Disclaimer: This article is educational and does not constitute tax advice. Implementation details depend on your specific facts. Consult a licensed CPA. Circular 230 applies.
In This Article
- Why Can't S-Corp Owners Deduct Business Expenses on Their Personal Return?
- What Is an Accountable Plan?
- How Does the Home Office Deduction Work Under an S-Corp Accountable Plan?
- What Other Business Expenses Can Be Reimbursed Under an Accountable Plan?
- How to Set Up an Accountable Plan
- What Is the Difference Between an Accountable Plan and a Non-Accountable Plan?
- What Are the NJ-Specific Tax Considerations for S-Corp Accountable Plans?
- Accountable Plan Documentation Checklist
- Sources
- Frequently Asked Questions
- Ready to File With Confidence?
Why Can't S-Corp Owners Deduct Business Expenses on Their Personal Return?
An S-Corp owner-employee generally cannot deduct unreimbursed employee business expenses on the personal return under current federal law.
Under pre-TCJA law, employees could deduct unreimbursed business expenses as miscellaneous itemized deductions on Schedule A. The TCJA eliminated this deduction starting in 2018, and the OBBBA made this elimination permanent (IRC §67(h), redesignated from former §67(g) by OBBBA §70110). The miscellaneous itemized deduction is not coming back.
This means an S-Corp owner-employee who pays out-of-pocket for:
- A home office used exclusively for S-Corp work
- Business mileage not reimbursed by the corporation
- Business travel, meals, professional subscriptions
...gets no deduction at all on their personal return.
One possible reimbursement framework is an accountable plan: an arrangement under which the S-Corp reimburses qualifying employee business expenses when the federal requirements are satisfied. Adoption, administration, and the treatment of each underlying expense depend on the corporation's facts and records.
What Is an Accountable Plan?
An accountable plan (IRC § 62(c) and Treas. Reg. § 1.62-2) is a corporate reimbursement arrangement that meets three IRS requirements:
- Business connection: Reimbursements are only for actual business expenses
- Substantiation: Employees must substantiate expenses with receipts, logs, or documentation within a reasonable period (typically 60 days)
- Return of excess: Employees must return any reimbursement that exceeds actual business expenses within a reasonable period (typically 120 days)
When all three requirements are met:
- Reimbursements are not taxable income to the employee
- The S-Corp may deduct the underlying expense only to the extent the ordinary-and-necessary, business-purpose, substantiation, allocation, timing, capitalization, and category-specific rules allow; accountable-plan treatment does not override limits on meals or other expenses
- Reimbursements do not appear on the employee's W-2
An accountable plan is one possible reimbursement framework for S-Corp owner-employees when its business-connection, timely-substantiation, timely-return-of-excess, and payment requirements are satisfied. A written policy can provide contemporaneous documentation, but it is not a separate federal qualification test. Accountable-plan treatment does not guarantee a net tax benefit.
How Does the Home Office Deduction Work Under an S-Corp Accountable Plan?
An accountable plan can address qualifying home-office costs when the reimbursement arrangement and Section 280A requirements are satisfied.
Calculation Method
The home office deduction is based on the percentage of your home used exclusively and regularly for business, for space that also meets the Section 280A(c)(1) tests described below.
Step 1: Calculate the home office percentage:
Office square footage / Total home square footage = Home office percentage
Example: 200 sq ft office / 2,000 sq ft home = 10%
Step 2: Apply this percentage to eligible home expenses:
| Home Expense | Annual Amount | 10% Business Portion |
|---|---|---|
| Rent (or mortgage interest + depreciation) | $24,000 | $2,400 |
| Real estate taxes | $9,500 | $950 |
| Utilities (electric, gas, internet) | $4,200 | $420 |
| Homeowners insurance | $1,800 | $180 |
| Repairs attributable to entire home | $2,000 | $200 |
| Total home office reimbursement | $4,150 |
Step 3 illustration: Assume the $4,150 is paid under an arrangement that satisfies the accountable-plan rules and the underlying home-office amount is otherwise allowable. On those assumptions it is treated as a corporate expense rather than employee wages. A simple $4,150 × (32% + 6.37%) computation is approximately $1,592, not $1,750, but QBI, income tax, payroll treatment, New Jersey rules, and the complete returns determine the actual result.
Exclusive Use Requirement
The office space must be used exclusively and regularly for business - and exclusive, regular use alone is not enough. Because the S-Corp owner is an employee, IRC Section 280A(c)(1) also requires that the use be for the convenience of the employer and that the space meet one of the qualifying-use tests: the principal place of business (including substantial administrative or management work with no other fixed location for it), a place where you regularly meet clients or customers, or a separate structure. A guest bedroom that doubles as an office does not qualify. A dedicated room (even if small) used only for business work can qualify when those tests are met. Document the employer-convenience requirement (for example, a corporate resolution noting the company provides no other office space) along with photos and a written description.
