The Home Office Deduction in 2026: Simplified Method vs. Form 8829

You pull up a client's Schedule C file. The bank statement shows utility bills, the mortgage is paid out of the business checking account, there's a line item for a Ring doorbell, and the client mentions in passing that she does all her client calls from a spare bedroom.

Now you have a decision. Do you claim the home office deduction? Which method? What happens if the client sells the house in three years?

Home office is one of the highest-leverage deductions on Schedule C and one of the most misapplied. The rules haven't fundamentally changed for 2026 — but the One Big Beautiful Bill Act (OBBBA), signed into law July 4, 2025, made one major change permanent that every preparer needs to know. We'll cover that, along with everything else you need to handle this deduction correctly.

What the OBBBA Actually Changed

Short answer: not much about the deduction itself, but one big thing about who can claim it.

Before the Tax Cuts and Jobs Act (TCJA) in 2018, W-2 employees who worked from home could claim unreimbursed employee business expenses — including a home office — as a miscellaneous itemized deduction subject to the 2% AGI floor. TCJA suspended that deduction through 2025.

OBBBA made the suspension permanent. Public Law 119-21 converted TCJA's temporary suspension into a permanent repeal of miscellaneous itemized deductions subject to the 2% floor. That means for tax years 2026 and beyond, W-2 employees categorically cannot deduct home office expenses on their personal return, no matter how much they work from home, no matter what their employer requires.

Practical impact: when a client comes to you confused about why their employer's remote-work policy doesn't translate into a tax deduction, you now have a permanent answer. The only legitimate workaround is an employer accountable-plan reimbursement, which is tax-free to the employee and deductible to the employer.

The home office deduction remains alive and well for self-employed individuals filing Schedule C, farmers filing Schedule F, and partners with unreimbursed partnership expenses properly documented under the partnership agreement.

Who Qualifies: The Two-Part Test

Self-employment alone doesn't get your client the deduction. The space must pass two tests, both codified in IRS Publication 587.

Regular use. The space must be used for business consistently, not occasionally. Once-a-month planning sessions don't count. Using a desk three days a week for client work does.

Exclusive use. The space must be used only for business. This is where most claims fall apart. A guest bedroom that hosts family twice a year? Fails. A kitchen table with a laptop? Fails. A dedicated room with a door, a desk, and nothing personal in it? Passes.

There are only two narrow exceptions to exclusive use: (1) licensed daycare services, and (2) storage of inventory or product samples where the home is the sole fixed business location.

On top of these two tests, the space must also be one of the following:

• The principal place of business (including administrative or management activities, if there's no other fixed location where the client conducts those)
• A place where the client meets patients, clients, or customers in the normal course of business
• A separate structure (detached garage, studio, workshop) used in connection with the business

The "principal place of business" prong is broader than most preparers realize. A general contractor who spends all day at job sites but handles scheduling, invoicing, and estimates from a home office can still qualify under the administrative-activities test established in Commissioner v. Soliman and codified in subsequent IRS guidance. Many preparers incorrectly disqualify these clients — don't.

Two Methods, One Choice Per Year

Once qualification is established, your client picks one of two calculation methods for the year. They can switch year to year — they're just locked in for the tax year once the return is filed.

	Simplified Method	Regular Method (Form 8829)
Rate / Basis	$5 per square foot	Actual expenses × business-use %
Maximum	300 sq ft ($1,500)	No cap
Form required	None — direct on Sch C Line 30	Form 8829
Depreciation	Zero (no recapture later)	Yes (recapture on sale)
Carryover	None — excess lost	Yes — excess carries forward
Mortgage/RE tax allocation	Stays 100% on Schedule A	Business % moves to 8829
Recordkeeping	Minimal	Detailed

Method 1: Simplified (Safe Harbor)

The simplified method, introduced in Revenue Procedure 2013-13, is exactly what it sounds like.

• Rate: $5 per square foot. Unchanged for 2026 — the IRS has not updated the rate since the method was introduced in 2013. Any source telling you the 2026 rate is $6 is wrong; the IRS FAQ page, Publication 587, and Topic 509 all confirm $5.
• Cap: 300 square feet
• Maximum deduction: $1,500 per year
• Where it goes: Directly on Schedule C, Line 30 — no Form 8829 required
• Depreciation: Zero, by rule. No recapture when the home is sold.
• Carryover: None. If the gross income limitation caps the deduction, the excess is lost forever — it does not carry forward.
• Mortgage interest and real estate taxes: Fully deductible on Schedule A as itemized deductions (subject to the SALT cap of $40,000 through 2029 per OBBBA). They are not reduced by the business-use percentage under the simplified method.

