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Home Office Deduction Calculator
Calculate your home office tax deduction using the actual expense or simplified method. See the deduction amount, tax savings, and business use percentage.
Home office deduction
$3,067
Estimated tax savings
$859
Business use percentage
11.1
%
Simplified method amount ($5/sq ft)
$1,000
How the math works
The home office deduction requires exclusive and regular business use. Actual method tracks real expenses prorated by square footage. Simplified method is $5 per sq ft (max 300 sq ft = $1,500 max).
Renters and homeowners both qualify. Homeowners using actual method may face partial depreciation recapture on sale. The deduction cannot exceed your net SE income.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Home Office Deduction Calculator is built to give a quick, browser-based estimate for home office deduction. Calculate your home office tax deduction using the actual expense or simplified method. See the deduction amount, tax savings, and business use percentage. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the home office deduction result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this home office deduction estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter your home office and total home square footage.
- Enter annual rent (or mortgage interest + property taxes) and utilities.
- Choose actual expense or simplified method.
- See the deduction amount and estimated tax savings.
Frequently Asked Questions
What is the home office deduction?
A tax deduction for self-employed individuals who use part of their home exclusively and regularly for business. You can deduct a proportionate share of home expenses.
Actual method vs. simplified method?
Actual method prorates real home expenses by business-use percentage — potentially larger but requires records. Simplified method is $5 per sq ft (max 300 sq ft = $1,500) and is simpler to claim.
Can renters claim the home office deduction?
Yes — renters can deduct the business portion of rent and utilities. The deduction calculation works the same way.
Does it matter if I'm an employee?
W2 employees cannot claim the home office deduction (the TCJA eliminated it through 2025). Only self-employed individuals and business owners qualify.
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