Quick Answer
The home office deduction lets self-employed individuals and small business owners deduct expenses for the business use of their home. You can choose between the simplified method ($5 per square foot, up to 300 sq ft, for a maximum $1,500 deduction) or the regular method (actual expenses proportional to business-use percentage). To qualify, the space must be used regularly and exclusively for business and serve as your principal place of business.
Who Qualifies for the Home Office Deduction?
The IRS allows the home office deduction under IRC Section 280A for taxpayers who meet two key tests:
- Regular and exclusive use — The designated area of your home must be used consistently for business and must not serve any personal purpose. A spare bedroom converted into a dedicated office qualifies; a kitchen table used for paperwork does not.
- Principal place of business — The home office must be your primary business location, or a place where you regularly meet patients, clients, or customers. If you perform administrative or management activities at home and have no other fixed location for those tasks, the home office qualifies as your principal place of business.
Both employees and self-employed taxpayers can theoretically claim the deduction, but employees who receive a W-2 cannot deduct unreimbursed home office expenses under current law (TCJA suspended miscellaneous itemized deductions through 2025). The deduction is most valuable for self-employed individuals and sole proprietors who file Schedule C.
The Simplified Method
The simplified method, introduced in 2013, makes claiming the deduction easy. You multiply the square footage of your qualified home office by $5, capped at 300 square feet:
| Item | Detail |
|---|---|
| Rate per square foot | $5 |
| Maximum square footage | 300 sq ft |
| Maximum deduction | $1,500 |
| Form | Schedule C, line 30 |
The simplified method requires no expense tracking or depreciation calculations. You simply measure the office area and claim the deduction. However, you cannot deduct actual home expenses (mortgage interest, insurance, utilities) separately for the business percentage — those are built into the $5 rate.
The Regular Method
The regular method takes more record-keeping but often yields a larger deduction, especially for homeowners in high-cost areas. Under this method, you:
- Tally all allowable home expenses for the year.
- Calculate the business-use percentage = (office square footage ÷ total home square footage).
- Apply that percentage to each expense category.
- Depreciate the home office portion of the building over 39 years (residential property).
Example: Your home is 2,000 sq ft, and your office is 200 sq ft (10% business use). Annual home expenses: mortgage interest $12,000, real estate taxes $4,000, insurance $1,800, utilities $3,600, repairs $600.
| Expense | Total Annual | Business Portion (10%) |
|---|---|---|
| Mortgage interest | $12,000 | $1,200 |
| Real estate taxes | $4,000 | $400 |
| Homeowner's insurance | $1,800 | $180 |
| Utilities | $3,600 | $360 |
| Repairs & maintenance | $600 | $60 |
| Subtotal | $22,000 | $2,200 |
Add depreciation: if the home's adjusted basis (excluding land) is $250,000, the annual depreciation on the 10% portion is $250,000 × 10% ÷ 39 = $641. Total deduction under the regular method: $2,200 + $641 = $2,841 — significantly more than the $1,500 simplified cap.
Direct vs. Indirect Expenses
The regular method distinguishes between two types of expenses:
- Direct expenses — Costs that apply only to the home office (e.g., painting the office, office-only window treatments). These are deducted in full, not pro-rated.
- Indirect expenses — Costs that benefit the entire home (mortgage interest, property tax, insurance, utilities). These are pro-rated by the business-use percentage.
Understanding this distinction is critical. A $500 paint job for the office is a $500 deduction. A $500 whole-house paint job at 10% business use yields only a $50 deduction.
Deductible Expenses Checklist
The following expenses are deductible under the regular method:
- Mortgage interest (portion allocable to home office)
- Real estate taxes
- Rent (if you rent your home — the business percentage of monthly rent)
- Homeowner's or renter's insurance
- Utilities (electricity, gas, water, internet)
- Repairs and maintenance (general home repairs are indirect; office-only repairs are direct)
- Security system costs
- Depreciation (homeowners only — based on the adjusted basis of the building, not land)
- Casualty losses affecting the home office
Expenses that are not deductible include commuting costs, food, and general household supplies unrelated to the office. For more on what qualifies as a deductible business expense, see our tax deductions guide for small business.
How to Claim the Deduction
Self-Employed (Schedule C)
File Form 8829 (Expenses for Business Use of Your Home) with your tax return. Form 8829 walks you through the regular method calculation. If you choose the simplified method, enter the square footage and deduction on Schedule C, line 30 — no Form 8829 needed.
Partners and S Corporation Shareholders
Partners and shareholders who work from home can claim the deduction on Schedule E as an unreimbursed partnership expense. The same regular/simplified choice applies. S corporation owners cannot deduct home office expenses on the corporate return — the deduction belongs on the individual return.
Depreciation Recapture
If you use the regular method and claim depreciation on your home office, you will face depreciation recapture when you sell the home. The IRS requires you to pay tax on the cumulative depreciation claimed (at a maximum 25% rate), even if you otherwise qualify for the home-sale capital gains exclusion. This is a common surprise for taxpayers who used the regular method for many years and then sell. The simplified method does not require depreciation recapture because no depreciation is claimed.
Simplified vs. Regular: Which to Choose?
Consider these factors when deciding which method to use:
- High-cost housing areas — The regular method usually wins because mortgage interest and property taxes are large, making the business-use percentage yield a bigger deduction.
- Renters with modest expenses — The simplified method may be close enough that the convenience outweighs the extra paperwork.
- Future home sale plans — If you plan to sell soon, the simplified method avoids depreciation recapture.
- Record-keeping tolerance — The regular method requires keeping utility bills, insurance statements, and tax records. The simplified method needs only a square-footage measurement.
You can switch between methods year to year, but if you switch from the regular method to the simplified method, you must use the simplified method for the year of the switch and cannot claim depreciation for that year.
Common Mistakes
- Claiming a non-exclusive space — Using the office for personal activities (gaming, guest room) disqualifies the deduction under audit.
- Forgetting to carry forward unused deductions — The home office deduction cannot create or increase a net operating loss. Excess deductions carry forward to the next year.
- Ignoring estimated tax payments — A large home office deduction reduces taxable income, which may reduce your estimated tax payments. Adjust quarterly payments accordingly to avoid underpayment penalties.
- Mixing employee and self-employed rules — W-2 employees face different rules than self-employed filers. Confirm your filing status before claiming.
Related Reading
Learn more about small business tax deductions, tax credits for small business, and sales tax compliance on AccountingTitan. If you are a freelancer or independent contractor, also check our self-employment tax guide for the full picture of your tax obligations.
