Free 2026 Home Office Deduction Calculator

1. Enter the square footage used regularly and exclusively for business.
2. Enter annual home expenses and business-use percentage if comparing the actual method.
3. Review the larger planning estimate and source notes.

The simplified method uses the IRS-prescribed dollar amount per square foot up to the square-foot cap. The actual-method estimate multiplies entered home expenses by the business-use percentage.

A 200-square-foot home office under the simplified method uses 200 x $5, subject to the IRS cap.

Year scope: Use the year selector or year note on the calculator itself when comparing thresholds, rates, deductions, or credit limits.

This calculator is maintained against official IRS, SSA, and other primary-source guidance where applicable. Review the sources page and editorial methodology page to verify update practices.

Estimate the simplified home office deduction and compare it with a basic actual-expense allocation for self-employed taxpayers.

Estimate only. Home office eligibility requires regular and exclusive business use and may be limited by business income.