Depreciation of home office is the annual tax deduction a taxpayer claims for the gradual decline in value of a portion of their residence used exclusively for business. This applies only to the business-use portion of the home and is calculated using IRS Form 4562.
The Internal Revenue Service permits depreciation of home office space when the space is used regularly and exclusively for business purposes. This includes rooms used for work, such as a dedicated study or converted bedroom. Depreciation is not available for homes used primarily for personal reasons or for temporary setups.
For example, if a homeowner uses 20% of a 2,000-square-foot house for business, they may depreciate 20% of the home's basis (original cost plus improvements) over 27.5 years for residential property under MACRS (Modified Accelerated Cost Recovery System).
Depreciation is based on the business-use percentage of the home and the asset's recovery period. Residential real estate is assigned a 27.5-year recovery period under MACRS. The taxpayer must have owned the home and used it for business during the tax year.
To calculate depreciation, divide the home's adjusted basis by the recovery period. Multiply the result by the business-use percentage. For example, a home with a $300,000 adjusted basis used 25% for business would yield $27,273 in annual depreciation ($300,000 ÷ 27.5 = $10,909; × 25% = $2,727).
Depreciation is claimed on Form 4562, Part III, and reported on Schedule C (for sole proprietors) or Form 1040. It reduces taxable income but does not affect net profit directly. The deduction is subject to passive activity loss rules if the home office is part of a rental or investment activity.
Only homes used for business purposes qualify. The space must be used regularly and exclusively for business. A kitchen table in the dining room used intermittently for Zoom calls doesn't meet the standard. The IRS defines "exclusive" as no personal use during business hours.
Documentation required includes a floor plan showing the business area, photos of the workspace, and records of home expenses. The IRS requires proof of ownership and business use. Without proper records, the deduction may be disallowed during an audit.
For example, a freelance graphic designer who uses a 120-square-foot room in a 1,600-square-foot home for client work can claim depreciation. They must show that the room is used solely for business, not for storage or entertainment.
IRS rules assign specific recovery periods based on asset class. For residential real property, the recovery period is 27.5 years. The most common method is straight-line depreciation, which spreads the cost evenly over the recovery period.
| Asset Type | Recovery Period | Depreciation Method |
|---|---|---|
| Residential real property | 27.5 years | Straight-line |
| Furniture and equipment | 7 years | MACRS (200% declining balance) |
| Computer systems | 5 years | MACRS (200% declining balance) |
Equipment like desks, chairs, and computers used in the home office are depreciated separately under different rules. These assets fall under the 7-year and 5-year classes and use accelerated methods. The business-use percentage applies to each category.
For instance, a $2,000 computer used 30% for business would be depreciated over five years using the 200% declining balance method. The first-year deduction would be $800 ($2,000 × 20% × 200%), reduced by the business-use share.
Many taxpayers assume depreciation applies to the entire home. It applies only to the business-use portion. A common mistake is claiming depreciation on a home used for both business and personal purposes without calculating the correct percentage.
Another error is treating depreciation as a cash expense. It is a non-cash accounting entry. The deduction reduces taxable income but does not require out-of-pocket spending. This differs from actual expenses like utilities or internet, which are deductible separately.
Some believe they can claim depreciation even if they rent the home. Rental properties can claim depreciation, but only if the property is used for business and meets IRS criteria. Renters cannot claim depreciation on the home itself, though they may deduct a portion of rent as a business expense.
Depreciation is not permitted if the home office is used for a hobby rather than a trade or business. The IRS distinguishes between active business activities and personal pursuits. A hobbyist cannot claim depreciation, even if they use a room for creative work.
If the home was acquired through inheritance or gift, the basis is stepped up to fair market value at the time of transfer. This affects the amount eligible for depreciation. For example, a home inherited with a $400,000 fair market value and used 20% for business would allow $2,909 in annual depreciation ($400,000 ÷ 27.5 × 20%).
Depreciation is also limited by passive activity loss rules. If the home office is part of a passive activity (e.g., rental property), losses may be deferred until the property is sold or income exceeds losses.
Consider a self-employed consultant who owns a 2,500-square-foot home purchased for $450,000. The home has a $50,000 addition for a dedicated office space. The total adjusted basis is $500,000. The office occupies 300 square feet, or 12% of the home.
Using the 27.5-year recovery period, the annual depreciation is $18,182 ($500,000 ÷ 27.5). The business-use portion is 12%, so the deductible amount is $2,182 ($18,182 × 12%). This amount is reported on Form 4562 and Schedule C.
If the office contains $3,000 in furniture and equipment, those assets are depreciated separately. Using the 7-year MACRS method, the first-year deduction is $857 ($3,000 × 14.29% × 12%). The total home office depreciation deduction is $3,039.
Depreciation of home office is a legitimate tax deduction for qualified business use. It must be calculated based on the business-use percentage and the home's adjusted basis. Proper documentation and recordkeeping are essential to support the claim.
Always consult a tax professional before claiming depreciation. The IRS provides detailed guidance in Publication 587, which outlines eligibility, calculation methods, and reporting requirements.