If you work from home and run your own business, the home office deduction could be one of the most valuable write-offs on your return. But it’s also one of the most misunderstood — and claiming it incorrectly puts you in a bad spot with the IRS.
Here’s what you need to know to do it right.
Who Can Actually Claim This Deduction
If you receive a W-2, this deduction is not available to you on your federal return. The Tax Cuts and Jobs Act suspended the home office deduction for employees for tax years 2018 through 2025. Working remotely doesn’t change that — if your income comes from an employer, you don’t qualify at the federal level.
If you’re self-employed, a freelancer, an independent contractor, or a small business owner filing Schedule C — this deduction was built for you.
The Two Rules You Have to Meet
To deduct business expenses that apply to a part of your home, that part must be used exclusively and regularly as your principal place of business, or as a place where you meet patients, clients, or customers in the normal course of business. Internal Revenue Service
Both conditions — exclusive and regular — must be true at the same time.
Regular use means consistent, ongoing use for business. Not occasionally answering emails from the couch. According to IRS Publication 587, incidental or occasional business use does not count as regular use. The IRS looks at all facts and circumstances to make that determination. IRS
Exclusive use means that space is used only for business — nothing else. A kitchen table, a shared living room, or a guest room that doubles as an office won’t qualify. The space doesn’t have to be a full room, but it has to be a clearly defined area used strictly for work.
There are limited exceptions: if your home is the only fixed location of your business and you use a specific area to store inventory or product samples, exclusive use isn’t required for that storage space. Daycare providers also operate under a different set of rules.
What “Principal Place of Business” Actually Means
You don’t have to do all your work from home. Your home office qualifies as your principal place of business if you use it regularly and exclusively to manage the administrative side of your business — even if you serve clients or customers somewhere else.
However, if you have suitable space outside your home to conduct administrative or management activities and simply choose to use your home office instead, that space does not qualify. Internal Revenue Service The IRS is looking for necessity, not preference.
Two Ways to Calculate the Deduction
Once you confirm you qualify, you choose one of two IRS-approved methods. You can switch between them year to year, but you have to pick one per tax year and stick with it.
The Simplified Method
The simplified method allows a standard deduction of $5 per square foot of the home used for business, with a maximum of 300 square feet — and no home depreciation deduction or later recapture of depreciation for years you use this method. Internal Revenue Service
That caps the deduction at $1,500 per year. A 200 sq ft office = $1,000. Anything at or above 300 sq ft = $1,500.
No Form 8829 required. No tracking of actual home expenses. Clean and simple — but if your real housing costs are high, you may be leaving money on the table.
One important limit: the simplified method cannot reduce your business net profit below zero, and unused deductions don’t carry forward to the next year.
The Regular Method
The regular method takes more recordkeeping, but it typically produces a larger deduction for people with significant home expenses.
Deductible expenses include the business portion of real estate taxes, mortgage interest, rent, casualty losses, utilities, insurance, depreciation, maintenance, and repairs. Internal Revenue Service
You calculate your business-use percentage by dividing your office square footage by your home’s total square footage. If your office is 250 sq ft and your home is 2,000 sq ft, your business-use percentage is 12.5%. That percentage applies to your indirect home expenses. Direct expenses — like repairs made specifically inside your office — are deductible in full.
Use Form 8829 to calculate your allowable expenses and report them on Schedule C, along with any carryover to the following year of amounts that exceeded your deduction limit. Internal Revenue Service
Unlike the simplified method, unused deductions under the regular method can carry forward to future years.
Which Method Is Better?
Run the numbers for your situation before you decide. If your office is small and your home expenses are modest, the simplified method may get you close to the same result with far less effort. If you rent in a high-cost city, own a home with significant mortgage interest, or your office takes up a meaningful percentage of your total square footage, the regular method will almost certainly produce a larger deduction.
The IRS lets you evaluate this every year. Whatever you choose, you lock it in by filing that way on your original return — you can’t amend later to switch methods for the same year.
Documentation the IRS Expects to See
Good records are what protect you if you’re ever questioned. At minimum, keep:
- Accurate measurements of your office and your total home square footage
- Photos of your dedicated workspace
- All home-related expense records if you’re using the regular method (utility bills, mortgage statements, insurance, repair invoices)
- Any documentation that shows the space is used exclusively and regularly for business
The IRS doesn’t require a specific format, but it does require that you can support every number on your return.
Don’t Leave This Deduction on the Table
The home office deduction reduces both your income tax and your self-employment tax — which makes it doubly valuable for sole proprietors. If you qualify and aren’t claiming it, you’re overpaying.
Not sure which method makes sense for your business, or whether your space actually qualifies? Book a free consultation here and we’ll walk through it with you.