Calculate your home office deduction using the IRS simplified method ($5/sq ft) or regular method. See federal and SE tax savings for self-employed filers.
The IRS offers two methods: Simplified ($5/sq ft, max 300 sq ft = $1,500 max) and Regular (office % × actual home expenses including depreciation). Self-employed filers deduct on Schedule C via Form 8829 (regular method) or directly (simplified). W-2 employees cannot claim this deduction on federal taxes (suspended by TCJA through 2025). The exclusive-use requirement is strictly enforced — the space must be used only for business.
The home office deduction allows self-employed individuals to deduct a portion of their home costs when they use part of their home exclusively and regularly for business. The IRS provides two calculation methods: the simplified method and the regular (actual expense) method. You choose the method each year — you are not locked in permanently — though switching between methods in different years can affect depreciation carryovers.
The simplified method is exactly what it sounds like: multiply your office square footage by $5 per square foot, up to a maximum of 300 square feet ($1,500 maximum deduction). No tracking of actual expenses, no depreciation schedule, and no Form 8829 required. For small home offices with modest home expenses, the simplified method is often comparable to the regular method with far less paperwork.
For self-employed individuals, the home office deduction reduces net Schedule C income, which reduces both federal income tax and self-employment tax (15.3%). This double benefit makes the home office deduction particularly valuable. A $3,000 home office deduction at the 22% federal bracket with full SE tax saves approximately $1,119 — a 37.3% effective benefit on the deduction.
David is a self-employed graphic designer who uses a 200 square foot dedicated office in his 1,500 sq ft home. His annual home expenses: $18,000 rent, $1,200 renters insurance, $2,400 utilities. He is a single filer in Texas (no state income tax) with $80,000 net self-employment income.
David saves $1,072 in taxes by using the regular method — nearly triple what the simplified method would save ($383). For renters with significant monthly rent, the regular method almost always wins because rent is the largest home expense and the $1,500 simplified cap is easily exceeded. Homeowners should also factor in depreciation, which can further increase the regular method's advantage.
Exclusive use is non-negotiable
The IRS requires exclusive and regular use — the space cannot double as a guest bedroom, play area, or personal storage. A dedicated room with a door is the safest approach. The IRS does not require a separate entrance, but the space must be identifiable as solely a business workspace. One exception: if you use part of your home to store inventory or product samples for a retail or wholesale business, you don't need the exclusive-use test for that storage area.
Depreciation recapture for homeowners
Homeowners who use the regular method must include home depreciation in their deduction calculation. While this increases the annual deduction, it creates depreciation recapture when the home is sold — the IRS taxes recaptured depreciation at up to 25%. If you plan to sell your home in the near future and use the home sale exclusion ($250,000 single/$500,000 MFJ), the business-use portion is not eligible for the exclusion. Renters avoid this complication entirely since they have no depreciation to recapture.
S-Corp owners: use an accountable plan
S-Corp owners who pay themselves a salary cannot deduct home office expenses directly on their personal return (TCJA suspended the employee deduction). Instead, the S-Corp should implement an accountable plan that reimburses the owner-employee for home office expenses. The S-Corp deducts the reimbursement as a business expense, reducing S-Corp income — which flows through to the owner's K-1 — without triggering income tax on the reimbursement. This achieves the same result as a direct deduction but requires proper documentation and regular reimbursement payments.
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The home office deduction is available to self-employed individuals, independent contractors, sole proprietors, and partners in partnerships who use part of their home exclusively and regularly for business. W-2 employees cannot deduct home office expenses on federal taxes — this deduction was suspended for employees by the Tax Cuts and Jobs Act through 2025. If you are a W-2 employee, your employer should reimburse you for home office costs under an accountable plan. For S-Corp owners, the deduction can be taken through an accountable plan reimbursement arrangement even as an employee-owner.
The IRS simplified method allows you to deduct $5 per square foot of your home office space, up to a maximum of 300 square feet, for a maximum deduction of $1,500 per year. The simplified method requires no depreciation calculation, no Form 8829, and no tracking of actual home expenses. It is fast and audit-friendly. However, it caps at $1,500, which means if your actual home expenses multiplied by your office percentage exceed $1,500, the regular method produces a larger deduction.
The regular (actual expense) method calculates your deduction based on the percentage of your home used for business (office square footage ÷ total home square footage) multiplied by all qualifying home expenses. Deductible expenses include rent or mortgage interest, homeowners or renters insurance, utilities (heat, electric, internet), repairs and maintenance, and home depreciation. Home depreciation under the regular method can produce significant deductions but creates a "depreciation recapture" tax issue when you sell the home — up to 25% of the depreciation taken may be taxable at sale.
The IRS requires that the space used for business be used "exclusively and regularly" for that business purpose. Exclusive use means the space is not used for personal activities at any time. A dedicated home office room that you work in and never use for personal purposes qualifies. A kitchen table where you also eat meals does not qualify. A separate structure on your property (like a detached garage or studio) has more flexible rules. The "regular use" requirement means you use the space consistently for business, not just occasionally.
Internet expenses are partially deductible for home office users. If you use the regular method, your internet cost is included in the overall home expense calculation multiplied by your office percentage. If you also use internet for personal purposes (streaming, personal browsing), you may deduct only the business portion directly as a business expense separate from the home office calculation. Cell phone expenses that have business use are deductible proportionally — if you use your phone 70% for business, 70% of the bill is deductible. These expenses are deducted on Schedule C, not on Form 8829.