Accountable Plan Rules: Tax-Free Expense Reimbursement

An accountable plan is an employer reimbursement arrangement that meets three IRS conditions, so the money it pays out is not wages. Under Treasury Regulation 1.62-2, the expense must have a business connection, the employee must substantiate it within a reasonable period, and any excess advance must be returned. Get all three right and the reimbursement stays off the W-2 and out of payroll tax. Miss one and the whole payment becomes taxable wages.

That distinction is worth more in 2026 than it has ever been. Unreimbursed employee business expenses used to land on Schedule A as a miscellaneous itemized deduction. Section 67(g) suspended those deductions starting in 2018, and the 2025 tax law made the suspension permanent, so there is no year in which they come back. For an S corporation owner who pays for a home office, a cell phone, or business miles out of pocket, an accountable plan is now the only path to a tax-free recovery of those costs.

What is an accountable plan?

An accountable plan is a set of rules an employer follows when it advances or reimburses employee business expenses. It is not a form you file with the IRS. It is an arrangement, evidenced by how you actually operate, that satisfies Regulation 1.62-2(d) through (f). When it does, the reimbursement is excluded from the employee's income, does not appear in Box 1 of the W-2, and carries no income tax withholding, Social Security, Medicare, or federal unemployment tax. The employer still deducts the expense.

A nonaccountable plan is anything that misses. Regulation 1.62-2(c)(3) and (c)(5) say those amounts go into gross income, get reported as wages on the W-2, and are subject to withholding and employment taxes. The employee then has no deduction to offset them, which is the whole trap.

What are the three requirements of an accountable plan?

All three must be satisfied. Failing any single one turns the arrangement, or the failing portion of it, into a nonaccountable plan.

Business connection. Under Reg. 1.62-2(d), the plan may only pay advances, allowances, or reimbursements for deductible business expenses the employee paid or incurred in performing services for the employer. An amount paid regardless of whether the employee incurs an expense fails this test on its own.
Substantiation. Under Reg. 1.62-2(e), the employee must substantiate each expense to the employer within a reasonable period of time. Travel, lodging, meals, gifts, and listed property such as a vehicle or cell phone must meet the stricter Section 274(d) standard.
Return of excess. Under Reg. 1.62-2(f), the plan must require the employee to return any advance that exceeds substantiated expenses, again within a reasonable period.

What is the 60 day rule for expense reimbursement?

The 60 day rule is one leg of the fixed date safe harbor in Reg. 1.62-2(g)(2)(i), which defines what counts as a reasonable period of time. Substantiation is due within 60 days after the expense is paid or incurred. The other two legs are a 30 day window before, and 120 days after. Practitioners shorthand it as 30 before, 60 to substantiate, 120 to return.

Deadline	What has to happen	Authority
30 days before	An advance may be paid no more than 30 days before the expense is paid or incurred	Reg. 1.62-2(g)(2)(i)(A)
60 days after	The employee substantiates the expense to the employer	Reg. 1.62-2(g)(2)(i)(B)
120 days after	The employee returns any amount advanced above what was substantiated	Reg. 1.62-2(g)(2)(i)(C)
Quarterly statement	Alternative method: the employer sends a periodic statement of unsubstantiated amounts at least quarterly, and the employee has 120 days from that statement to substantiate or return	Reg. 1.62-2(g)(2)(ii)

These are safe harbors, not the only way to be reasonable. A facts and circumstances test still applies. But if you are inside the safe harbor you do not have to argue about it, which is the entire point of building a written policy around those numbers.

What expenses can be reimbursed under an accountable plan?

Anything that would be an ordinary and necessary business expense if the employer had paid it directly. In practice the recurring list looks like this:

Business travel: airfare, lodging, rental cars, and the meals and incidentals that go with an overnight trip.
Business miles driven in a personal vehicle, at the 2026 IRS standard rate of 72.5 cents per mile, or actual vehicle costs.
Business meals with a client or a contact, still 50 percent deductible to the employer under Section 274(n). Entertainment stays fully nondeductible after the Tax Cuts and Jobs Act.
The business-use portion of a cell phone and home internet.
A home office used regularly and exclusively for the employer's business, reimbursed on a computed pro rata share of actual home costs.
Tools, supplies, professional dues, licenses, and continuing education.

What cannot be reimbursed tax free: commuting miles between home and a regular workplace, entertainment, and personal costs dressed up as business ones. Reimbursing those does not make them deductible, it just creates wages.

How do I set up an accountable plan for my S corp?

An S corporation owner who works in the business is a shareholder-employee, not a sole proprietor. Costs you pay personally are personal, full stop, unless the corporation reimburses them. Since Section 67(g) permanently bars the old Schedule A deduction for unreimbursed employee expenses, an accountable plan is the mechanism, and there is no backup plan.

The steps are unglamorous and they work:

Adopt a written accountable plan by corporate resolution, dated before the first reimbursement. The regulation does not require writing, but a dated policy is what you hand an examiner. Getting the resolution signed and dated by the officers before any money moves is a five minute job that decides the audit.
Have every shareholder-employee submit an expense report with receipts and the business purpose, on a schedule that fits inside the 60 day window. Monthly is common.
Reimburse by separate check or transfer, never through payroll, and never as a round number that happens to match a salary reduction.
Book the reimbursement to the right expense account on the corporate books, not to shareholder distributions.
Compute the home office reimbursement as an actual pro rata share of mortgage interest or rent, insurance, utilities, and repairs. Do not pay yourself rent for a home office, which triggers Section 280A problems and rental income.