Depreciation on Owner-Occupied Homes
For homeowners, the home office deduction includes a portion of depreciation on the home's structure. This creates a tax cost when you sell the home: under IRC § 121(d)(6), gain attributable to depreciation allowed or allowable after May 6, 1997 cannot be excluded under the primary-residence exclusion. That gain is generally recognized as unrecaptured Section 1250 gain (taxed at up to a 25% maximum federal rate); ordinary-income recapture under Section 1250 applies only in the limited cases where its 'additional depreciation' rules are triggered. The rest of an otherwise qualifying gain can still be excluded under § 121.
Whether an arrangement reimburses depreciation-related home-office cost must be determined from the plan, actual reimbursement, Section 280A rules, and the later Section 121(d)(6) consequences.
What Other Business Expenses Can Be Reimbursed Under an Accountable Plan?
An accountable plan may cover a substantiated expense that has the required business connection and otherwise satisfies the applicable deduction, timing, and allocation rules, including potentially:
Mileage
Reimburse business mileage at the IRS standard rate: $0.70/mile TY2025; for 2026, $0.725/mile through June 30 and $0.76/mile from July 1 (Announcement 2026-11). Employees must keep a contemporaneous mileage log showing date, destination, business purpose, and miles.
Illustration: Assume an owner-employee has 5,000 substantiated qualifying business miles spread evenly across 2026 and the accountable-plan requirements are met. The reimbursement calculation is 2,500 × $0.725 + 2,500 × $0.76 = $3,713 ($3,500 at the TY2025 rate). Actual corporate and employee treatment depends on the plan's operation, mileage facts, records, and applicable limits.
Cell Phone
The business-use percentage of monthly cell phone costs. If the phone is used 70% for business, reimburse 70% of the monthly bill.
Professional Development
Books, courses, conferences, and professional memberships related to the business.
Business Software and Subscriptions
SaaS subscriptions, cloud storage, professional software used for business purposes.
Travel and Business Meals
Transportation and lodging may be current business-travel expenses when the trip is temporary, primarily business, away from the tax home, ordinary, necessary, unreimbursed, and substantiated; personal days, companion costs, commuting, indefinite assignments, and capital or prepaid amounts require separate treatment. Qualifying business meals are generally subject to the federal 50% limitation and the Section 274 substantiation rules.
How to Set Up an Accountable Plan
Step 1: Adopt a Written Plan
Draft written accountable-plan terms. Although a written plan is not by itself required, written terms and consistent records can support the business-connection, substantiation, and return-of-excess requirements; treatment depends on the facts and records.
The plan should specify:
- What types of expenses are reimbursable
- Documentation required (receipts, mileage logs)
- Submission timeline (e.g., within 60 days of expense)
- Return-of-excess timeline (e.g., within 120 days of advance)
- Approval process (even for solo owner-employees)
Step 2: Document Expenses
Maintain records for each expense: receipt or log, date, amount, business purpose, and parties involved (for meals). A credit-card statement alone may not establish the item purchased or business purpose; retain itemized support and purpose records.
Step 3: Submit and Reimburse on a Regular Schedule
Use the substantiation and reimbursement cadence stated in the plan and supported by the facts. The owner-employee submits the required expense record; the corporation applies its approval process and records any payment.
Step 4: Record on the S-Corp Books
Record each reimbursement under the proper underlying expense, asset, or other account supported by the transaction, rather than as a distribution or officer compensation. Deductibility, capitalization, and timing still follow the rules for the underlying item.
Step 5: Do Not Include on W-2
A reimbursement that satisfies the accountable-plan rules generally is not included in Box 1 wages. An amount treated under a nonaccountable arrangement is included in wages and may remain a compensation deduction to the corporation; the actual plan operation, payroll reporting, and underlying expense facts control.
What Is the Difference Between an Accountable Plan and a Non-Accountable Plan?
| Feature | Accountable Plan | Non-Accountable Plan |
|---|---|---|
| Taxable to employee? | No | Yes |
| Deductible by corporation? | Only as the underlying expense rules allow | Generally as compensation when otherwise allowable |
| Subject to FICA/payroll tax? | No | Yes |
| Employee deduction available? | N/A (not taxable) | No (eliminated by TCJA) |
| Documentation required? | Yes (receipts + logs) | No |
| Appears on W-2? | No | Yes (as wages) |
Under a nonaccountable arrangement, reimbursements are included in wages and subject to the applicable income-tax and FICA rules, while the employee generally cannot deduct the underlying unreimbursed business expenses under current Section 67(h).
What Are the NJ-Specific Tax Considerations for S-Corp Accountable Plans?
