Free IRS-Based Tool — 2026

Home Office Deduction Calculator:
Simplified Method vs Actual Expenses

Enter your numbers once. See both IRS methods side by side, a 5-year projection, and a complete audit-ready documentation checklist — in under 60 seconds.

Based on Form 8829 & Rev. Proc. 2013-13 2026 tax year figures No account required

Tell us about your home and office

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Include all livable space — do not subtract bathrooms or hallways.

Measure only the area used regularly and exclusively for business.


Annual home expenses

Renters: use total annual rent. Homeowners: use mortgage interest only (from Form 1098). Do not include principal.

$

Electric, gas, water, internet. Do not include cable/streaming that is not business-related.

$

Annual premium only.

$

Work that benefits the whole home. Office-only repairs may be 100% deductible — use the Actual Method worksheet for those.

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This determines whether the deduction is available to you at all under current law.

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

  • Floor plan or measurement record
    Sketch, tape measure log, or building plans showing both office and total home square footage. Date and sign it.
  • 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.
  • Utility bills (12 months)
    Electric, gas, water, and broadband. Annual summary statements from your provider are acceptable.
  • Homeowners or renters insurance declaration page
    Shows annual premium. Keep the full policy page, not just the payment confirmation.
  • Repair and maintenance receipts
    Each receipt must show vendor, date, amount, and nature of work. Note whether it benefits the whole home or just the office.
  • Business use log or calendar
    Daily records — a shared Google Calendar, a time-tracking app, or a handwritten log — showing you used the space regularly for business throughout the year.
  • 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.
  • LLC or business formation documents
    Articles 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 Deduction
Registered agent service included — $99/year all-in
Coming Soon

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.

Home office deduction questions answered

What is the IRS Simplified Method for the home office deduction?
The Simplified Method allows self-employed individuals and LLC owners to deduct $5 per square foot of dedicated office space, up to 300 square feet, for a maximum annual deduction of $1,500. It requires no depreciation calculation, no Form 8829, and fewer records. Introduced in IRS Revenue Procedure 2013-13 and unchanged through 2026.
What is the Actual Expense Method?
The Actual Expense Method lets you deduct the business-use percentage — office square footage divided by total home square footage — of your actual home costs: rent or mortgage interest, utilities, insurance, and repairs. It also includes a depreciation component for homeowners. The Actual Method generally yields a larger deduction than the Simplified Method when your office is small relative to a high-rent home, and must be reported on IRS Form 8829.
Can W-2 employees claim a home office deduction?
No — not for federal taxes during 2018 through 2025. The Tax Cuts and Jobs Act suspended the employee home office deduction as a miscellaneous itemized deduction. If you are a W-2 worker who also runs a side business, you may claim the deduction for the business portion of your use. The suspension expires after 2025; the deduction may return for employees in 2026 tax year filings absent further legislation.
What does "regular and exclusive use" mean?
Your designated office area must be used on a regular basis solely for business — not as a guest room, hobby space, or personal workspace, even occasionally. The IRS enforces this literally. A desk in a shared living room does not qualify. A dedicated room with a door that is used only for business does. Partial-year use may qualify if the business operated during that period and the exclusive-use test was met throughout.
Does forming an LLC help with home office deductions?
An LLC does not automatically create a new deduction, but it strengthens your position considerably. It creates a clear legal record that a real business exists, which is evidence of the "principal place of business" element. An LLC taxed as an S-Corp opens the Accountable Plan reimbursement strategy, which is often more tax-efficient than a Schedule C deduction. It also separates your finances in a way that makes an audit substantially less likely.
Which method should I use?
This calculator shows you both. As a general rule: the Actual Method wins when your business-use percentage is high and your total home expenses are substantial relative to the $1,500 Simplified cap. The Simplified Method wins when your expenses are modest or you want to avoid the depreciation recapture issue at sale. You can switch methods year to year — you are not locked in — though the Simplified Method forfeits any carryforward from a prior Actual Method year.
How does the Simplified Method $1,500 cap affect things?
The Simplified Method caps at 300 square feet multiplied by $5, equaling $1,500 per year. If your office is larger than 300 square feet, the excess footage provides no additional benefit under this method. If your office is 150 square feet, your maximum Simplified deduction is $750. There is no carryforward with the Simplified Method — unused capacity is gone for that year.

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Estimate only — consult a licensed CPA or tax attorney before filing. This calculator is provided for educational and informational purposes. It does not constitute tax advice, legal advice, or a guarantee of any tax outcome. The IRS Simplified Method rate of $5/sq ft and the 300 sq ft cap are current as of the 2026 tax year per IRS Revenue Procedure 2013-13; verify with a tax professional that no legislative changes have occurred. Depreciation calculations for the Actual Method are not included in this tool — homeowners should obtain a complete Form 8829 analysis from their CPA. State income tax implications are not reflected. State LLC Service is not a CPA firm, tax firm, or law firm.