Are accountable plan reimbursements taxable?

No. Reimbursements paid under a qualifying accountable plan are excluded from the employee's gross income, are not reported as wages on Form W-2, and are exempt from income tax withholding and FICA. That is stated directly in Reg. 1.62-2(c)(2) and (c)(4). The employer deducts the expense in the ordinary course, subject to the usual limits such as the 50 percent haircut on meals.

Reimbursements under a nonaccountable plan are the opposite: taxable wages in Box 1, subject to withholding and payroll taxes on both sides. In 2026 the Social Security wage base is $184,500, so for most owners a nonaccountable reimbursement means a real 15.3 percent employment tax cost on top of income tax.

What is the difference between an accountable and nonaccountable plan?

The difference is documentation and return of excess, not intent. Here is what a plan looks like on each side of the line.

Practice	Accountable	Nonaccountable
Vehicle	Mileage log with dates, miles, and purpose, paid at the standard rate	Flat $500 a month car allowance with no log
Phone	Business-use percentage of the actual bill, submitted monthly	Fixed stipend regardless of the bill
Advances	Unspent advance returned within 120 days	Employee keeps whatever is left over
Receipts	Submitted with amount, date, place, and business purpose	Not required, or collected but never reviewed
Payroll effect	Nothing on the W-2, no FICA	Full amount in Box 1, income tax and FICA due

One pattern deserves its own warning. Cutting salary and relabeling the difference as an expense reimbursement is wage recharacterization, and the examples in Reg. 1.62-2(j) treat it as nonaccountable no matter how the paperwork reads.

What records does the substantiation requirement actually demand?

For ordinary expenses, enough evidence to show the amount, date, and business purpose. For anything covered by Section 274(d), which means travel, lodging, meals, gifts, and listed property, Regulation 1.274-5 requires adequate records proving five elements: amount, time, place, business purpose, and, for meals and gifts, the business relationship of the people involved.

On receipts specifically, Reg. 1.274-5(c)(2)(iii) sets two rules that people routinely get backwards. Documentary evidence is required for any lodging expense while traveling away from home, at any dollar amount, and for any other expenditure of $75 or more. Below $75, a contemporaneous record of the elements can carry the expense, though a receipt is still the stronger record. Digital copies count. The IRS has accepted legible electronic images as documentation since Revenue Procedure 97-22.

This is where accountable plans fall apart in practice. The rules are simple, but collecting and reading a hundred receipts a month is not. A business expense tracker that reads each receipt into merchant, date, category, and amount turns the substantiation file into a spreadsheet you can actually review inside the 60 day window, instead of a folder of photos nobody opens.

Can an accountable plan use per diem instead of receipts?

Yes, for travel. Revenue Procedure 2019-48 lets an employer pay a per diem allowance in place of reimbursing actual lodging, meals, and incidentals. The amount deemed substantiated for each day is the lesser of the allowance paid or the federal per diem rate for that locality. The employee still has to substantiate the time, place, and business purpose of the trip. Only the amount is deemed substantiated.

Two limits matter for owners. Anything paid above the federal rate is treated as paid under a nonaccountable plan and becomes wages unless it is returned or separately substantiated. And an employee who is related to the employer, which under Publication 463 includes anyone owning more than 10 percent in value of the corporation's stock, cannot rely on the per diem shortcut at all. Those owners must be able to prove actual expenses to the IRS even after accounting to the company. There is also no optional lodging per diem for anyone deducting their own travel, so lodging is always actual cost with a receipt.

Does an accountable plan have to be in writing?

Regulation 1.62-2 does not require a written document. It requires an arrangement that meets the three tests, and behavior can establish it. In an examination, though, a dated written policy plus a stack of consistent expense reports is what proves the arrangement existed before the reimbursements, rather than being invented afterward. Every practitioner who has defended one will tell you to write it down.

Common mistakes that cost real money

The S corp owner buys equipment personally, never submits a reimbursement, and loses the deduction entirely because Schedule A is closed.
Flat monthly allowances for phone or vehicle with no logs, which fail the business connection test and become wages.
Expense reports that record the amount and date but never the business purpose, the element examiners ask for first.
Reimbursing commuting miles, which are personal under any plan.
Reimbursing entertainment, which has been nondeductible to the employer since the Tax Cuts and Jobs Act even when the business purpose is genuine.
Substantiating in February for the prior June, well outside the 60 day safe harbor.

Making the plan run itself

An accountable plan is a monthly rhythm, not an annual project. Employees submit, someone reviews, the company reimburses, and the excess comes back. The failure point is always the middle: reading receipts and matching them to a report. Batch the receipts, extract the merchant, date, category, and total into one sheet, and the review takes minutes. From there the reimbursement lines reconcile against the card statement, which is easier when you can turn the PDF statement into a spreadsheet and match on amount and date.

If your team files formal reports, the same extracted data drops into expense report software as itemized lines, or straight into your ledger. If you are a single-owner S corp, one monthly upload of receipts through a receipt scanner for taxes and one reimbursement check is the entire compliance routine.

For the travel side of the plan, our guides on deducting business travel expenses and the business meals deduction cover what qualifies before you reimburse it. And if you want the receipts to stop being the bottleneck, scanning receipts for expenses turns the pile into report-ready rows.

This article explains general federal tax rules as of July 2026 and is not tax advice. Rules change and facts matter, so confirm your situation with a CPA or tax attorney.