Employee mileage reimbursement rules: what is taxable
Employee mileage reimbursement is not taxable income when your employer pays it under an accountable plan, at or below the IRS rate (72.5 cents a mile through June 30, 2026, and 76 cents from July 1), for business miles you report on time. A flat car allowance with no mileage report, or the part of a rate above the IRS rate, is taxed as wages.
On this page (9 sections)
This is not tax or legal advice. The tax rules come from IRS Publication 463, chapter 6, and Publication 15, section 5. Your employer’s written policy decides what it pays.
Do employers have to reimburse mileage?
Under federal law, generally no. No federal law sets a mileage rate for private employers. The federal wage law (the Fair Labor Standards Act) steps in only when your unpaid car costs would push your pay below the minimum wage or the overtime you are owed. The U.S. Department of Labor says the reimbursement then has to reasonably match your costs, and the IRS rate is one option, not a requirement.
Some states go further. California, Illinois, Iowa, and a few others require employers to pay for necessary work expenses, including driving. See mileage reimbursement laws by state.
Three ways employers pay for driving
| Method | How it works | Taxable to the employee? |
|---|---|---|
| Cents per mile | You report business miles; the employer pays a rate per mile, often the IRS rate | No, up to the IRS rate, under an accountable plan. Any amount above the rate is wages. |
| Flat car allowance | A fixed amount each month, with no mileage report | Yes: it is paid under a nonaccountable plan, so all of it is wages |
| FAVR (fixed and variable rate) | A fixed monthly amount for costs like insurance and depreciation, plus a rate per mile for gas and upkeep, under IRS rules | No, if the plan meets the rules in Rev. Proc. 2019-46. For 2026, the car’s cost can be no more than $61,700. |
Sources: IRS Publication 463, chapter 6; IRS Publication 15, section 5; IRS Notice 2026-10, sections 2 and 5.
The accountable plan: three rules
A reimbursement plan is “accountable” when it meets all three IRS rules:
- Business connection: the expense is for business driving you did as an employee. Commuting doesn’t qualify.
- Adequate accounting: you report the miles to your employer within a reasonable period, with the date, miles, destination, and business purpose of each trip.
- Return of any excess: you pay back any advance or allowance above what you accounted for, within a reasonable period.
Publication 463 gives safe time limits for “a reasonable period”:
| Step | Time limit |
|---|---|
| Advance paid before the expense | Within 30 days before you have the expense |
| You report the expense | Within 60 days after you paid or incurred it |
| You return any excess | Within 120 days after you paid or incurred the expense |
| Or: employer sends a statement at least quarterly | You report or return the amount within 120 days of the statement |
Sources: IRS Publication 463, chapter 6, “Reasonable period of time”; Treasury Regulation 1.62-2(g).
Is mileage reimbursement taxable?
It depends on the plan, the rate, and the miles:
- Accountable plan, at or below the IRS rate: not income. It isn’t in box 1 of your W-2, and no tax is withheld.
- Accountable plan, above the IRS rate: the amount up to the IRS rate is shown in box 12 of your W-2 with code L and isn’t taxed. The excess is in box 1 as wages.
- Nonaccountable plan (no mileage report, or you keep any excess): all of it is wages, subject to income tax withholding, Social Security, and Medicare.
- Commuting miles: always taxable wages, even at or below the IRS rate, because commuting isn’t a business expense. See commuting miles.
Any part of a reimbursement that you don’t account for or return in time is treated as paid under a nonaccountable plan.
Paying more than the IRS rate
Example: an employer pays 80 cents a mile, and you report 500 business miles driven in September 2026, when the IRS rate is 76 cents.
| Part | Math | Amount | On the W-2 |
|---|---|---|---|
| Up to the IRS rate | 500 × $0.76 | $380.00 | Box 12, code L; not taxed |
| Above the IRS rate | 500 × $0.04 | $20.00 | Box 1, taxed as wages |
| Total paid | 500 × $0.80 | $400.00 | — |
Paying less than the IRS rate is allowed under federal tax law, and under an accountable plan none of it is taxable. Some state laws may still require the employer to cover your actual costs. The mileage reimbursement calculator works out the amount at the IRS rate for each date or at your company’s rate.
What an employee should turn in
- A mileage log or expense report with the date, start and end points, business purpose, and miles of each trip.
- Commuting miles left out. Many employers also subtract your normal commute from trips that start or end at home. That is a common company policy, not an IRS rule: if you have a regular workplace, the IRS treats a trip from home to a temporary work location as business at any distance (see commuting miles). Follow your employer’s written policy.
- Parking and toll receipts, if your employer pays them.
- Your signature, and the period the report covers.
Our free mileage reimbursement form has these fields, and the mileage log keeps the trip-by-trip record behind it. Submit at least monthly so you stay inside the 60-day limit.
Federal employees
Federal employees on official travel are paid under the Federal Travel Regulation, at the GSA rate for privately owned vehicles. See the GSA mileage rate.
FAQ
Is mileage reimbursement considered income?
Not when it is paid under an accountable plan at or below the IRS rate for business miles you reported on time. A flat allowance with no mileage report, the part of any rate above the IRS rate, and payment for commuting are income.
Do employers have to pay the IRS mileage rate?
No. The IRS rate is the most an employer can pay per mile without the excess being taxable, not a minimum. A state law, a union contract, or the minimum wage rules may still require enough to cover your costs.
Is a car allowance taxable?
A flat car allowance with no mileage report is taxable wages. If you must report your business miles and return any amount above the IRS rate for those miles, it can be paid tax-free under an accountable plan.
Can I deduct the miles my employer didn’t pay for?
Generally not on a federal return. The deduction for unreimbursed employee expenses is suspended for 2018 and later, and the 2025 tax law made that permanent. A few groups are exceptions; see the mileage deduction guide.
Does my employer have to reimburse my commute?
No federal rule requires it. If an employer does pay for commuting, the payment is taxable wages.
Sources
- IRS, Publication 463, chapter 6, How To Report (accountable plans, reasonable period of time, Table 6-1) (checked November 12, 2026): irs.gov
- IRS, Publication 15 (2026), Employer’s Tax Guide, section 5 (accountable and nonaccountable plans) (checked November 12, 2026): irs.gov
- Treasury Regulation 26 CFR 1.62-2 (reimbursement arrangements) (checked November 12, 2026): ecfr.gov
- IRS, Notice 2026-10 (2026 rates; FAVR maximum vehicle cost) (checked November 12, 2026): irs.gov (PDF)
- IRS, Announcement 2026-11 (rates from July 1, 2026) (checked November 12, 2026): irs.gov
- IRS, Publication 5137, Fringe Benefit Guide (commuting reimbursements) (checked November 12, 2026): irs.gov (PDF)
- U.S. Department of Labor, Opinion letter FLSA2020-12 (reimbursing vehicle expenses; the IRS rate is optional) (checked November 12, 2026): dol.gov (PDF)
- 29 CFR 531.35 (wages paid “free and clear”) (checked November 12, 2026): ecfr.gov