Home Office Deduction Calculator
Calculate your IRS home office deduction as a self-employed person. Compare simplified vs regular method, see your tax savings, and understand the depreciation recapture risk.
Enter your actual home expense categories for the most accurate regular method comparison.
The regular method deducts the office percentage of each home expense category. Use the inputs from the Advanced section above — results are shown here proportionally.
| Expense Category | Total Annual | Office % (10.0%) | Deductible Amount |
|---|---|---|---|
| Mortgage Interest | $12,000 | 10.0% | $1,200 |
| Property Taxes | $4,800 | 10.0% | $480 |
| Home Insurance | $1,800 | 10.0% | $180 |
| Utilities | $3,600 | 10.0% | $360 |
| Repairs & Maintenance | $2,000 | 10.0% | $200 |
| Home Depreciation | $6,000 | 10.0% | $600 |
| Total | $30,200 | $3,020 |
How to Use This Home Office Deduction Calculator
This calculator is for self-employed individuals, freelancers, and business owners who work from home. W-2 employees cannot claim the federal home office deduction after the Tax Cuts and Jobs Act of 2017 suspended that benefit through 2025.
- Home Square Footage: The total finished livable area of your home. Use the same figure that appears on your property listing or tax assessment.
- Office Square Footage: The dedicated workspace area. It must be used regularly and exclusively for business — not shared with personal activities.
- Calculation Method: Let the calculator pick the best method, or choose manually. Simplified ($5/sq ft) is simpler and avoids depreciation recapture. Regular (proportional) is usually larger for high-expense homes.
- Total Annual Home Expenses: All home costs for the regular method: mortgage interest, property taxes, insurance, utilities, repairs, HOA, and depreciation.
Simplified vs. Regular Method
Regular: Office % = Office Sq Ft / Total Home Sq Ft
Deduction = Office % × Total Home Expenses
The simplified method was introduced by the IRS in 2013 to reduce paperwork. It caps the deduction at $1,500 (300 sq ft × $5) and does not allow a carry-forward of unused deductions. The regular method requires tracking all home expenses but typically produces a much larger deduction — and crucially, it allows you to deduct the office's share of home depreciation.
The break-even point depends on your office percentage. For a 10% office-to-home ratio, the regular method wins when your total home expenses exceed $15,000/year. For high-cost markets (California, New York), total expenses easily clear $40,000+, making the regular method far superior on the federal level.
Example: Home Office Deduction Comparison
180 sq ft office in a 1,800 sq ft home — 10%
| Mortgage Interest | $12,000 |
| Property Taxes | $4,800 |
| Insurance | $1,800 |
| Utilities | $3,600 |
| Repairs | $2,000 |
| Total Home Expenses | $24,200 |
| Regular Method Deduction (10%) | $2,420 |
| Simplified Method Deduction | $900 |
| Additional Deduction (Regular) | $1,520 more |
| Extra Tax Savings at 22% | $334/year |
The regular method wins by $334/year in this example — but requires careful recordkeeping and creates depreciation recapture risk at sale.