Planning calculator · Assumptions reviewed July 12, 2026
Home-Office Deduction Calculator
Compare simplified and actual-method home-office estimates. Eligibility generally requires regular and exclusive business use; entering a room does not establish eligibility.
Estimated result
Calculation breakdown
Amounts are rounded to the nearest dollar for planning. They are not a tax return or payment instruction.
How this estimate works
The simplified estimate multiplies the smaller of office area or your entered limit by the entered rate. The actual estimate adds eligible direct expenses to indirect expenses multiplied by the office-to-home area percentage.
Assumptions
- All rate and limit values are user-entered and require annual verification.
- Direct expenses are treated as fully allocable; indirect expenses are allocated by square footage.
Limitations
Regular and exclusive use, principal-place-of-business rules, income limitations, depreciation, carryovers, daycare rules, and expense classification are not evaluated. A larger estimate is not automatically the permitted choice.
Frequently asked questions
Are these results tax advice?
No. They are simplified educational estimates. Use current official guidance or a qualified professional for decisions.
Are my entries sent anywhere?
No. Calculations run locally in your browser and this site does not submit calculator entries to a server.
Why are results rounded?
Whole-dollar display avoids suggesting precision that a simplified estimate cannot support.
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Records and explanations for this estimate
Use these guides to improve inputs and review important limitations.
Educational guides
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Expense guides
Tax disclaimer
This tool provides a simplified informational estimate, not tax, legal, accounting, or financial advice. Tax rules and individual circumstances vary. Verify current rules with official IRS guidance and consult a qualified tax professional.