Question 1

Who qualifies for the home office deduction using Form 8829?

Accepted Answer

To qualify for the home office deduction, you must use a portion of your home regularly and exclusively for business purposes, and it must be your principal place of business, a place where you meet clients or customers in the normal course of business, or a separate structure not attached to your home used in connection with your trade or business. The 'regular and exclusive use' test is strictly enforced — the space must be used solely for business, not as a dual-purpose room (such as a guest bedroom that also serves as your office). There is an exception for daycare facilities that are used partly for non-business purposes, provided the space is regularly used for daycare. Employees who work from home generally cannot claim the deduction after the Tax Cuts and Jobs Act of 2017 eliminated the employee home office deduction for tax years 2018-2025; the deduction is currently available only to self-employed individuals and independent contractors who report business income on Schedule C.

Question 2

What is the difference between the regular method and the simplified method?

Accepted Answer

The regular method (calculated on Form 8829) allows you to deduct actual expenses based on the percentage of your home used for business. You calculate the business-use percentage by dividing the square footage of your dedicated office space by the total square footage of your home, then apply that percentage to your total housing expenses (mortgage interest, property taxes, insurance, utilities, repairs, depreciation). The simplified method, introduced in 2013, allows you to deduct $5 per square foot of home office space, up to a maximum of 300 square feet ($1,500 maximum deduction). The regular method typically produces a larger deduction for homeowners with significant mortgage interest and property taxes, while the simplified method is easier to calculate and does not require tracking individual expenses or calculating depreciation. You can switch between methods from year to year, but once you choose a method for a tax year, you cannot change it for that year.

Question 3

How do I calculate the business-use percentage of my home?

Accepted Answer

The business-use percentage is calculated by dividing the area of your home used exclusively for business by the total area of your home. The most common method is the square footage method: measure the square footage of your dedicated home office and divide it by the total square footage of your entire home. For example, if your office is 200 square feet and your home is 2,000 square feet, your business-use percentage is 10%. Alternatively, if the rooms in your home are approximately equal in size, you can use the room-count method: divide the number of rooms used for business by the total number of rooms. For instance, if you use one room out of eight equally sized rooms, your business-use percentage is 12.5%. The IRS does not specify which method you must use, but the square footage method is generally more precise and defensible in an audit. Whichever method you choose, maintain documentation (floor plans, measurements) to support your calculation.

Question 4

What expenses can I deduct on Form 8829?

Accepted Answer

Form 8829 allows two categories of expenses: direct expenses and indirect expenses. Direct expenses are costs that benefit only the business part of your home — for example, painting or repairing only your office room, or installing a dedicated phone line. You can deduct 100% of direct expenses. Indirect expenses benefit your entire home and must be allocated based on your business-use percentage — these include mortgage interest (or rent), real property taxes, homeowner's insurance, utilities (electricity, gas, water, internet), general home repairs and maintenance, security system costs, and homeowner association fees. Additionally, Form 8829 calculates depreciation on the business-use portion of your home, which allows you to recover the cost of your home (excluding land) over its useful life (39 years for nonresidential property or the applicable period). You cannot deduct expenses that are personal in nature, such as lawn care (unless the area is used for business), or costs for rooms that are not part of the business space.

Question 5

Does claiming the home office deduction increase my audit risk?

Accepted Answer

The home office deduction has historically had a reputation for triggering audits, but the reality is more nuanced. The IRS audits a very small percentage of individual returns overall (less than 0.5% in recent years), and while the home office deduction may draw scrutiny, a well-documented deduction with clear support for exclusive and regular business use is defensible. The key to avoiding problems is maintaining thorough records: keep a dedicated office space that is used only for business (not a corner of your living room); maintain a floor plan or photographs documenting the space; keep receipts for all expenses; and ensure your deduction is proportional to the actual space used. Unreasonable or outsized deductions relative to business income are more likely to draw attention than the mere presence of a home office claim. The simplified method ($5/sq ft) also reduces audit exposure because it eliminates the need to itemize and prove individual expenses.

Question 6

What happens to the depreciation when I sell my home?

Accepted Answer

When you sell a home on which you have claimed depreciation through Form 8829, the depreciation must be 'recaptured' as ordinary income under IRC Section 1250. This means the total depreciation you claimed (or were allowed to claim, even if you did not actually claim it) is taxed as ordinary income (up to a maximum rate of 25%) rather than at the lower capital gains rate. For example, if you claimed $15,000 in depreciation deductions over the years you claimed the home office deduction, that $15,000 would be taxed at up to 25% when you sell, regardless of whether you have a gain on the sale. Additionally, the business-use portion of your home may not qualify for the Section 121 exclusion ($250,000/$500,000 gain exclusion for primary residences) if the office is in a separate structure. However, if the office is within the main home, the full Section 121 exclusion generally applies to the gain, though the depreciation recapture still applies. This depreciation recapture is one of the trade-offs of the regular method that the simplified method avoids entirely.

Question 7

Can I claim the home office deduction if I also rent office space elsewhere?

Accepted Answer

Yes, you can claim the home office deduction even if you also rent or own a separate office space, as long as your home office qualifies as your principal place of business under IRS guidelines. The IRS determines your principal place of business by considering: (1) the relative importance of the activities performed at each location, and (2) the time spent at each location. If your home office is where you conduct your most important business activities (management, administrative, billing) and you spend a substantial amount of time there, it can qualify as your principal place of business even if you also have another workspace. The Tax Court has consistently held that a home office used for substantial administrative or management activities qualifies if there is no other fixed location where those activities are conducted. For example, a consultant who meets clients at their offices but performs all administrative work, billing, and planning from a home office can typically claim the deduction for the home workspace.

Feature	Regular Method (Form 8829)	Simplified Method
Maximum Deduction	No fixed cap — based on actual expenses	$1,500 (300 sq ft x $5/sq ft)
Depreciation	Yes — included in calculation, subject to recapture upon sale	No depreciation claimed or recaptured
Recordkeeping	Detailed — must track all housing expenses, maintain receipts, calculate percentage	Minimal — only need to know square footage of office space
Mortgage Interest / Taxes	Business portion deducted on Schedule C; personal portion on Schedule A	Full amount remains on Schedule A (no split)
Carryover of Excess	Yes — unused deduction carries forward to next year	No carryover — use it or lose it
Best For	Homeowners with large offices, high housing costs, willingness to track expenses	Small offices, renters, low housing costs, or those wanting simpler recordkeeping

Free Form 8829 Tax Form

What Is Form 8829?

Percentage-Based

Actual Expenses

Self-Employed Only

Form 8829 Preview

Form 8829

Regular Method vs. Simplified Method

Depreciation Recapture Warning

How to Calculate Your Home Office Deduction

Determine Business-Use Percentage (Part I)

Calculate Direct and Indirect Expenses (Part II)

Apply the Income Limitation

Calculate Depreciation (Part III)

Calculate Carryover and Final Deduction (Part IV)

Eligible Direct and Indirect Expenses

Direct Expenses (100% Deductible)

Indirect Expenses (Percentage-Based)

Frequently Asked Questions

Official Resources

Calculate Your Home Office Deduction