Home Office Planning & Reimbursement: The Deduction Depends on Who Uses the Space, Which Business Uses It, and How the Cost Is Reported

Home-office tax treatment depends on who uses the space, which business uses it, how regularly and exclusively it is used, and whether the taxpayer is self-employed or an employee-owner seeking reimbursement.

Establish qualifying business use

The space generally must satisfy the applicable exclusive-use and regular-use rules unless a statutory exception applies. Identify the specific trade or business and business purpose.

Entity structure changes the reporting method

A Schedule C proprietor may claim a home-office deduction under the applicable rules. An S corporation shareholder-employee generally should not assume the same personal deduction is available; an accountable-plan reimbursement may be the cleaner route when requirements are met.

Choose and document the allocation method

The simplified method and actual-expense method can produce different results. For actual expenses, distinguish direct from indirect costs and support the business-use percentage.

Depreciation affects future home-sale tax

Depreciation allowed or allowable for business use can affect gain treatment on a later residence sale. Preserve depreciation history even if future returns stop claiming the office.

Revisit when use changes

A move, new office, employee status change, business closure or mixed use can end or alter the deduction. Do not carry the percentage forward automatically.