Home Office Deduction Calculator

Compare the simplified method ($5/sq ft) vs. regular method for your home office tax deduction. Find which gives you a larger deduction.

Home Office Details

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Enter your home office details and click Calculate to compare deduction methods.

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Pro Tip

If your actual expenses are high (mortgage interest, property taxes, utilities), the regular method almost always beats the simplified method. The simplified method is best for renters with low expenses and small offices.

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Understanding the Home Office Deduction

The home office deduction allows self-employed individuals and certain employees to deduct expenses for the business use of their home. The space must be used regularly and exclusively for business purposes.

The simplified method allows a deduction of $5 per square foot of home office space, up to a maximum of 300 square feet ($1,500 maximum deduction). This method requires no tracking of actual expenses and no depreciation calculations.

The regular method calculates the actual expenses attributable to the home office. You determine the percentage of your home used for business (office square footage divided by total home square footage) and apply that percentage to deductible expenses: mortgage interest or rent, utilities, insurance, repairs, and depreciation.

Important: Since the Tax Cuts and Jobs Act of 2018, W-2 employees can no longer claim the home office deduction. Only self-employed individuals (Schedule C filers), statutory employees, and certain Armed Forces reservists qualify.

Home Office Deduction Formulas

Simplified = Office Sq Ft × $5 (max 300 sq ft)
Regular = Total Expenses × (Office Sq Ft / Home Sq Ft)

Where:

Simplified Max = $1,500 (300 sq ft x $5)

Office % = Office square footage / total home square footage

Expenses = Rent/mortgage, utilities, insurance, repairs, depreciation

Example

200 sq ft office in a 2,000 sq ft home with $26,300 total expenses:

  • • Simplified: 200 sq ft x $5 = $1,000
  • • Regular: Office % = 200/2,000 = 10%
  • • Regular deduction = $26,300 x 10% = $2,630
  • • Regular method is better by $1,630

Frequently Asked Questions

Who qualifies for the home office deduction?
Self-employed individuals, independent contractors, and sole proprietors who use a dedicated space in their home regularly and exclusively for business. Since 2018, W-2 employees cannot claim this deduction on their federal return (some states still allow it).
What does 'regular and exclusive use' mean?
The space must be used regularly (not occasionally) and exclusively for business. A desk in your bedroom that you also use for personal activities does not qualify. However, a separate room used only as an office does qualify, even if it has a couch.
Can I switch between simplified and regular methods?
Yes. You can choose whichever method benefits you more each year. However, if you switch from the regular method, you may need to recapture depreciation. The simplified method does not require depreciation calculations.
What expenses can I deduct with the regular method?
Mortgage interest or rent, real estate taxes, utilities (electric, gas, water, internet), homeowner's insurance, repairs and maintenance, and home depreciation. Direct expenses (only for the office, like painting the office) are 100% deductible. Indirect expenses are prorated.
Is there a limit to the home office deduction?
Yes. The deduction cannot exceed your net business income. In other words, the home office deduction cannot create or increase a business loss. Unused deductions can be carried forward to future years with the regular method.