How to Reimburse Employees for Expenses: Accountable Plan Rules

To reimburse employees for expenses without creating taxable wages, set up what the IRS calls an accountable plan: a written arrangement that ties each payment to a business purpose, requires the employee to document the expense, and recovers any advance money that wasn’t spent. Meet those conditions and the reimbursement stays off the W-2, with no income tax withholding and no Social Security or Medicare tax on either side. Miss any one of them and every dollar you’ve paid out gets reclassified as wages.

The Three Conditions That Make a Plan Accountable

An accountable plan has to satisfy all three of the following. There is no partial credit.

Business connection. The expense must relate to work the employee actually performs for you. Personal costs that happen to occur during a business trip don’t qualify just because they appear on the same trip report.¹

Substantiation. The employee has to document each expense with enough detail for the IRS to verify amount, date, place, and business purpose. The safe-harbor deadline is 60 days after the expense was paid or incurred.²

Return of excess. If you advanced money or paid an allowance that turned out to be more than the substantiated expenses, the overage has to come back. The IRS treats 120 days after the expense as a reasonable deadline for the return.²

If you front money before a trip, that advance should go out no more than 30 days before the expected expense. The three timing windows fit together: 30 days before, 60 days to substantiate, 120 days to return anything unused. A written policy that names these deadlines and a payroll process that enforces them is what an accountable plan looks like in practice.

When all three conditions are met, reimbursements are tax-free to the employee and fully deductible to the employer (with the meal exception below).¹

What Happens If the Plan Fails

If the arrangement misses any of the three requirements, the IRS treats the whole plan as non-accountable. Every reimbursement paid under it becomes wages on the employee’s W-2, subject to income tax withholding and FICA.¹

The exposure isn’t limited to the company. If the IRS finds you should have been withholding and didn’t, the trust fund recovery penalty can be assessed personally against anyone at the company responsible for payroll decisions, and the agency can pursue that person’s own assets through liens and levies.³ The typical failure pattern is informal reimbursement: cash handed back, a check cut with no paperwork behind it, no one complaining. The problem shows up during an audit, and by then the back taxes and penalties are far larger than the original payments.

Which Expenses You Can Reimburse Tax-Free

To be reimbursable tax-free, an expense has to be ordinary and necessary for your trade or business. Ordinary means common in your industry; necessary means helpful and appropriate for running the business.⁴

Travel and Mileage

Travel expenses include airfare, hotels, rental cars, and taxis when the employee is away from their tax home on business. The IRS defines “away from home” as being gone long enough that sleep or rest is required, not just a long day. The tax home is the employee’s regular place of business, not necessarily where they live.²

For employees driving their own cars on business, the simplest route is the IRS standard mileage rate, which is 72.5 cents per mile for 2026.⁵ That single figure covers gas, depreciation, insurance, and maintenance. A fixed-and-variable-rate (FAVR) plan can adjust for the employee’s location and actual vehicle costs, but it carries heavier administrative requirements and needs at least five participating employees.

Meals

Business meals are reimbursable, and the employee receives the full amount tax-free. On the company return, only 50% of the meal cost is deductible. The temporary 100% deduction for restaurant meals that applied in 2021 and 2022 has expired.² Meals provided at company-wide events like a holiday party remain 100% deductible.

Entertainment

The Tax Cuts and Jobs Act eliminated the employer deduction for entertainment starting in 2018. You can still reimburse an employee for taking a client to a game, but the company gets no deduction for the tickets. Recreational activities provided to all employees (picnics, holiday parties) survive as deductible, and food purchased separately from the entertainment can still qualify for the 50% meal deduction if it appears on a separate receipt.⁶

Cell Phones and Home Internet

An employer-provided cell phone, or reimbursement of an employee’s personal phone bill, is a nontaxable fringe benefit when the phone is provided primarily for a legitimate business reason rather than as a perk. The same principle applies to home internet reimbursement for remote workers, though you should have the employee substantiate the business-use portion rather than reimburse the whole bill.⁷

Educational Assistance

Under a qualifying educational assistance program, you can reimburse up to $5,250 per employee per year for tuition, fees, books, and supplies without tax on either side. This covers undergraduate and graduate courses and does not require the education to be job-related, but it excludes sports and hobby courses and doesn’t cover tools the employee keeps after the course.⁸

Commuter Benefits

For 2026, you can reimburse up to $340 per month for transit passes and vanpooling and a separate $340 per month for qualified parking, tax-free. The two limits apply independently, so an employee who both parks and rides transit could receive up to $680 per month tax-free.⁹

Per Diem: The Substantiation Shortcut

Instead of collecting receipts for lodging and meals on every trip, you can reimburse at federal per diem rates. Paying at or below the federal rates satisfies the substantiation requirement automatically for amounts, though the employee still has to document trip dates, destination, and business purpose.

