The home office deduction lets self-employed people write off the part of their home they use for business, either at a flat $5 per square foot or by deducting a share of their actual home costs. If you run a side hustle or work for yourself from a spare room, this is one of the bigger write-offs people leave on the table. We're big on keeping more of what you earn here at Personal Profitability, and this is one of the cleanest ways to do it. It sits next to the other small business expenses you can deduct, but it has its own rules. The catch: the space has to be used only for work, and W-2 employees can't take it at all.
What is the home office deduction?
It's a tax break, sometimes called the home office tax deduction, that lets you deduct expenses for the portion of your home you use regularly and only for business purposes. The IRS gives you two ways to figure it. You can use the simplified method, which is a flat rate per square foot, or the regular method, which deducts a slice of your real home costs. It works whether you own or rent, and it covers houses, apartments, condos, mobile homes, and even a boat you live on, per IRS Publication 587. The deduction lives on your Schedule C, so it lowers both your income tax and your self-employment tax. To be eligible, you have to be self-employed and pass the use tests below.
Who qualifies for the deduction?
You qualify if you're self-employed and you use part of your home regularly and exclusively for your business. That covers freelancers, independent contractors, gig workers, and small business owners who file a Schedule C. W-2 employees can't claim it. The IRS suspended that unreimbursed employee deduction for tax years after 2017, so a regular paycheck job working from home does not count, even if your employer never gives you a desk. These office deductions are for self-employed individuals running real business activities, not for a salaried worker who happens to answer email at home.
The IRS sets two tests, and you have to pass both.
- Exclusive use. The space is a dedicated area used exclusively for business. A desk in the corner of a room you use for business and nothing else passes. The kitchen table where the family eats dinner does not. Any personal use of that exact space breaks the rule.
- Regular use. You use the space on a regular basis, not once in a while. Occasional or incidental use doesn't count.
You also have to show the space is your principal place of business. Your home counts as your principal place of business if you use it exclusively and regularly for the admin or management side of your work and you have no other fixed location where you do substantial admin work. So a contractor who does the job at client sites but handles all the billing, scheduling, and books from a home office still qualifies. You can also qualify if you meet clients, patients, or customers there, or if you use a separate structure like a detached garage or studio.
Two exceptions skip the exclusive-use test. If you store inventory or product samples at home for your only business location, that storage space is fine even if it isn't used only for that. And a licensed daycare run from your home doesn't need to meet exclusive use, per Publication 587.
The two ways to calculate it
You can calculate it one of two ways each year: the simplified method or the regular method. The simplified method trades a smaller, capped deduction for almost no paperwork. The regular method takes more record keeping but can be worth far more if your home costs are high or your office is big. You can switch between them year to year. Here's how they stack up.
| Feature | Simplified method | Regular method |
|---|---|---|
| How it's figured | $5 per square foot of office space | Actual home costs × business-use percentage |
| Size limit | Up to 300 square feet | No size limit |
| Maximum deduction | $1,500 | No fixed cap (limited by business income) |
| Record keeping | Just your square footage | Receipts for every home expense |
| Depreciation | None, and none to recapture later | Allowed, but recaptured when you sell |
| Mortgage interest & property tax | Full amount on Schedule A | Split between Schedule A and the business |
| Where you claim it | Schedule C | Form 8829, then Schedule C |
How the simplified method works
The simplified method, which the IRS calls the simplified option, is a flat $5 per square foot of office space, up to 300 square feet, for a maximum deduction of $1,500. The IRS set that rate in Revenue Procedure 2013-13, and it has held since. You measure the space, multiply by $5, and you're done. No receipts, no depreciation, no Form 8829. It's the easy way to determine your home office expenses when the space is small.
Say your office is 150 square feet. Multiply 150 by $5 and you get a $750 deduction. If your office is 400 square feet, you still only count 300, so you cap out at $1,500. With this method you also claim your full mortgage interest and property taxes on Schedule A as usual, with no split. The downside: you can't deduct depreciation, and you can't carry any unused deduction to next year.
How the regular method works
The regular method deducts the business-use percentage of your actual home office expenses, figured on Form 8829, Expenses for Business Use of Your Home. First you determine your percentage. Divide your office square footage by your home's total square footage. If your home is 2,000 square feet and your office is 200, that's 10 percent. Your deduction is then based on that share of your home costs.
Then you sort your costs into two buckets, per Publication 587:
- Direct expenses apply only to the office, like painting that one room. You deduct these in full.
- Indirect expenses cover the whole home, like rent, utilities, insurance, and repairs. You deduct the business-use percentage of these.
Stick with the 10 percent example. If you spent $20,000 for the year on rent, utilities, insurance, and general repairs, you could deduct 10 percent of that, or $2,000. Homeowners can also deduct depreciation on the business share of the house, which the simplified method doesn't allow. That's where the regular method pulls ahead for a real office in a high-cost home.
How to claim the home office deduction on your taxes
You claim the home office deduction on your Schedule C, the form where you report self-employment income and expenses. The path depends on your method.
- Measure your office and your home. Get the square footage of the space you use only for work and the total square footage of your home.
- Pick a method. Run the simplified $5-per-foot math and the regular percentage math, then take whichever is bigger if you have the records for it.
- Fill out the right form. For the simplified method, you enter the deduction directly on Schedule C. For the regular method, you complete Form 8829 first, then carry the result to Schedule C.
- Keep your records. Save a note of your square footage, and for the regular method save receipts for rent, utilities, insurance, and repairs in case the IRS asks.
If this is your first year paying tax on business income, the deduction also feeds into what you owe each quarter. See our guide to paying quarterly estimated taxes so you don't get a surprise bill in April.
Limits and mistakes to avoid
Your deduction can't be more than the income your business earned from that home use. The IRS calls this the gross income limitation, and it means the deduction can't create or grow a business loss. In plain terms, it can't turn a thin profit into a paper loss. Under the regular method you can carry the unused part to next year. Under the simplified method you lose it. A few more traps catch people every year:
- Claiming a space that isn't exclusive. The guest room that doubles as a gym fails the exclusive-use test. Be honest about the space.
- Forgetting depreciation recapture. If you used the regular method and took depreciation, you may owe tax on that amount when you sell the home, separate from the usual home-sale exclusion.
- Taking it as an employee. If your only income is a W-2 job, you can't claim it, no matter how much you work from home.
- Guessing your square footage. Measure it. A round number with no basis is the kind of thing that looks wrong on paper.
None of this is individualized tax advice. The rules have edge cases, so confirm your situation with a tax pro or check the IRS source directly before you file.
The bottom line on the home office deduction
If you work for yourself from home, the home office deduction is real money for a space you're already paying for. Measure the room, make sure you use it only for work, and run both methods before you file. The simplified $5-per-foot route is the easy win for a small office, and the regular method pays off when your home costs are high. For more on keeping your tax bill down, read our tax tips for self-employed people and the complete beginner guide to freelancing. You can browse the rest of our taxes coverage too. Keep the receipts, stack it with your other deductions, claim what's yours, and put that money back into the business.