Form 8829 Home Office Calculator 2026 β Actual Expense Method
Calculate the home office deduction using Form 8829 actual expense method. Pro-rata utilities, depreciation, direct vs indirect expenses, and comparison with the simplified $5/sqft method.
sq ft
sq ft
Business use %: 10.0% $
$
$
Electric, gas, water β business % applied $
$
100% deductible β painting office, replacing office window $
Business % applied β HVAC service, roof repair $
For depreciation calculation $
Land is not depreciable $
Limits deduction β cannot create a loss $0
Actual Method Deduction
$0
Simplified Method ($5/sqft)
β
Better Method for You
0%
Business Use %
$0
Annual Depreciation Deduction
$0
Tax Savings vs Simplified (est. 22%)
Form 8829 Calculation Breakdown
Form 8829 Actual Expense Method Explained
The actual expense method requires calculating what percentage of your home is used for business and applying that percentage to most home expenses. Direct expenses (only benefiting the office) are 100% deductible; indirect expenses are allocated by the business-use percentage.
Formulas
Business Use % = Office Sq Ft Γ· Total Home Sq Ft
Direct Expenses = 100% of office-specific costs
Indirect Expenses Γ Business Use % = deductible portion
Depreciation Basis = (Purchase Price β Land) Γ Business Use %
Annual Depreciation = Depreciable Basis Γ 2.564% (39-year SL)
Total Deduction = Direct + (Indirect Γ %) + Depreciation
Limited to: Net Business Income (cannot create loss)
Simplified: min(Office Sq Ft, 300) Γ $5 = max $1,500
Direct Expenses = 100% of office-specific costs
Indirect Expenses Γ Business Use % = deductible portion
Depreciation Basis = (Purchase Price β Land) Γ Business Use %
Annual Depreciation = Depreciable Basis Γ 2.564% (39-year SL)
Total Deduction = Direct + (Indirect Γ %) + Depreciation
Limited to: Net Business Income (cannot create loss)
Simplified: min(Office Sq Ft, 300) Γ $5 = max $1,500
Example
1,800 sq ft home, 180 sq ft office (10%), $350K purchase, $70K land:
Business use: 10% | Mortgage interest: $14,400 Γ 10% = $1,440
Property tax: $4,800 Γ 10% = $480 | Utilities: $3,600 Γ 10% = $360
Depreciation basis: ($350,000 β $70,000) Γ 10% = $28,000
Annual depreciation: $28,000 Γ 2.564% = $718
Total actual deduction: ~$3,598 vs simplified: $900 (180 Γ $5)
Actual saves $2,698 more β at 22% = $594 more in tax savings
Business use: 10% | Mortgage interest: $14,400 Γ 10% = $1,440
Property tax: $4,800 Γ 10% = $480 | Utilities: $3,600 Γ 10% = $360
Depreciation basis: ($350,000 β $70,000) Γ 10% = $28,000
Annual depreciation: $28,000 Γ 2.564% = $718
Total actual deduction: ~$3,598 vs simplified: $900 (180 Γ $5)
Actual saves $2,698 more β at 22% = $594 more in tax savings
Extended
5-Year Depreciation Impact & Recapture Calculator
See cumulative depreciation deductions over 5 years and your recapture liability when selling
5-Year Cumulative Depreciation & Recapture on Sale
See how home office depreciation accumulates over years and your tax liability when you eventually sell the home.
yrs
%
$
| Year | Annual Depreciation | Tax Savings (deduction) | Cumulative Depreciation | Cumulative Tax Saved |
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Depreciation Recapture Warning: All home office depreciation claimed reduces your Β§121 exclusion basis. On sale, the depreciation amount is taxed as ordinary income at 25% (recapture rate), regardless of your regular bracket. This is the cost of claiming depreciation now β plan accordingly.
Frequently Asked Questions
What is the home office deduction and who qualifies?
Self-employed workers who use part of their home regularly and exclusively for business may deduct home office expenses on Form 8829. "Regular and exclusive" means the space must be used only for business β a desk in your bedroom that you also use personally does not qualify. W-2 employees generally cannot claim the home office deduction since TCJA 2018 suspended miscellaneous itemized deductions through 2025 (possibly extended). Qualifying uses: principal place of business, meeting clients, or a separate structure.
What is the simplified vs actual expense method?
The simplified method deducts $5 per square foot of dedicated office space, up to 300 sq ft, for a maximum of $1,500/year. The actual expense method (Form 8829) allocates a percentage of your real home expenses based on office sq ft Γ· total home sq ft. Actual expenses include mortgage interest, property tax, utilities, insurance, repairs, and depreciation. Actual method typically gives a larger deduction for larger offices or high-cost homes but requires more record-keeping and triggers depreciation recapture when you sell.
How is home office depreciation calculated?
The home office depreciation uses 39-year straight-line method (Form 4562). The annual rate is approximately 2.564% (1/39). You depreciate the business percentage of the home's cost basis excluding land. Example: home purchase price $400,000, land value $50,000, home basis $350,000, business use 10% β depreciable basis $35,000 β annual depreciation $35,000 Γ 2.564% = $897. This deduction reduces your taxes now but creates depreciation recapture when you sell.
What is depreciation recapture when selling my home?
When you sell your home, any home office depreciation you claimed over the years must be "recaptured" as ordinary income taxed at 25%. This applies even if you've stopped using the home office. For example: if you claimed $5,000 in depreciation over 5 years, you owe tax on $5,000 at 25% = $1,250 when you sell, in addition to any capital gains. This reduces the $250,000 (single) / $500,000 (MFJ) Β§121 exclusion on the business-use portion of the home.
Can the home office deduction create a business loss?
No. The home office deduction (actual method) is limited to your net business income before the home office deduction. You cannot use it to create a net loss. Any excess deduction that cannot be used this year due to this limitation can be carried forward to the next tax year. This prevents using home office expenses to generate artificial losses. The simplified method has a similar limitation β it also cannot reduce your business income below zero.