more recordkeeping, but on a real home it's usually worth it.
The deduction isn't risky if you actually qualify — it's risky when people stretch the "exclusive use" rule and can't back it up.
What the IRS pays attention to
Home office claims used to be a major audit flag. They're not anymore — millions of people legitimately work from home — but a few patterns still draw scrutiny:
- An office bigger than your business. A claimed 800 sq ft office attached to $20K of revenue raises eyebrows.
- A loss created by the deduction. The home office deduction generally can't be used to create a business loss; it's limited to your business income for the year. Excess can be carried forward.
- No corroborating evidence. Photos of the space, a floor plan with measurements, and a clean separation between personal and business use go a long way if questions ever come up.
The selling-your-home wrinkle
If you use the regular method and depreciate the business portion of your home, you'll have to recapture that depreciation as taxable gain when you sell — even if the rest of the gain qualifies for the $250K / $500K home-sale exclusion. This isn't a reason to avoid the deduction (the annual savings almost always outweigh the eventual recapture), but it's worth knowing before you sell.
If you're not sure whether your setup qualifies, or whether the simplified or regular method makes more sense for your numbers, we run this calculation for clients regularly as part of tax planning. Reach out and we'll take a look at your situation.