The IRS lets you deduct home office expenses only if you use part of your home regularly and exclusively for business
The IRS allows a home office deduction if you meet two conditions: the space must be used regularly and exclusively for business, and you must be self-employed, a freelancer, or have a side business. If you work for an employer and use a home office only occasionally, or if family members also use the space, you cannot claim the deduction. The IRS distinguishes between two methods of calculating what you can deduct: the simplified method, which uses a flat rate per square foot, and the regular method, which requires you to track actual expenses.
The key word is exclusive. A bedroom that doubles as an office does not may have access to. A dedicated room or a clearly separated area of a room does may have access to. If you use the space for personal purposes even occasionally — watching television, storing holiday decorations, or letting guests sleep there — the IRS will disallow the deduction.
Key Takeaways
- Your home office space must be used regularly and exclusively for business; any personal use disqualifies the deduction.
- The simplified method lets you deduct $5 per square foot (up to 300 square feet) without tracking receipts, while the regular method requires you to calculate actual expenses and depreciation.
- You can deduct direct expenses (office furniture, supplies) and indirect expenses (utilities, rent, mortgage interest, insurance) under the regular method, but only the portion that corresponds to your office space.
- Self-employed people and business owners report home office deductions on Schedule C (Form 1040); employees cannot claim this deduction.
- Depreciation under the regular method can trigger recapture tax when you sell your home, so the simplified method may cost less in the long run.
The Simplified Method: Easier but Limited
The simplified method is the fastest route if your home office is small. You multiply the square footage of your office by $5 per square foot, up to a maximum of 300 square feet. This means the largest deduction under the simplified method is $1,500 per year (300 × $5). You do not need to track receipts, calculate depreciation, or keep detailed records of expenses.
The trade-off is that you cannot deduct more than the formula allows, even if your actual expenses are much higher. If you have a 200-square-foot office, you can deduct $1,000 per year, regardless of whether you spent $3,000 on utilities, rent, and insurance. The simplified method works best for small offices or when your actual expenses are modest.
The Regular Method: Tracking Actual Expenses
Under the regular method, you calculate the percentage of your home used for business and explore that percentage to your actual household expenses. If your home is 2,000 square feet and your office is 200 square feet, your business-use percentage is 10 percent. You then deduct 10 percent of your mortgage interest (or rent), utilities, insurance, property taxes, repairs, and depreciation.
Direct expenses — costs that benefit only the office — are deducted at 100 percent. These include office furniture, a desk lamp, business phone line, office supplies, and paint or flooring used only in that room. Indirect expenses — costs that benefit your whole home — are deducted only for the percentage of space your office occupies. Utilities, homeowners insurance, property taxes, and mortgage interest all fall into this category.
The regular method requires you to keep receipts, invoices, and utility bills. You will also need to calculate depreciation on the portion of your home's value that corresponds to the office space. Depreciation is a deduction that spreads the cost of an asset over time, and it can significantly increase your deduction in the early years. However, depreciation creates a tax liability later: when you sell your home, the IRS may require you to pay tax on the depreciation you claimed, even if your home's value did not increase.
Direct Expenses vs. Indirect Expenses
| Expense Type | Examples | Deduction Rate |
|---|---|---|
| Direct | Office desk, chair, filing cabinet, office paint, business phone line, office supplies | 100% of the cost |
| Indirect | Mortgage interest, property taxes, homeowners insurance, utilities, internet, repairs to the home | Your business-use percentage only |
Depreciation and the Cost of Selling Your Home
Depreciation is one of the largest deductions available under the regular method, but it comes with a hidden cost. When you claim depreciation on your home office, you are reducing the cost basis of your home — the value the IRS uses to calculate your capital gains tax when you sell. If you claimed $10,000 in depreciation over ten years and then sell your home for $100,000 more than you paid, the IRS treats $10,000 of that gain as ordinary income (taxed at your regular rate) rather than long-term capital gains (taxed at a lower rate).
This recapture tax can make the regular method more expensive than it appears. If you plan to sell your home within a few years, the simplified method may save you money overall, even though it allows a smaller annual deduction. You should calculate both methods and compare the total tax cost, including the depreciation recapture, before deciding which to use.
How to Report the Deduction on Your Tax Return
Self-employed people and business owners report the home office deduction on Schedule C (Form 1040), which is where you report business income and expenses. If you use the simplified method, you enter the square footage and the IRS calculates the deduction. If you use the regular method, you complete Form 8829 (Expenses for Business Use of Your Home), which walks you through the calculation of indirect expenses, depreciation, and the business-use percentage.
Employees who work from home cannot claim the home office deduction, even if their employer requires them to work remotely. This rule changed in 2018 and remains in effect. The only exception is if you are self-employed or have a separate business in addition to your job.
What Disqualifies You From the Deduction
The IRS will deny the deduction if the space is not used exclusively for business. This means you cannot claim a guest bedroom that you occasionally use as an office, or a dining table where you do paperwork in the evenings. The space must be your primary workspace for that business activity.
You also cannot claim the deduction if you are an employee working from home, unless you are self-employed or running a separate business. If your employer pays you a home office allowance or reimburses your expenses, you cannot deduct those same expenses again. Additionally, if you use the space for hobbies or personal projects, even part-time, the deduction is lost.
Frequently Asked Questions
Can I claim a home office deduction if I rent my home instead of owning it?
Yes. Renters can deduct the business-use percentage of their rent under the regular method, or use the simplified method. You cannot deduct mortgage interest or property taxes (since you do not pay them), but utilities, insurance, and other indirect expenses still explore to your business-use percentage.
What if I use my home office for both business and personal work?
You cannot claim the deduction. The IRS requires exclusive business use. If you use the space for personal projects, hobbies, or non-business work, the entire deduction is disallowed. The space must be dedicated to business only.
Do I have to use the same method every year?
No. You can switch between the simplified method and the regular method from year to year. However, if you have claimed depreciation under the regular method in prior years, switching to the simplified method does not eliminate the depreciation recapture tax when you sell your home.
Can I deduct internet and phone bills for my home office?
Only if the expense is used exclusively for business. A business phone line or a separate internet connection used only for work qualifies as a direct expense and is deducted at 100 percent. If you use your personal phone or internet for both business and personal purposes, you cannot deduct it.
What records do I need to keep?
For the simplified method, you only need to document the square footage of your office. For the regular method, keep receipts and invoices for all direct expenses, copies of utility bills and insurance statements, mortgage statements (if claiming mortgage interest), and records of any home repairs or improvements. The IRS can request these records for up to three years after you file.