IRS Form 8829: Complete Guide for 2026
Form 8829 — Expenses for Business Use of Your Home
Form 8829 calculates the deduction for using part of your home for business. If you work from home and have a dedicated space used regularly and exclusively for business, this form lets you deduct a portion of your rent or mortgage, utilities, insurance, repairs, and depreciation. It can be one of the largest deductions available to home-based freelancers.
Who Needs to File
Self-employed individuals who use part of their home regularly and exclusively as their principal place of business. The space must be used solely for business — a desk in your living room doesn't qualify unless that area is used exclusively for work. Employees working from home generally cannot claim this deduction.
Filing Deadline
Filed with your Form 1040 and Schedule C. Due April 15, 2027 for tax year 2026, with extension available to October 15, 2027.
Key Lines Explained
| Line | Name | What It Means |
|---|---|---|
| Line 1 | Area used regularly and exclusively for business | The square footage of your dedicated home office space. Measure the actual area used only for business. Be precise — the IRS may ask for documentation. |
| Line 2 | Total area of your home | The total square footage of your home. Your business percentage is Line 1 divided by Line 2. |
| Lines 9-21 | Deductible expenses (direct and indirect) | Direct expenses (benefit only the office, like painting the office) are 100% deductible. Indirect expenses (benefit the whole home, like utilities and insurance) are deductible at your business percentage. |
| Line 36 | Allowable deduction | Your total home office deduction, which flows to Schedule C Line 30. This may be limited if your gross income from the business is less than your total expenses. |
The square footage of your dedicated home office space. Measure the actual area used only for business. Be precise — the IRS may ask for documentation.
The total square footage of your home. Your business percentage is Line 1 divided by Line 2.
Direct expenses (benefit only the office, like painting the office) are 100% deductible. Indirect expenses (benefit the whole home, like utilities and insurance) are deductible at your business percentage.
Your total home office deduction, which flows to Schedule C Line 30. This may be limited if your gross income from the business is less than your total expenses.
Common Mistakes to Avoid
- 1
Claiming a space that isn't used exclusively for business — a guest bedroom that doubles as an office doesn't qualify
- 2
Using the simplified method ($5/sq ft, max 300 sq ft) when the regular method on Form 8829 would yield a larger deduction
- 3
Forgetting to include depreciation of the home, which can be a significant part of the deduction
- 4
Not adjusting the deduction when the business area or total home area changes during the year
- 5
Claiming home office expenses that exceed gross business income — the deduction is limited to your net income from the business
How TaxTidy Helps With Form 8829
TaxTidy tracks your home-related expenses throughout the year — rent, mortgage, utilities, insurance, and repairs — so calculating your Form 8829 deduction is automatic. Our home office calculator compares the simplified method versus the regular method and recommends whichever saves you more.
Frequently Asked Questions
What is the simplified method for the home office deduction?
The simplified method lets you deduct $5 per square foot of home office space, up to 300 square feet, for a maximum deduction of $1,500. No Form 8829 needed — you enter the deduction directly on Schedule C Line 30. It's easier but often results in a smaller deduction than the regular method.
Can I claim the home office deduction if I rent my home?
Yes. Renters can deduct the business percentage of rent, utilities, renter's insurance, and other housing costs. You don't need to own your home to claim the home office deduction.
Does claiming a home office deduction increase my audit risk?
The home office deduction has historically been an audit trigger, but the IRS has relaxed its scrutiny as remote work has become common. As long as you meet the exclusive and regular use test and keep good records (photos of the space, measurements, utility bills), the risk is minimal.
Can I deduct internet and phone costs with Form 8829?
You can deduct the business percentage of your internet bill as an indirect expense on Form 8829. For phone costs, deduct only the business-use percentage of your cell phone bill as a separate Schedule C expense (Line 25), not on Form 8829.
TaxTidy provides expense organization tools based on the most current US tax law available to it. TaxTidy is not a CPA, Enrolled Agent, or licensed tax professional. All categorizations, deductions, and tax calculations are estimates. Please verify all data for accuracy and consult a certified tax professional before filing.
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