Home Office Deduction Calculator
Self-employed individuals can deduct home office expenses under IRC Section 280A if the space is used regularly and exclusively for business. Two methods exist: the simplified method allows dollar 5 per square foot (up to 300 square feet for a maximum dollar 1,500 deduction) and requires no depreciation tracking; the actual expense method calculates the business-use percentage of the home and applies it to real costs including rent or mortgage interest, utilities, insurance, repairs, and depreciation. The actual method can yield a larger deduction but triggers depreciation recapture at a 25% rate when the home sells, even with the Section 121 primary residence exclusion. The calculator compares both methods side by side, applies the income limitation (the deduction cannot exceed net business income), and shows estimated tax savings. Employees cannot claim this deduction under current law (2018-2025).
A 200 sq ft office in a 1,800 sq ft home qualifies for a simplified deduction of -- or an actual expense deduction of -- (before income limitation). The better method saves an estimated --.
Simplified method
No depreciation recapture on home sale.
Actual expense method
Depreciation recapture applies at sale.
Two methods for calculating the home office deduction
IRS Publication 587 describes two methods for calculating the home office deduction under IRC Section 280A. You may switch methods from year to year; however, if you used the simplified method in a prior year you cannot carry forward a deduction from that year.
Simplified method (IRS Rev Proc 2013-13)
Introduced in 2013, the simplified method eliminates the need for depreciation calculations and avoids depreciation recapture at sale. The deduction is $5 per square foot of qualified home office space, capped at 300 square feet (maximum deduction $1,500). The deduction is claimed directly on Schedule C, Line 30 using the simplified method worksheet in the Schedule C instructions.
Simplified deduction = min(office sqft, 300) x $5
Maximum = $1,500
Actual expense method (Form 8829)
The actual expense method can yield a larger deduction, particularly for high-cost areas or expensive homes. You calculate the business-use percentage (office sqft divided by total home sqft), then apply that percentage to your actual home expenses including rent or mortgage interest, utilities, insurance, and repairs. You also claim depreciation on the home office portion of your home.
Business use % = office sqft / total sqft
Annual expenses = (rent + utilities + insurance + repairs) x 12
Allocated expenses = annual expenses x business use %
Depreciable basis = home value x 80% (excludes land)
Annual depreciation = depreciable basis / 39 years
Allocated depreciation = annual depreciation x business use %
Total deduction = min(allocated expenses + allocated depreciation, net business income)
The income limitation means the actual method deduction cannot exceed your net business income from the activity. Any disallowed amount carries forward under IRC Section 280A(c)(5).
Eligibility requirements
To claim the home office deduction, all of the following must be true:
- Regular and exclusive use: the space is used only for business on a regular basis. Occasional use or dual-use (personal and business) does not qualify.
- Principal place of business: the home office must be your main place of business, or a place where you regularly meet clients or customers, or a separate structure used in connection with your business.
- Self-employed status: for tax years 2018 to 2025, employees may not claim the home office deduction on federal returns due to the Tax Cuts and Jobs Act suspension of miscellaneous itemised deductions.
Depreciation recapture warning (actual method)
If you use the actual expense method and claim depreciation, that depreciation is subject to recapture when you sell your home. Even if you qualify for the Section 121 primary-residence exclusion (up to $250,000 or $500,000 gain excluded), unrecaptured Section 1250 gain from home office depreciation is taxed at up to 25%. The depreciation recapture amount equals the cumulative depreciation you claimed over the years. This is reported on Schedule D and Form 4797. The simplified method avoids this entirely.
Home office deduction: frequently asked questions
What does 'regular and exclusive use' mean for the home office deduction?
Under IRC Section 280A, your home office must be used regularly (on a recurring basis, not occasionally) and exclusively (only for business, not also as a guest bedroom or personal space) for a qualifying business purpose. A dedicated desk in a shared living room does not qualify. A room used solely as a workspace does. The IRS has strict standards here; a mixed-use space cannot be prorated under either method.
What is the difference between the simplified and actual expense methods?
The simplified method (IRS Rev Proc 2013-13) allows a flat $5 per square foot deduction up to 300 square feet, for a maximum of $1,500. It is simple, requires no depreciation records, and avoids depreciation recapture when you sell your home. The actual expense method calculates the business-use percentage of your home and applies it to actual costs including rent or mortgage interest, utilities, insurance, repairs, and depreciation. It can produce a larger deduction but requires more record-keeping and triggers depreciation recapture at sale.
Can I claim the home office deduction if I am an employee?
For tax years 2018 through 2025, the Tax Cuts and Jobs Act eliminated the home office deduction for employees who receive a W-2, even if the employer requires remote work. Only self-employed individuals (sole proprietors and partners) may deduct home office expenses. Some states may allow the deduction for employees; check your state tax authority.
What is depreciation recapture and how does it affect the actual expense method?
When you use the actual expense method, you claim a depreciation deduction each year based on the business-use percentage of your home's depreciable basis (usually 80% of home value, excluding land). When you later sell the home, the IRS requires you to recapture this depreciation at a 25% tax rate, even if you qualify for the Section 121 primary-residence exclusion. Unrecaptured depreciation is reported on Schedule D. This is a key reason some taxpayers prefer the simplified method.
Can the home office deduction create a tax loss?
No. Under IRC Section 280A, the home office deduction cannot exceed your net income from the business using the home office. Any amount disallowed due to the income limitation is carried forward indefinitely to future years when business income is sufficient. The simplified method does not generate a carryforward; you simply lose any deduction above your net income.
What is Form 8829 and when do I need it?
Form 8829 (Expenses for Business Use of Your Home) is used to calculate the actual expense method home office deduction. You complete it and carry the result to Schedule C, Line 30. It tracks your allowable expenses, the business-use percentage, the income limitation, and any depreciation carryforward. The simplified method does not require Form 8829; you claim the deduction directly on Schedule C using the square-footage worksheet in the instructions.
Official sources
- Home office rules and both methods: IRS Publication 587, Business Use of Your Home.
- Simplified method details: IRS Rev Proc 2013-13.
- Actual expense method form: IRS Form 8829, Expenses for Business Use of Your Home.
Reviewed by the CalculatorHub team, edited by James Graham, 13 June 2026. See our methodology. General information only, not tax advice. Consult a qualified tax professional for your specific situation.