For fiscal year 2026 (October 2025 through September 2026), the standard GSA per diem rates are $110 per night for lodging and $68 per day for meals and incidental expenses, with higher meal rates for expensive cities running up to $92.¹⁰

The IRS also offers a simplified high-low method that skips city-by-city lookups. Under that method, high-cost destinations pay $319 per day and everywhere else pays $225, with $86 and $74 of those totals treated as the meal portion subject to the employer’s 50% deduction limit.¹¹ Per diem reduces paperwork for everyone. The trade-off is that it may over-reimburse in cheap cities and under-reimburse in expensive ones, so companies whose employees travel mostly to high-cost areas sometimes prefer tracking actual expenses.

Documentation the IRS Expects

Substantiation is what keeps the plan accountable, so this is where the process either works or breaks. The IRS expects documentary evidence for any single expense of $75 or more. Lodging always requires a receipt regardless of amount. Many companies require receipts for everything, which is safer during an audit.¹²

Each receipt should show the merchant name, date, amount, and what was purchased. A credit card statement alone isn’t enough because it doesn’t identify the purchase. Hotel receipts should break out lodging, meals, and incidental charges separately.¹²

Business meals carry an extra layer. The employee needs to record who attended and the specific business topic. “Client dinner” isn’t enough; “discussed Q3 rollout timeline with Jane Smith, Acme Corp.” is.² The general standard for the business-purpose line on any expense is whether a tax examiner reading the record could understand the reason without asking a follow-up question. “Supplies” invites questions. “Presentation materials for March 12 client pitch” answers them.

Running the Process

Start with a written accountable plan policy. It doesn’t need to be long. It needs to name the reimbursable categories, list the documentation employees have to submit, and state the deadlines for substantiation and return of excess advances. Without a written policy, you are relying on consistent practice to prove your plan qualifies, which is a harder argument at audit.

Most companies handle submissions through an expense management platform where employees upload receipt images, categorize each item, and enter the business purpose. Smaller operations sometimes use a standard spreadsheet with scanned receipts attached by email to a finance contact. Either approach works if the records are complete and retrievable.

Each expense report should pass through two reviews: a manager who confirms the expense fits the actual work, and a finance team member who checks compliance with the accountable plan rules. The two-step process catches both the manager who doesn’t know the tax rules and the accountant who doesn’t know whether the trip actually happened.

Pay reimbursements by direct deposit, either on the regular payroll cycle or as a separate transfer. Whichever route you use, accountable plan reimbursements should show up as a distinct non-taxable line item, not lumped in with wages. If your payroll system can’t separate them, that is worth fixing before the next audit rather than after.

State Reimbursement Laws

Federal law doesn’t require you to reimburse business expenses at all. The IRS rules only govern how the reimbursement is taxed when you do pay one. A number of states, however, have laws requiring reimbursement of necessary work-related expenses, and they vary widely: some cover all reasonable business expenses, others target tools, uniforms, or mileage specifically. Penalties range from wage claims to statutory damages.

If you operate in more than one state, or have remote employees working across state lines, check each state’s labor code. An employee working from home in a state with a mandatory reimbursement law may be entitled to partial reimbursement for internet and phone service regardless of what your internal policy says.

How Long to Keep Records

The IRS requires employers to retain employment tax records for at least four years after the tax is due or paid, whichever is later. Because reimbursements affect employment tax calculations, and a plan later reclassified as non-accountable makes those amounts taxable wages retroactively, your reimbursement records should meet the same four-year floor at minimum.¹³

Six or seven years gives a wider margin, especially since the IRS audit window extends to six years if underreported income exceeds 25% of gross income on a return. Digital storage makes longer retention essentially free, and it’s much cheaper than reconstructing records after the fact.

One 2026 Change Worth Knowing

Starting in 2026, employees who pay business expenses out of pocket and aren’t reimbursed can once again deduct those costs on their personal returns. The Tax Cuts and Jobs Act suspended this deduction from 2018 through 2025. The revived version is a miscellaneous itemized deduction subject to a 2% floor on adjusted gross income, and only itemizers can use it, so for most employees the standard deduction still wins.

This does not change the case for maintaining an accountable plan. Reimbursing through a compliant plan is still far more tax-efficient than leaving the employee to a partial itemized deduction: the employee gets 100% of the money back tax-free, and you deduct the reimbursement as a business expense.

1
Internal Revenue Service. Rev. Rul. 2005-52
2
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
3
Internal Revenue Service. Employment Taxes and the Trust Fund Recovery Penalty (TFRP)
4
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
5
IRS.gov. 2026 Standard Mileage Rates
6
Internal Revenue Service. Tax Cuts and Jobs Act: A Comparison for Businesses
7
Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
8
Office of the Law Revision Counsel. 26 USC 127 – Educational Assistance Programs
9
Internal Revenue Service (IRS). Employer’s Tax Guide to Fringe Benefits
10
Federal Register. Maximum Per Diem Reimbursement Rates for the Continental United States (CONUS)
11
IRS. Special Per Diem Rates
12
Internal Revenue Service. Rev. Rul. 2003-106
13
Internal Revenue Service. How Long Should I Keep Records?