Home Office Calculator

Last updated: October 17, 2026Written by Shane Atkins, founder of TaxSaver Pro

Compare the simplified and regular home office deduction methods side by side. Enter your space and expenses, and the calculator shows which method gives the larger deduction. The rate and square-footage cap are editable, with a link to the current IRS figures.

Home Office Deduction Calculator

Enter your home office and home expenses to compare the simplified and regular methods side by side.

Your space

Office sq ft

Total home sq ft

Annual home expenses (regular method)

Rent / mortgage interest

Utilities

Insurance

Other (repairs, HOA)

Depreciation (optional)

Simplified method rate

Rate per sq ft

Max sq ft allowed

Verify the current rate and cap on IRS.gov

Your business-use percentage

10%

Simplified method

150 sq ft × $5/sq ft

$750

Regular method

$24,300 × 10%

$2,430

Larger deduction

Regular method — $2,430

Educational estimate only, not tax advice. The regular method here excludes some adjustments (like indirect expense limits and depreciation recapture) that a tax professional would apply. See IRS Publication 587 for the full rules.

Educational guidance only, not tax advice. Talk to a tax professional about your situation. See our Home Office Deduction guide for the full rules behind these numbers.