The home office deduction lets qualifying taxpayers deduct expenses for the business use of part of their home. It is often described as a red flag, but it is a legitimate deduction when the requirements are met and documented. The rules differ based on how you are organized, so the entity matters as much as the space.
The Core Tests
To qualify, the space must generally be used regularly and exclusively for business, and it must be your principal place of business or a place where you meet clients or customers in the normal course. A space used for both business and personal purposes typically does not qualify, with limited exceptions such as certain storage and daycare uses. A home office can qualify as a principal place of business if it is used for administrative or management activities and there is no other fixed location where you conduct substantial administrative work.
Sole Proprietors and Single-Member LLCs
For a sole proprietor, the deduction is claimed on the individual return using Form 8829 or the simplified method. The simplified method allows a set rate per square foot, up to a maximum square footage, and avoids allocating actual costs. The actual expense method allows a percentage of items such as mortgage interest or rent, utilities, insurance, and depreciation, based on the business-use percentage. Actual expenses may yield a larger deduction, but they require more records and can create depreciation recapture if the home is later sold.
S Corporation and C Corporation Owners
Owners who are employees of their own corporation are treated as employees for this purpose. Federal law currently does not allow employees to deduct unreimbursed home office expenses on the personal return. The common solution is for the corporation to reimburse the owner under an accountable plan, or to lease the space to the corporation under a written rental arrangement. Either approach should follow the rules and be supported by documentation. See Accountable Plans for Reimbursing Business Expenses.
Partners
Partners generally are not employees of the partnership for federal tax purposes, and unreimbursed partnership expense rules may allow the partner to deduct home office costs on Schedule E if the partnership agreement requires the partner to bear them. This is a technical area, and the partnership agreement should be reviewed.
The Income Limit and Carryovers
The deduction generally cannot exceed the gross income from the business use of the home minus other business expenses. Excess amounts can generally be carried forward to future years if the actual expense method is used.
Exclusive Use in Practice
Exclusive use means no personal activity in the space. A guest bed in the office, a family television, or regular personal use can undermine the deduction. Clearly separate the space, keep photos, and maintain a diagram with the measured square footage. If a room is used part of the year for the business and part for personal use, allocate carefully.
Home Sale Considerations
Claiming depreciation on a home office reduces basis and can create recapture when the home is sold, though the home sale gain exclusion may apply to the rest of the home. Owners using the simplified method do not claim depreciation on the home office space. Consider this before choosing a method.
A Hypothetical Illustration
Consider an S corporation owner who works from a dedicated room. The corporation adopts an accountable plan and each month reimburses the owner for a portion of utilities and rent or mortgage costs, based on the room's percentage of the home and supported by bills. At year end, the reimbursements are deducted by the corporation and are not treated as wages. The example is simplified and shows the structure rather than any figure.
Relationship to the Augusta Rule
The home office deduction and the Augusta rule concern different uses of the same home and can overlap in confusing ways. If your home is used as a full-time office, additional rental to the business for meetings should be evaluated carefully. Read The Augusta Rule: Renting Your Home to Your Business for its details.
Questions to Ask
- Does my space meet the regular and exclusive use test?
- What is the best method given my entity type?
- How will we document the calculation?
- What are the implications if I sell my home?
Take measurements and photographs while you set up the space. Those simple records can be very persuasive later.
Handling a Move or a Change in Use
If you move, change the size of your office, or begin using the space differently mid-year, the calculation needs to reflect that. Prorate for the months in each configuration and keep the supporting documents. If the space stops being used exclusively for business, the deduction should stop for the period that the test is no longer met.
Keep the Evidence Together
Keep a folder with measurements, photos, a floor plan, utility bills, and your calculation each year. If questions arise, a complete package resolves most of them quickly.
Frequently Asked Questions
Can I claim a home office if I work from my kitchen table?
Generally not, since the space would not be used exclusively for business.
Does working from home mean I can deduct rent for that space?
Only if the requirements are met and, for corporate owners, only through an appropriate arrangement such as an accountable plan.
Want to See How This Applies to Your Business?
Book a discovery call with AE Tax Advisors to talk through your entity, compensation, retirement, and deduction planning.
Book a Discovery CallEducational purposes only. This page is general education and is not tax, legal, or accounting advice. Tax laws change and outcomes depend on individual facts, so consult a qualified professional before acting. No result is guaranteed.