The home office deduction is one of the most talked-about — and most misunderstood — tax write-offs available to self-employed people and business owners. Used correctly, it can save you hundreds or thousands of dollars. Used incorrectly, it can be a red flag that invites IRS scrutiny.

The Golden Rule: Regular and Exclusive Use

The IRS requires that your home office space be used regularly and exclusively for business. That word "exclusively" is where most people get tripped up. If your home office is also where your kids do homework, where you watch TV, or where you occasionally work from your couch — it doesn't qualify.

The space doesn't have to be a separate room, but it does need to be a clearly defined area used only for business. A dedicated desk in a corner of your bedroom can qualify. A kitchen table where you sometimes work does not.

Who Actually Qualifies

• Self-employed individuals and sole proprietors: Yes, if you meet the regular and exclusive use test
• S-Corp or C-Corp owners: You can deduct home office expenses through an accountable plan — not directly on your personal return
• W-2 employees: No longer eligible for the home office deduction (the Tax Cuts and Jobs Act eliminated this for 2018–2025)
• Remote workers: If you're a W-2 employee working from home, you cannot deduct your home office

Two Ways to Calculate the Deduction

The IRS offers two methods:

• Simplified Method: $5 per square foot of your home office, up to 300 square feet (maximum $1,500 deduction)
• Regular Method: Calculate the percentage of your home used for business (office sq ft ÷ total home sq ft) and apply that percentage to actual home expenses (mortgage interest, rent, utilities, insurance, repairs)

“The simplified method is easier. The regular method often produces a larger deduction. Run both calculations and choose the one that benefits you most.”