Tell us about your home and office
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Regular & Exclusive Use
You affirm this space is used only for business. If you mix personal use (guest room, TV area), the deduction does not apply — the IRS tests this.
Principal Place of Business
This must be where you conduct administrative or management activities, with no other fixed location used for the same purpose.
Cumulative deduction at current expense levels
Assumes expenses hold constant. Actual amounts will change each year.
| Tax Year | Simplified Method | Actual Method | Winner (Cumulative) |
|---|
What you must be able to produce
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Floor plan or measurement recordSketch, tape measure log, or building plans showing both office and total home square footage. Date and sign it.
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12 months of rent receipts or Form 1098 (mortgage interest)Homeowners: your lender sends Form 1098 each January. Renters: keep all 12 rent receipts or bank statements showing payment.
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Utility bills (12 months)Electric, gas, water, and broadband. Annual summary statements from your provider are acceptable.
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Homeowners or renters insurance declaration pageShows annual premium. Keep the full policy page, not just the payment confirmation.
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Repair and maintenance receiptsEach receipt must show vendor, date, amount, and nature of work. Note whether it benefits the whole home or just the office.
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Business use log or calendarDaily records — a shared Google Calendar, a time-tracking app, or a handwritten log — showing you used the space regularly for business throughout the year.
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IRS Form 8829 (Actual Method only)Filed with Schedule C. Carries forward any unused deduction to the next year. Not required if you use the Simplified Method.
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LLC or business formation documentsArticles of organization, operating agreement, and EIN letter strengthen the case that this is a genuine business with a dedicated workspace.
Gotchas that get home office deductions denied
Mixed personal use kills the deduction entirely
The IRS "exclusive use" test has no pro-rate exception. If your office doubles as a guest bedroom, playroom, or personal craft space — even occasionally — the entire deduction is denied, not reduced. The space must be dedicated to business and nothing else.
You cannot deduct more than your business income
The home office deduction cannot create a net loss from your business. If your business income for the year is less than your calculated deduction, you can only deduct up to your net income. The unused portion carries forward to the next year under the Actual Method (Form 8829, Line 43). The Simplified Method has no carryforward.
S-Corp owners have a different path
If your business is structured as an S-Corp, you as the employee-owner cannot claim a home office on Schedule A (suspended 2018-2025). Instead, the S-Corp should adopt an Accountable Plan and reimburse you for the business-use percentage of home expenses. Reimbursements are deductible by the corporation and tax-free to you.
Simplified Method forfeits depreciation — permanently
If you use the Simplified Method, you cannot claim depreciation for that year. More importantly, you cannot recapture a depreciation deduction you didn't take — so the cost basis of your home is not reduced. If you plan to sell, consider the Actual Method once with a CPA to evaluate the long-term trade-off.
Unlock home office deductions with a properly structured LLC
An LLC creates a clear legal boundary between your personal and business finances — one of the strongest signals of legitimacy in an IRS audit. We handle every filing step, and your name stays off the public record.
Form an LLC to Unlock This DeductionQuarterly Tax Reminder List
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Software that tracks this automatically
We are evaluating accounting tools that automatically separate home office expenses, calculate both IRS methods throughout the year, and pre-populate Form 8829. When we find one that genuinely earns a recommendation — one we would use ourselves — we will link to it here. No placeholders for products we haven't reviewed.
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Home office deduction questions answered
What is the IRS Simplified Method for the home office deduction?
What is the Actual Expense Method?
Can W-2 employees claim a home office deduction?
What does "regular and exclusive use" mean?
Does forming an LLC help with home office deductions?
Which method should I use?
How does the Simplified Method $1,500 cap affect things?
We value your privacy because we value ours
Every number you enter in this calculator stays on your device. We do not log it, store it, or transmit it. That is not a legal disclaimer — it is how we built the tool.