You can generally deduct qualifying home office costs if you are self-employed and use a specific part of your home exclusively and regularly for business. Eligible costs can include a business share of rent, mortgage interest, utilities, insurance, repairs, and depreciation—or a simplified deduction of $5 per square foot, up to $1,500. You cannot deduct your entire housing bill just because you work from home.
Who qualifies for the home office deduction?
The deduction generally applies to sole proprietors, qualifying independent contractors, and other self-employed taxpayers. Both renters and homeowners can qualify. A home can include a house, apartment, condominium, mobile home, or similar property that provides living accommodations.
Your workspace usually must satisfy two tests:
- Exclusive use: You use an identifiable area only for your trade or business. A guest bedroom that doubles as your office generally fails this test.
- Regular use: You use the area consistently for business, not just occasionally.
A separate room is not required. A clearly identifiable section of a room can qualify without a permanent partition, provided it is not also used personally.
The space must serve a qualifying business purpose
Your home office generally must be your principal place of business, a place where you regularly meet clients or customers in the normal course of business, or a separate structure used for business.
A home office can qualify as your principal place of business when you use it exclusively and regularly for administrative or management activities and have no other fixed location where you conduct substantial administrative or management activities. A contractor who performs jobs elsewhere but handles scheduling, billing, and bookkeeping from a qualifying home office may meet this rule.
Special exceptions to exclusive use can apply to qualifying daycare operations and certain inventory or product-sample storage. Inventory storage generally requires a wholesale or retail selling business and a home that is its only fixed location. These exceptions have additional requirements.
Employees and corporation owners need a different analysis
W-2 employees generally cannot claim a federal home office deduction for unreimbursed employee expenses. Working remotely does not change that result. State rules can differ.
If your business operates as an S corporation or C corporation, do not simply put corporate office costs on Schedule C. Properly documented reimbursements through an accountable plan may be appropriate. Partners also face separate rules, including whether their partnership agreement requires them to pay expenses personally.
Simplified method vs. actual expenses
You generally choose a method each tax year. The simplified method reduces paperwork, but the actual-expense method may produce a larger deduction. Neither method excuses you from proving that the space qualifies.
| Feature | Simplified method | Actual-expense method |
|---|---|---|
| Calculation | $5 × qualifying square feet | Eligible direct costs plus allocated indirect costs |
| Size limit | Maximum 300 square feet | No comparable square-foot cap |
| Maximum before income limits | $1,500 for a full qualifying year | Depends on expenses and business use |
| Home depreciation | Not deducted | Generally included for an owned home |
| Expense records | No actual housing-cost calculation required | Bills, allocation records, and depreciation support required |
| Schedule C reporting | Schedule C instructions worksheet | Form 8829, generally |
For part-year use or changes in office size, simplified-method calculations use special monthly rules rather than automatically allowing the full $1,500. Rules change, so confirm rates, limits, and form instructions for the current tax year before filing.
What can you write off under the actual-expense method?
Start by separating direct expenses, indirect expenses, and personal expenses. Direct expenses benefit only the office. Indirect expenses maintain the entire home. Personal expenses do not qualify.
Direct office expenses
Painting or repairing only a qualifying office is generally a direct expense, potentially deductible in full subject to applicable limits. A capital improvement is different: installing a permanent improvement may require capitalization and depreciation rather than an immediate deduction.
Shared household expenses
The business-use share of these costs may qualify:
- Rent for a rented home.
- Mortgage interest and real estate taxes, subject to applicable rules.
- Electricity, heating, water, and other qualifying utilities.
- Homeowners or renters insurance.
- General home repairs and maintenance.
- Depreciation of the building portion of an owned home.
Mortgage principal is not deductible. Land cannot be depreciated. Improvements are not automatically repairs, and work benefiting only a personal area—such as repainting a child's bedroom—is not an office expense.
For homeowners, the depreciation basis generally starts with the lower of adjusted basis or fair market value when business use begins, excluding land. Residential space used as a business office is generally depreciated as nonresidential real property over 39 years, with applicable conventions.
Business equipment is a separate deduction category
A desk, computer, printer, software subscription, or business supplies may be deductible separately from the home office calculation. Business-use allocation, capitalization, and depreciation rules still apply. Choosing the simplified method does not eliminate otherwise allowable business equipment deductions.
Internet and phone costs require their own business-use analysis. The basic cost of the first landline into a home is generally personal, although qualifying business calls or a separate business line may be deductible. Avoid counting the same expense twice. Our guide to tax deductions small business owners often miss covers other categories worth reviewing.
A worked example: Which method saves more?
Assume you are a Schedule C consultant renting a 2,000-square-foot home. You use a 200-square-foot office exclusively and regularly throughout the year, and your business income is sufficient to support the deduction.
- Calculate business use: 200 ÷ 2,000 = 10%.
- Add eligible shared costs: $24,000 rent + $3,600 utilities + $400 renters insurance = $28,000.
- Allocate shared expenses: $28,000 × 10% = $2,800.
- Add direct costs: $300 to paint only the office produces a $3,100 actual-expense deduction.
The simplified deduction would be 200 × $5 = $1,000. Here, actual expenses produce a deduction $2,100 larger. At an assumed 24% marginal federal income tax rate, that difference represents approximately $504 in income tax savings before self-employment tax, qualified business income deduction interactions, and other effects.
A deduction reduces taxable income; it is not a dollar-for-dollar tax credit. Compare the full tax result and compliance cost, not just the largest number on a worksheet.
Income limits and unused deductions
Home office deductions are subject to business-income limitations. Under the actual method, operating expenses and depreciation generally cannot create or increase a business loss; certain otherwise deductible items receive different treatment. Disallowed actual-method expenses may carry forward, subject to future limitations.
The simplified deduction also has an income limit, but an unused simplified deduction does not carry forward. Prior actual-method carryovers cannot be deducted in a simplified-method year, although they may remain available for a later actual-method year. Track carryovers rather than assuming they disappear when you switch methods.
How to document and report the deduction
We recommend maintaining a home office file that includes:
- A floor plan, measurements, and your square-footage calculation.
- Dated photos supporting the workspace's business-only use.
- Records showing when business use began, ended, or changed.
- A description of business activities performed there.
- Rent statements, utility bills, insurance records, and repair invoices for actual expenses.
- Purchase, improvement, land-allocation, and depreciation records for an owned home.
Schedule C filers generally use Form 8829 for actual expenses and report the resulting deduction on Schedule C, line 30. For the simplified method, use the worksheet in the Schedule C instructions rather than Form 8829. Keep records supporting ordinary deductions generally for at least three years after filing; property basis and depreciation records often need to be retained much longer.
Where this goes wrong
The most common problems are factual, not mathematical. A dining table used for family meals fails exclusive use even if you work there daily. An inflated square-footage estimate can undermine an otherwise valid deduction. Deducting household expenses without proving a qualifying business workspace is another avoidable error.
Homeowners should also consider the eventual sale. Depreciation allowed or allowable after May 6, 1997, generally cannot be excluded under the home-sale exclusion and may be taxed as unrecaptured Section 1250 gain, at a federal rate up to 25%. Simplified-method years do not generate home depreciation, but they do not erase depreciation from earlier years.
Our approach is to connect this deduction with your entity structure, reimbursements, and overall tax strategy. For broader planning, read how to reduce small business taxes legally and our Small Business Tax Reduction: The Complete Guide.
SWITCH is a US tax advisory firm, not a law firm, with a CPA and a tax attorney on every file. To review your next steps, Request A Free Consult. Initial consultations and quotes are free; assessments are paid.