The Home Office Deduction: Do You Qualify and How to Claim It

The home office deduction has a reputation for being an "audit magnet." In reality, it's a legitimate, valuable deduction that plenty of self-employed people qualify for and never claim — leaving real money on the table out of fear. Here's how it actually works.

Who qualifies for the home office deduction?

Two tests have to be met, and the first trips people up:

• Regular and exclusive use. You must use a specific area of your home only for business. The spare bedroom you also use as a guest room doesn't count; a room (or clearly defined area) used solely for your business does.
• Principal place of business. The space must be your main place of business, or where you regularly meet clients, or used for administrative work you don't do elsewhere.

Important: since recent tax law, this deduction is generally available to the self-employed, not to W-2 employees working from home. If you're a 1099 contractor, freelancer or business owner, it's likely on the table.

Two ways to calculate it

The simplified method: deduct a flat rate per square foot of office space, up to a set limit. Easy, no receipts, less paperwork — but often a smaller deduction.

The actual-expense method: deduct the business-use percentage of your real home costs — rent or mortgage interest, utilities, insurance, repairs and depreciation. More paperwork, but frequently a bigger deduction, especially if your home costs are significant.

You can choose whichever gives you the larger benefit, and you can switch year to year.

What expenses can you include?

• A share of rent or mortgage interest and property taxes
• A share of utilities — electricity, gas, water, internet
• Homeowners or renters insurance
• Repairs and maintenance for the office area
• Depreciation (actual-expense method, for homeowners)

The "share" is your office square footage divided by your home's total square footage.

Common myths and mistakes

• "It'll get me audited." Claimed honestly with real records, it's a normal deduction — not a red flag.
• Using the space for personal things too. This breaks the exclusive-use rule and disqualifies it.
• Not keeping records. Note your square footage and keep utility and housing records to back up the numbers.

The bottom line

If you're self-employed and have a dedicated work space at home, the home office deduction is very likely worth claiming — and it's just one of several write-offs owners miss. See our roundup of small business deductions, and if you'd like someone to make sure you're claiming everything correctly, our tax planning and business tax services are built for exactly that.