Home Office Deduction Calculator

What this calculator estimates

Compare simplified and actual-expense home-office deduction estimates. The calculation runs locally in your browser and is intended for planning and comparison.

How to use it

Enter the requested values, select Calculate, review the headline result and supporting figures, then change one input at a time to compare another scenario.

How the calculation works

The actual method allocates eligible home expenses by office-area percentage. The simplified method uses the entered per-square-foot rate up to the entered cap.

Input checklist

The Home Office Deduction Calculator uses the values shown in its form. Before calculating, check each input independently so an incorrect unit or time period does not carry through to the final result.

• Exclusive office square feet: verify that this value uses the unit, period, and definition shown by the calculator.
• Total home square feet: verify that this value uses the unit, period, and definition shown by the calculator.
• Eligible annual home expenses ($): verify that this value uses the unit, period, and definition shown by the calculator.
• Simplified rate per square foot ($): verify that this value uses the unit, period, and definition shown by the calculator.
• Simplified square-foot cap: verify that this value uses the unit, period, and definition shown by the calculator.

Practical interpretation

Use the Home Office Deduction Calculator result as the answer to the specific inputs entered, not as a universal value. The calculation currently described on this page is: The actual method allocates eligible home expenses by office-area percentage. The simplified method uses the entered per-square-foot rate up to the entered cap. Change one important input at a time when comparing scenarios so you can see which assumption actually drives the difference.

Checks before relying on the result

Tax rules, thresholds, deductions, and filing treatment can vary by year and jurisdiction, so compare the estimate with current official guidance before using it for filing or withholding decisions. Recalculate when a key value changes, and keep the original inputs with the result if you need to reproduce or compare the calculation later.

Important limitations

Eligibility requires regular and exclusive business use and other tax rules.

Frequently asked questions