Key takeaways
- Three rules: business connection, substantiation, and return of excess amounts. Miss one and the payments become taxable wages.
- IRS safe harbor: advances up to 30 days before the expense, substantiation within 60 days, excess returned within 120 days. See Publication 463, chapter 6.
- S-corp owners who work in the business are employees, so an accountable plan is how they reimburse themselves tax-free.
- The plan doesn’t have to be written by law, but a written plan is the best evidence that you follow it.
What is an accountable plan?
Any time a business pays an employee back for expenses, the IRS asks one question: is this a reimbursement or extra pay? An accountable plan is how you prove it’s a reimbursement. If the arrangement meets the rules, the money isn’t income to the employee, isn’t subject to payroll tax and isn’t reported as wages on the W-2. The business still deducts the expenses.
This page is a one-page explainer for small business owners, and especially for S-corp owners who pay themselves a salary and want to reimburse their own business costs properly.
Keep the receipts and reports your accountable plan needs, right from your phone, with the Manage Receipt app.
The 3 IRS requirements
The expense was paid or incurred while performing services as an employee.
The employee accounts for the expense within a reasonable time, with receipts and details.
Any advance or allowance beyond the substantiated amount is returned within a reasonable time.
Substantiation means the same details the IRS would want from you directly: amount, date, place and business purpose, with receipts for lodging and for other travel, gift and vehicle costs of $75 or more. See substantiation for the full list.
Accountable vs non-accountable plan
| Accountable plan | Non-accountable plan | |
|---|---|---|
| Meets all three rules? | Yes | No |
| Employee pays income tax on it? | No | Yes |
| Social Security and Medicare? | None | Withheld and matched |
| Reported on W-2? | Not as wages | Included in wages |
| Typical example | Mileage paid at the IRS rate against a log | Flat $400 monthly car allowance, no log |
Reasonable time rules
The IRS doesn’t give one fixed deadline, but it offers two safe harbors that are automatically treated as reasonable:
Fixed date method
- An advance is given no more than 30 days before the expense is paid or incurred.
- The employee substantiates the expense within 60 days after it’s paid or incurred.
- Any excess is returned within 120 days after it’s paid or incurred.
Periodic statement method
- The employer sends each employee a statement, at least quarterly, listing amounts paid beyond what’s been substantiated.
- The employee substantiates or returns those amounts within 120 days of the statement.
Build these deadlines into your expense policy so following the policy automatically keeps you inside the safe harbor.
S-corp owner use case
If you own an S corporation and work in it, you’re an employee of your own company. That creates a trap. If you pay business costs personally and don’t get reimbursed, you can’t deduct them on your own return: under current federal law, unreimbursed employee expenses aren’t deductible for most people. And if the S corp just sends you money without records, it’s extra wages.
An accountable plan solves both problems. Typical costs S-corp owners reimburse this way:
- Business use of a personal car, at the IRS standard mileage rate with a log
- A home office, based on the business-use share of rent, utilities and insurance
- The business share of a personal phone and internet
- Business travel and meals paid on a personal card
Sam owns a one-person design S corp. In Q3, Sam drives 1,200 business miles, and the home office is 10% of a home with $9,000 in quarterly rent and utilities. Sam submits a mileage log and the home costs. The S corp reimburses $912 for mileage (1,200 × $0.76, the rate from July 1, 2026) and $900 for the office. The S corp deducts $1,812, and Sam owes no tax on it.
How to set one up
- Write it downA short plan or board resolution adopting the three rules.
- Set deadlinesUse the 60-day and 120-day safe harbors.
- Define proofReceipts, logs and business purpose for each expense type.
- Reimburse from the businessSeparate from payroll, not as salary.
- Keep the recordsStore reports and receipts with the company’s books.
An accountant can review the wording. The plan only works if it’s followed, so the practical part, collecting receipts and logs on time, matters as much as the document.
The paper trail your plan needs
An accountable plan stands on substantiation. Manage Receipt captures each receipt with its date, vendor and amount, adds the business purpose and bundles everything into dated expense reports. That’s the evidence that keeps reimbursements tax-free if the IRS ever asks.
Explore AI Expense ReportsFrequently asked questions
Does an accountable plan need to be written?
Federal rules don’t strictly require a written document, but you must be able to show the plan meets all three requirements and that you follow it. A short written plan or board resolution, plus consistent records, is the best evidence. Most accountants recommend putting it in writing.
Can an S-corp owner reimburse themselves?
Yes. An S-corp owner who works in the business is an employee, so the company can reimburse business expenses the owner paid personally, such as mileage, a home office or travel, under an accountable plan. The S corp deducts the costs and the owner isn’t taxed on them.
What happens if requirements aren’t met?
The payments are treated as made under a non-accountable plan. They become taxable wages, subject to income tax withholding, Social Security and Medicare, and must be reported on the employee’s W-2. The employee generally can’t deduct the expenses either.
How long do employees have to submit receipts?
Under the IRS fixed-date safe harbor, employees should substantiate expenses within 60 days after paying them and return any excess within 120 days. Many small businesses set a shorter 30-day deadline in their expense policy to stay comfortably within these limits.