The simplified method is the right choice when:

• The client's home office is small (under ~150 sq ft) and housing costs are modest
• The client rents in a low-cost area and actual-method allocation wouldn't yield more than $1,500
• The client plans to sell the home in the next few years and wants to avoid depreciation recapture complications
• The client's recordkeeping is weak and pulling together a defensible Form 8829 would be a reconstruction project

Method 2: Regular (Form 8829)

The regular method calculates actual expenses allocated to the business portion of the home. It requires Form 8829 attached to Schedule C.

The calculation has two steps:

1. Determine the business-use percentage of the home. Most commonly: office square footage ÷ total home square footage. A 240 sq ft office in a 2,000 sq ft home = 12%.
2. Apply that percentage to the home's eligible indirect expenses.

Direct expenses are 100% deductible — these are costs that apply only to the office (painting the office, a repair specific to the office area).

Indirect expenses are deductible at the business-use percentage:

• Mortgage interest
• Real estate taxes
• Rent (if renting)
• Homeowners/renters insurance
• Utilities (electric, gas, water, trash)
• General repairs and maintenance (HVAC service, roof repair)
• Depreciation on the home (homeowners only)

Worked example. Client has a 240 sq ft office in a 2,000 sq ft home (12% business use). Annual costs:

• Mortgage interest: $14,000 → $1,680 deductible
• Real estate taxes: $6,000 → $720 deductible
• Insurance: $1,800 → $216 deductible
• Utilities: $4,200 → $504 deductible
• Repairs: $800 → $96 deductible
• Depreciation on home (business portion): $650 deductible

Regular method total: $3,866

Simplified method would be: 240 × $5 = $1,200

The regular method wins by $2,666 in this example. That's why high-housing-cost clients should generally use the regular method — if the recordkeeping is there.

The gross income limitation. The home office deduction (under either method) cannot exceed gross income from the business activity that uses the home office, reduced by other business expenses. If the deduction would create or increase a loss, it's capped. Under the regular method, any disallowed portion carries forward to future years. Under the simplified method, disallowed amounts are lost.

The Depreciation Recapture Trap

This is the part that burns preparers who haven't worked through a sale yet.

When a client uses the regular method and claims depreciation on the home's business portion (Form 8829, Part III), the IRS treats that depreciation as reducing the home's basis. When the home is later sold, the depreciation claimed — or claimable, whether the client actually claimed it or not — becomes unrecaptured Section 1250 gain and is taxed at a maximum rate of 25%.

Critically, this recapture applies even if the client qualifies for the full $250,000/$500,000 home sale exclusion under Section 121. The exclusion applies to the rest of the gain. The depreciation recapture bypasses it.

Example. Client claimed $800/year in home office depreciation for 10 years = $8,000 cumulative depreciation. When the client sells, up to $8,000 × 25% = $2,000 in recapture tax is owed, even if the total gain on the home is fully excluded.

Two planning implications:

1. For a client likely to sell within a few years, run the simplified method and compare the cumulative annual savings against the projected recapture cost. The simplified method may be the better long-term play even when the regular method wins annually.

1. If a client is already on the regular method, they should actually claim the depreciation. The IRS applies the "allowed or allowable" rule — recapture applies whether the depreciation was claimed or not. Skipping it gives up the deduction without escaping the tax.

The Numbers That Didn't Change for 2026

A few items worth confirming explicitly, because there's conflicting information floating around:

• Simplified rate: still $5 per square foot. The IRS has not adjusted this rate since Rev. Proc. 2013-13 was issued. Publication 587 (2025) and Topic 509 confirm $5 remains in effect for 2026.
• Simplified maximum: still 300 square feet.
• Simplified maximum deduction: still $1,500.
• Exclusive use requirement: unchanged.
• Principal place of business standard: unchanged.
• Depreciation recapture: unchanged at up to 25% (unrecaptured Section 1250 gain).

For S-Corp and C-Corp Shareholders

The home office deduction works differently for shareholder-employees. A shareholder cannot deduct home office expenses personally — they're W-2 employees of the corporation, permanently blocked by OBBBA. The correct mechanism is an accountable-plan reimbursement from the corporation to the shareholder for substantiated home office expenses:

• The corporation deducts the reimbursement as a business expense
• The shareholder receives the reimbursement tax-free

This requires a written accountable plan that meets the business-connection, substantiation, and excess-return requirements of Treasury Regulation § 1.62-2. Without the plan, the reimbursement becomes taxable wages.

