Resources · Guide
The home office deduction. Who qualifies, and how to claim it.
The home office deduction is real, valuable, and widely misunderstood. The internet is full of bad advice that gets people audited. This guide walks through who actually qualifies under current IRS rules, the two calculation methods, what counts as 'exclusive and regular use,' and why W-2 employees can't claim it (even after the pandemic).
8 min read· Twin Cities, Minnesota
The short version
- Who qualifies: self-employed people (Schedule C, Schedule E for landlords) who use part of their home exclusively and regularly for business.
- Who doesn’t: W-2 employees. Even fully remote ones. The Tax Cuts and Jobs Act killed this for W-2 employees in 2018; the change is still in effect.
- Two methods: simplified ($5/sq ft, max 300 sq ft = $1,500) or actual (proportional share of mortgage interest, property tax, utilities, insurance, depreciation).
- Exclusive and regular use is the key test.A guest room used as an office sometimes doesn’t qualify. A dedicated room that you also use for personal storage doesn’t qualify.
- Audit risk:the home office deduction is not the red flag it used to be — but inflating square footage or claiming a room used for mixed purposes still is.
The two qualifying tests.
To claim the home office deduction, your space must meet two IRS tests:
Test 1: Exclusive use. The space is used only for business. A guest room that doubles as your office when guests aren’t there fails this test. A corner of the living room with a desk fails (the rest of the living room is personal). A converted garage used only for business passes.
The IRS makes two narrow exceptions to exclusive use: storage of inventory or product samples in a wholesale/retail business, and a daycare-licensed in-home service.
Test 2: Regular use. You use the space regularly for business, not just occasionally. A few hours of work a week probably qualifies; twice a year doesn’t.
Plus your home office must be your principal place of business OR a place where you meet with clients OR a separate structure used in your trade. For most self-employed people the first test (principal place) is met automatically.
W-2 employees: still no.
The Tax Cuts and Jobs Act of 2017 eliminated the home office deduction for W-2 employees starting in 2018, even if you work from home full-time, even if your employer doesn’t provide an office, even after the pandemic. This is current law.
What you CAN do as a W-2 employee:
- Ask your employer for an accountable plan reimbursement — tax-free reimbursement for actual home-office costs. Many employers offer this; not all advertise it.
- If you have side self-employment income (1099, consulting, freelance), you can claim home office against that business income — not your W-2 wages, but proportionally against the side income.
- For Minnesota specifically: MN follows federal on this. No state add-back available.
The bad advice circulating online about claiming home office as a W-2 remote worker is wrong. It will fail an audit.
Simplified method vs. actual method.
The simplified method:
- $5 per square foot of qualifying office space
- Maximum 300 square feet = maximum $1,500 deduction
- No depreciation, no itemized home expenses
- Doesn’t reduce your home’s basis (which matters when you sell)
- Cleaner audit defense; less documentation needed
The actual-expense method:
- Calculate the office’s percentage of total home square footage (e.g. 150 sq ft office / 1,500 sq ft home = 10%)
- Deduct that percentage of: mortgage interest, property tax, insurance, utilities (gas, electric, water, internet), repairs
- Plus depreciation on the office portion of the home (this is where the real money is for homeowners)
- Requires good records and reduces home basis at sale (you recapture depreciation as ordinary income)
For most self-employed people, actual method beats simplified method when the office is over 100 sq ft AND the home has high utilities or significant mortgage interest. We model both methods for clients each year.
What counts as 'office expense' for the actual method.
Two categories of expenses:
Direct expenses (100% deductible): painting just the office, a new lock on the office door, dedicated office furniture (desk, chair, file cabinet), business-only phone line.
Indirect expenses (deductible at the office percentage): mortgage interest, property tax, homeowners insurance, gas, electric, water, sewer, internet (if not 100% business), general home repairs and maintenance that benefit the whole house, security system, HOA fees.
What doesn’t count: lawn care (unless you have a daycare), first telephone line, repairs to non-office areas, personal household items.
Common mistakes that trigger audit risk.
- Inflating square footage. Don’t count the hallway. Don’t count under the stairs. Don’t count the bathroom (unless it’s a dedicated office bathroom, which is rare).
- Claiming a room used for mixed purposes.“I work in my dining room most days” doesn’t qualify if the dining room is also where you eat.
- Claiming for a business you don’t actually run.A hobby that occasionally generates 1099-K income doesn’t support a home office deduction. The IRS calls this “not engaged in a trade or business for profit.”
- Forgetting the depreciation recapture when you sell. If you claimed actual-method depreciation, you owe ordinary income tax on that depreciation when you sell the home, even with the $250K/$500K primary-residence exclusion.
Self-employed and not sure if you qualify?