About This Calculator

The Home Office Deduction Calculator is a free, no-sign-up tool built for self-employed individuals, freelancers, sole proprietors, and small business owners who want to quickly compare their two IRS deduction options before filing.

What It Does

Calculates the Simplified Method — $5 per square foot, up to 300 sq ft (max $1,500/year)
Calculates the Actual Expense Method — applies your business-use percentage to total eligible home costs
Declares a clear winner — shows which method produces the larger deduction and by how much
Provides a records checklist — tailored to whichever method you're using
100% client-side — all calculations happen in your browser; no data is sent anywhere

Who It's For

This tool is designed for self-employed individuals and business owners who file Schedule C or operate a qualifying business entity. W-2 employees generally cannot claim the home office deduction under current law (post-2017 Tax Cuts and Jobs Act).

Important Disclaimer

This calculator provides educational estimates only. It is not affiliated with the IRS and does not constitute tax advice. IRS rules, eligible expenses, and deduction limits may change from year to year. Always verify your situation with IRS Publication 587 or a qualified tax professional before filing your return.

Built by Officina Systems

This calculator is part of the Officina Systems micro-tool family — a growing collection of free, fast, mobile-first tools built to help people make better financial and business decisions. No accounts, no subscriptions, no clutter.

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Questions? Contact us here or email hello@officinasystems.com.