The home office deduction is one of the most-misunderstood items on small business returns. For Houston business owners working from home (which is more common than ever), it can be a meaningful annual deduction — or a tripwire that complicates your return without saving real money. Here’s the working knowledge.
Who can take it
You qualify if you have a part of your home used regularly and exclusively for business AND it’s either your principal place of business OR a place where you regularly meet clients or customers.
“Exclusively” is strict. A spare bedroom that doubles as a guest room doesn’t qualify. A corner of the kitchen used for billing while making dinner doesn’t qualify. The space has to be dedicated to business use.
The two methods
Simplified: $5 per square foot, capped at 300 sq ft = $1,500 max deduction. Easy, no records needed beyond the square footage, no depreciation recapture issues.
Actual expense: Calculate the business-use percentage of your home (e.g., 200 sq ft of business space / 2,000 sq ft total home = 10%). Deduct that percentage of mortgage interest, property tax, insurance, utilities, repairs, and depreciation on the home.
Actual expense usually beats simplified for any meaningful home office. The math:
- 200 sq ft office in a 2,000 sq ft home (10% business use)
- Annual home costs (utilities, insurance, repairs, etc.): $8,000 × 10% = $800
- Mortgage interest deduction (not counted again if itemizing): often $1,500-$3,000 of business portion
- Depreciation on $300K home (10% of $300K basis × 2.564% annual) = $769
- Total: $3,000-$4,000 versus $1,000 from simplified
Schedule C vs S-corp owner
If you’re a Schedule C sole proprietor, the deduction goes directly on your return. If you’re an S-corp owner, you can’t take it on your personal return — the corporation pays you for the use of the space through an “accountable plan” reimbursement (deductible by the corporation, tax-free to you).
For S-corp owners, the accountable plan reimbursement is often overlooked and worth getting right. Set up a written reimbursement policy, calculate the percentage, submit a monthly expense report, and the corp writes a check that’s deductible to the business and tax-free to you personally.
Common mistakes
- Claiming the deduction with W-2 employee status (not allowed since 2018 unless self-employed)
- Including space that’s not exclusively used for business
- Forgetting that depreciation has to be recaptured at sale (often a non-issue with the home sale exclusion)
- Missing the boost to vehicle deductions: if your home is your primary place of business, trips from home to clients become business miles
- Inflating square footage to game the percentage
The vehicle interaction
This is the often-missed upside. Once you have a qualifying home office, your home is your principal place of business. Driving from home to a client meeting is no longer commuting — it’s deductible business miles. For Houston where everything is a 25-mile drive, that one change can add $3,000-$8,000 of vehicle deductions per year.
Bottom line
If you genuinely use a part of your home regularly and exclusively for business, take the deduction — with actual expense method when the math supports it. If your home office is more aspirational than real, skip it. Sloppy claims attract scrutiny and the savings are modest.
To work through the right method for your specific situation, call (832) 594-0339 or contact us. Home office is a frequent piece of our individual tax work for Houston-based business owners.