Partnership partners face a similar issue with a cleaner path: if the partnership agreement requires partners to pay home office expenses without reimbursement, the partner can claim unreimbursed partnership expenses (UPE) on Schedule E, reducing the partner's share of partnership income.

What Tax Preparers See on Bank Statements

Here's the write-up angle every preparer navigates. When you're processing a client's bank statement, transactions that look like home office expenses can't simply be categorized and dropped onto the P&L. They have to be flagged for the home office calculation because they're only partially deductible.

Transactions to flag for home office review:

• Mortgage payments (need interest vs. principal split — only interest portion is eligible)
• Rent payments (if home is rented)
• Utility bills paid from the business account — electric, gas, water, trash
• Homeowners or renters insurance
• General home repairs and maintenance
• HVAC service, roofing, plumbing
• Property tax payments

Transactions that may be direct expenses (100% deductible):

• Office furniture purchases specific to the home office
• Business phone line (separate from home phone)
• Business internet (if separately metered)
• Repairs specific to the office area

The core principle: if an expense relates to the whole home, it's indirect and allocated by business-use percentage. If it relates only to the office, it's direct and 100% deductible. This distinction drives the entire Form 8829 calculation.

This is why competent categorization tooling should never auto-categorize a mortgage payment or utility bill as a business expense on Schedule C. The correct behavior is to flag these for home office review so the preparer can handle the allocation. WriteupOS does this automatically — any transaction that pattern-matches to a home-related expense is routed to the review queue rather than dropped on a line item.

Common Mistakes That Cost Clients (and Preparers)

After enough returns, you start seeing the same errors:

1. Claiming space that isn't exclusive. A "home office" that's actually the dining room, or a spare bedroom that also stores Christmas decorations, has no valid deduction. If audited, the entire deduction is disallowed. Better to not claim than to claim incorrectly.

2. Counting non-qualifying space. Hallways, bathrooms, and general storage areas used for both business and personal aren't includable in the business square footage.

3. Mixing methods mid-year on the same home. One method per home per year. If a client sets up a new office mid-year in a second home, that's the only scenario where you'd potentially use different methods on different properties in the same return.

4. Double-dipping on Schedule A. Under the regular method, the business-use percentage of mortgage interest and real estate taxes shifts from Schedule A to Form 8829. The remaining portion goes on Schedule A. You cannot deduct the full amount on both.

5. Forgetting the gross income limitation. A client with a $15,000 loss business and $4,000 in home office expenses cannot turn that loss into $19,000. The deduction is capped at what brings the business to zero.

6. Skipping depreciation on the regular method. Because of the "allowed or allowable" recapture rule, there's no benefit to leaving depreciation unclaimed. Take it.

7. Assuming W-2 remote workers qualify. They don't. OBBBA made this permanent. If they ask, point them to an accountable plan through their employer.

The Decision Framework

When you're handling home office on a Schedule C client, walk through this:

1. Does the space pass regular and exclusive use? If no, stop. No deduction.
2. Is it the principal place of business, a client-meeting location, or a separate structure? If no, stop.
3. Run both methods. Calculate simplified ($5 × sq ft, max 300) and regular (actual indirect expenses × business-use %).
4. Consider the sale timeline. If the client plans to sell in the next 3–5 years, weight the simplified method's lack of recapture against the regular method's annual savings.
5. Consider recordkeeping strength. If the client has reconstructed records or thin documentation, the simplified method is more defensible.
6. Consider gross income limits. If the business is trending toward a loss year, the simplified method loses unused amounts forever; the regular method carries them forward.
7. Document. Measurements, photos, a floor plan. The exclusive use requirement is the most commonly challenged element in audits.

The Bottom Line for 2026

The home office deduction in 2026 looks almost identical to the home office deduction in 2025 — except the W-2 exclusion is now permanent thanks to OBBBA. The simplified method remains at $5/sq ft with a $1,500 cap. The regular method remains the bigger deduction for most qualifying clients with meaningful housing costs. And depreciation recapture remains the hidden cost that most preparers don't model until a client sells.

When you're processing write-up work, flag every transaction that touches the home — mortgage, rent, utilities, insurance, home repairs — for home office review. Never categorize them directly to a Schedule C line. The allocation is either on Form 8829 or it's a deliberate simplified-method election, and either way it's your call to make, not the software's.