NJ GIT Treatment
NJ GIT follows federal law in treating accountable plan reimbursements as nontaxable. Reimbursements properly made under an accountable plan are not included in NJ gross income.
NJ CBT Deductibility
Reimbursements under an accountable plan are deductible by the S-Corp for NJ CBT purposes in the same manner as they are for federal purposes.
NJ Home Office and Property Taxes
NJ treatment of a home-office reimbursement depends on the accountable-plan requirements, the employee's qualifying-use facts, eligible costs and allocation, corporate records, and the complete federal and NJ returns. A supported corporate expense and an owner-level itemized deduction are different computations, but no SALT-cap or net-tax benefit is promised.
Accountable Plan Documentation Checklist
- Document the arrangement. Written terms can identify covered expenses, substantiation, approval, reimbursement, and return-of-excess procedures, but actual operation must satisfy Treasury Regulation §1.62-2. Obtain legal drafting help when needed.
- Preserve the payment trail. Use corporate books and payment records that identify the corporation, employee, expense report, approval, amount, and date. Legal entity-separateness or liability questions require counsel and do not turn on one bank-account fact.
- Follow the plan's substantiation cadence. Retain receipts and complete the expense record required by the written terms within the applicable reasonable-period rules.
- Document any home-office reimbursement. Identify the qualifying space and use, eligible direct and indirect costs, a supportable allocation, employer-convenience facts, Section 280A limitations, and the records used in the calculation.
- Record reimbursements on S-Corp books. Use the proper underlying expense, asset, or other account and the payment or payable account supported by the actual transaction. Do not misclassify a qualifying accountable-plan reimbursement as a distribution or officer compensation.
- Verify your W-2. Accountable plan reimbursements should NOT appear in Box 1 (wages). If your payroll provider is adding them to your W-2, that's an error, correct it before filing.
- Reconcile the filed return. Trace supported reimbursements to the corporation's books and the actual Form 1120-S lines under the current instructions; classification and return effects depend on the underlying expenses and complete return.
Sources
- IRC Section 62(a)(2)(A) (accountable plan above-the-line treatment)
- Treasury Regulation § 1.62-2 (accountable plan requirements: business connection, substantiation, return of excess)
- IRC Section 280A (home office rules, exclusive and regular use requirement)
- Rev. Proc. 2013-13 (safe harbor method: $5/sq ft, max 300 sq ft)
- IRS Publication 463 (Travel, Gift, and Car Expenses)
- NJ CBT: N.J.A.C. 18:7-5.4 (S-Corp New Jersey income reporting)
An accepted written tax scope may include reviewing accountable-plan records and the resulting federal and NJ return treatment. Monaco CPA does not draft legal plan documents, operate payroll, transmit reimbursements, or promise a deduction or tax outcome.
Frequently Asked Questions
Can a sole proprietor use an accountable plan?
No. Accountable plans are an employer-employee arrangement. Sole proprietors are self-employed and report eligible business expenses directly on Schedule C. For an S-Corp owner-employee, an accountable plan governs qualifying reimbursements when its requirements and actual operation are satisfied.
Does every S-Corp need a written accountable plan?
The federal rules do not make a written plan a separate qualification requirement. A contemporaneous written plan can document the arrangement's terms, eligible expenses, substantiation procedure, and return-of-excess requirement; actual operation must still satisfy those rules.
Can I reimburse myself for prior-year expenses?
Possibly, within limits. Crossing a calendar year is not automatically disqualifying. Under Treas. Reg. § 1.62-2(g), an employee is deemed to substantiate within a reasonable period when substantiation occurs within 60 days after the expense is paid or incurred. Reimbursement requests for much older expenses require facts-and-circumstances review and generally will not satisfy the accountable-plan requirements. The regulation does not state a general employer reimbursement-payment deadline.
What if I rent office space in my own home to my S-Corp?
An S-Corp may instead pay rent to an owner under a genuine reasonable arrangement, which creates owner-level rental reporting and can implicate passive-activity and related-party rules. Compare the actual rent terms, accountable-plan requirements, entity deduction, owner income, and complete return without assuming a preferred structure.
How does the accountable plan interact with the QBI deduction?
A supported reimbursement treated as a corporate expense can reduce S-Corp ordinary income and the owner's qualified business income for Section 199A purposes. The complete result depends on accountable-plan operation, the underlying expense, wages, taxable income, QBI limitations, federal and NJ treatment, and the rest of the return; no net benefit is assumed.
Related reading: Starting a Business in NJ | LLC vs S-Corp NJ | NJ Payroll Basics | Small Business Services
Ready to File With Confidence?
Tax rules change frequently. Use the contact form to request a written scope; submitting it does not promise a call, engagement, or outcome. Greg Monaco is a NJ-licensed CPA and the firm's sole practitioner.
