Home Office Deduction Calculator Formula
Understand the math behind the home office deduction calculator. Each variable explained with a worked example.
Formulas Used
Home Office Deduction
deduction = min(office_sqft, 300) * 5Tax Savings
tax_savings = min(office_sqft, 300) * 5 * marginal_rate / 100Variables
| Variable | Description | Default |
|---|---|---|
office_sqft | Office Square Footage(sq ft) | 200 |
marginal_rate | Marginal Tax Rate(%) | 22 |
How It Works
Simplified Home Office Deduction
Deduction = Office Square Feet x $5 (max 300 sq ft = $1,500)
The simplified method requires no actual expense tracking. The regular method may yield a larger deduction if your expenses are high.
Note: Only available for self-employed individuals. W-2 employees cannot claim the home office deduction.
Worked Example
200 sq ft office, 22% tax rate.
- 01Deduction = 200 x $5 = $1,000
- 02Tax savings = $1,000 x 22% = $220
Frequently Asked Questions
Who qualifies for the home office deduction?
Self-employed individuals who use a dedicated space regularly and exclusively for business. W-2 employees cannot claim this deduction since 2018.
Simplified vs regular method?
Simplified: $5/sq ft up to 300 sq ft ($1,500 max). Regular: actual expenses prorated by office percentage of home. Calculate both and use the larger one.
Does "exclusive use" mean anything?
Yes. The space must be used regularly and exclusively for business. A dining table used for both meals and work does not qualify.
Ready to run the numbers?
Open Home Office Deduction Calculator