Two methods, pick the bigger
The IRS allows two methods for the home office deduction. You pick whichever produces the larger deduction — and you can switch year to year.
Simplified method (§280A safe harbor)
- $5 per square foot of office space, capped at 300 sq ft — maximum deduction $1,500/year
- No need to track utility bills, rent, or depreciation
- No depreciation recapture when you sell the home (homeowners)
- Filed on Schedule C Line 30 (no Form 8829 required)
- Best for small offices and renters who want zero paperwork
Actual method (Form 8829)
- Calculate business-use percentage = office sq ft ÷ total home sq ft (or hours-of-use method for partial-use space)
- Apply that percentage to home expenses: rent or mortgage interest, utilities, insurance, property tax, repairs, depreciation
- Direct expenses (paint for the office, dedicated phone line) are 100% deductible without the percentage
- Filed on Form 8829, attached to Schedule C
- Best for larger offices, expensive markets, and owners with depreciation
Quick rule of thumb
- Office under 100 sq ft, total home expenses under $20k/yr: simplified usually wins
- Office 100-300 sq ft, expensive city (NYC/SF/LA), high rent: actual almost always wins
- Office over 300 sq ft: simplified caps at $1,500 (300 × $5) — actual wins for any meaningful percentage
Eligibility — the 3-part test
Per IRC §280A and IRS Publication 587, you can claim the home office deduction only if:
- Exclusive use: the space is used ONLY for business. A guest room that doubles as an office on weekends fails. A dedicated 8x10 corner of the living room used only for work passes.
- Regular use: used regularly for business — not occasionally. A few hours a year doesn't count.
- Principal place of business: the home office is your primary work location, OR you meet clients/customers there, OR it's a separate structure (detached studio).
Three exceptions waive the exclusivity test:
- Daycare facility in your home (subject to time-allocation rules)
- Storage of inventory or product samples (must be sole fixed location of the business)
- Certain rental real estate operations
What W-2 employees should know
Important: W-2 employees cannot claim the home office deduction for unreimbursed work-from-home expenses. The Tax Cuts and Jobs Act eliminated miscellaneous itemized deductions through 2025; OBBBA (P.L. 119-21) made this permanent. The home office deduction is exclusively for self-employed taxpayers (Schedule C, Schedule E rentals, Schedule F farms) and certain S-corp owners under accountable plan reimbursement. 1099 vs W-2 implications.
S-corp owners: use an accountable plan
S-corp shareholders can't claim the home office deduction directly on the personal return — but the corporation can reimburse you for home office expenses under an accountable plan, which is fully deductible to the corp and tax-free to you. The reimbursement uses the same actual-method calculation but the paperwork lives with the corp.
Watch out for depreciation recapture (homeowners)
If you use the actual method and claim depreciation on the home structure, the IRS recaptures it as ordinary income (up to 25%) when you sell — even if you'd otherwise qualify for the §121 home sale exclusion ($250k/$500k tax-free gain). The simplified method avoids this entirely. For homeowners planning to sell within 5 years, simplified is often the right call even if actual is slightly bigger today.
Related tools and guides
- Full home office deduction guide
- All freelancer deductions in one checklist
- QBI 20% deduction calculator
- Standard mileage vs actual vehicle expenses
- Schedule C basics for freelancers
Estimates only — not tax, legal, or financial advice. Sources: IRC §280A, IRS Publication 587 (Business Use of Your Home), IRS Rev. Proc. 2013-13 (simplified method), Form 8829 instructions. The home office deduction is among the most-audited deductions on Schedule C — keep documentation. For decisions affecting your finances, consult a licensed CPA or enrolled agent.