The home office deduction is one of the most valuable available to self-employed workers — and one of the most misunderstood. Let’s clear up who qualifies, how each method works, and how to decide which one to use.
Who qualifies?
You must use a specific area of your home regularly and exclusively for business. This means:
- The space must be used only for business — not as a guest room or general work-from-home spot
- It must be your principal place of business, or where you meet clients, or a separate structure
- If you’re an employee, you generally cannot use this deduction (post-2017 tax law change)
Method 1: Simplified
The IRS allows $5 per square foot of your home office, up to 300 square feet — a maximum deduction of $1,500.
Example — simplified method
Your home office is 200 sq ft.
200 × $5 = $1,000 deduction
No depreciation, no complex calculation. Done in 30 seconds.
Method 2: Regular (actual expenses)
Calculate the percentage of your home used for business (office sq ft ÷ total home sq ft), then apply that percentage to actual home expenses: rent/mortgage interest, utilities, insurance, repairs, and depreciation.
Example — regular method
Office: 200 sq ft. Total home: 1,600 sq ft. Business use = 12.5%
Annual home expenses: $24,000 (rent + utilities + insurance)
$24,000 × 12.5% = $3,000 deduction
Plus depreciation on the home portion — potentially another $400-800/year.
Which method wins?
In most cases, the regular method produces a larger deduction — especially if you rent (high rent = high base to percentage against) or have a large home office. The simplified method wins when your actual home expenses are low or your office is very small.
One important caveat: the regular method requires you to track and calculate depreciation, which creates a “depreciation recapture” issue if you sell your home. The simplified method avoids this entirely.
You can switch methods year to year
The IRS allows you to use simplified one year and regular the next. Calculate both each year and use whichever gives you the larger deduction. Just don’t forget to account for any depreciation taken in prior years if you switch back to regular.