Home Office Deduction: Simplified vs Regular Method

TaxKiln Editorial · Last reviewed: May 25, 2026

A self-employed taxpayer may deduct expenses for a home office that is used exclusively and regularly as the principal place of business, or to meet clients, or as a separate structure used in the business (IRC §280A(c)). The simplified method ($5 per square foot, capped at 300 sq ft / $1,500) is fast and avoids depreciation recapture. The regular method (Form 8829) deducts business-use-percentage of actual expenses including a depreciation component.

The exclusive-and-regular-use test

**Exclusive** — the space is used solely for business. A guest room that doubles as an office fails; a dedicated corner of a room with a clear boundary can qualify. **Regular** — used on a continuing basis, not occasional or incidental. A storage area used only at year-end for inventory cannot anchor the deduction. The space must also be either (a) the principal place of business, (b) a place where you meet patients, clients, or customers in the normal course of business, or (c) a separate structure used in connection with the business.

Principal place of business — the §280A(c)(1)(A) safe harbour

Under the Soliman Supreme Court decision, a home office is the principal place of business if (i) you use it exclusively and regularly for administrative or management activities of the business, AND (ii) you have no other fixed location where you conduct substantial administrative or management activities. This safe harbour rescued the deduction for plumbers, electricians, and field-service professionals who do paperwork at home but earn revenue on customer sites.

Simplified method

$5 per square foot of home office space, capped at 300 sq ft (maximum $1,500). No depreciation, no recapture on sale, no Form 8829. Cannot exceed gross income from the business. Quick wins for filers with small home offices or those who do not want the future-tax friction of depreciation recapture.

Regular method (Form 8829)

Determine business-use percentage (office sq ft ÷ home sq ft, or rooms-of-comparable-size). Apply that percentage to direct expenses (repairs to the office itself: 100%) and indirect expenses (utilities, insurance, mortgage interest or rent, real estate tax: business-use %). Depreciation on the home is computed at 39-year nonresidential SL on the business-use portion of the building basis. The depreciation taken is subject to recapture as unrecaptured §1250 gain (max 25%) on later sale.

Day-care exception

A licensed day-care provider operating in the home is exempt from the exclusive-use requirement. The deduction is computed on a time-based percentage: hours of business use ÷ total hours in the year, multiplied by the area-based percentage. This is the most generous home-office regime in the Code.

Employees: not deductible (2018–2025)

TCJA suspended miscellaneous itemised deductions including unreimbursed employee home-office expenses for tax years 2018 through 2025. The deduction remains available for self-employed taxpayers (Schedule C, Schedule F, partner-of-partnership where required by partnership agreement). Status post-2025 depends on whether Congress acts before the TCJA sunset.

Worked example: Sam Patel, freelance illustrator (Portland, OR)

Sam has a dedicated 180 sq ft studio in a 1,800 sq ft home (10% business use). Schedule C net profit before the home office deduction is $84,000. Annual home expenses: utilities $3,600, insurance $1,400, mortgage interest $11,200, real estate tax $4,800. Home basis $360,000 (excluding land).

Simplified: 180 × $5 = $900 (under cap) Regular method (Form 8829): Indirect at 10%: utilities 360 + insurance 140 + mortgage interest 1,120 + RE tax 480 = 2,100 Depreciation: 10% × 360,000 ÷ 39 = 923 Regular method total: 3,023 Regular method beats simplified by $2,123 — but creates ~$923/yr of future §1250 recapture on home sale. Sam may choose simplified for the cleaner exit when he expects to move.

Statute references

Home office deduction (exclusive and regular use) — IRC §280A(c)
Day-care use exception — IRC §280A(c)(4)
Principal place of business safe harbour — IRC §280A(c)(1)(A) (post-Soliman)
Soliman — Supreme Court held a self-employed anaesthesiologist who spent most working hours at hospitals could not deduct his home office because the home was not his 'principal place of business'. Congress responded in 1997 by amending §280A(c)(1) to allow home-office deductions where the home is used for administrative or management activities and there is no other fixed location for those functions — specifically reversing the practical effect of Soliman for administrative-heavy self-employed workers. — Commissioner v. Soliman, 506 U.S. 168 (1993); Taxpayer Relief Act of 1997 (amending IRC §280A(c)(1)(A))

Last reviewed: May 25, 2026