Employee Mileage Reimbursement Law by State (2026)

No federal law requires a private employer to reimburse you for business mileage. Three states impose a broad, enforceable duty: California, Illinois, and Massachusetts. Two more, New Hampshire and North Dakota, have general indemnification statutes that reach work expenses. Everywhere else the duty is narrow, conditional, or absent entirely.

Sources: California Labor Code § 2802; 820 ILCS 115/9.5; 454 CMR 27.04; NH RSA 275:57; NDCC § 34-02-01. Statutory text verified August 2026.

Why this matters more than it used to

Until 2018 a W-2 employee who was not reimbursed could deduct the shortfall as a miscellaneous itemized deduction. That deduction is gone, and it remains gone for the 2026 tax year. For a W-2 driver, employer reimbursement is now the only route to recovering vehicle costs. State law is what decides whether you have a claim.

The amounts involved are substantial. An employee driving 8,000 unreimbursed business miles is out roughly $5,940 at the 2026 IRS rates (72.5 cents per mile through June 30, then 76 cents), with the miles split evenly across the change. In a mandate state that is a recoverable sum. In a non-mandate state it is simply a cost you absorbed.

The three broad-duty states

California

Labor Code § 2802(a) requires that an employer "indemnify his or her employee for all necessary expenditures or losses incurred by the employee in direct consequence of the discharge of his or her duties." Subsection (c) defines those necessary expenditures to include "all reasonable costs, including, but not limited to, attorney's fees incurred by the employee enforcing the rights granted by this section."

The attorney's-fees provision is what gives § 2802 real teeth: it makes small individual claims economically viable to bring, and it is a significant part of why California mileage cases are so often filed as class actions. Full California guide.

Illinois

820 ILCS 115/9.5, added to the Wage Payment and Collection Act effective January 1, 2019, requires reimbursement of necessary expenditures incurred within the scope of employment that primarily benefit the employer. Two details in the statute matter to drivers and are widely missed:

• A 30-day filing window. The statute requires that "an employee shall submit any necessary expenditure with appropriate supporting documentation within 30 calendar days after incurring the expense." Miss it and the claim can be lost regardless of how many miles you drove.
• A written policy can cap the amount. Where an employer's written reimbursement policy sets specifications or guidelines, the employer "is not liable under this Section for the portion of the expenditure amount that exceeds" them. A policy offering no reimbursement at all is not permitted, but a policy paying below the IRS rate can be.

That 30-day clock is the single most actionable fact on this page. Illinois guide.

Massachusetts

The duty sits in the minimum wage regulations rather than a standalone expense statute. Under 454 CMR 27.04, an employee who regularly works at a fixed location but is required to report elsewhere "shall be compensated for all travel time in excess of his or her ordinary travel time between home and work and shall be reimbursed for associated transportation expenses." The regulation adds that an employee directed to travel from one place to another during the work day "shall be compensated for all travel time and associated transportation expenses."

Note what the regulation does and does not cover: ordinary home-to-work travel is excluded, matching the federal commuting rule, but travel between job sites during the day is squarely covered. Massachusetts guide.

Two states with general indemnification statutes

New Hampshire and North Dakota do not have mileage-specific rules, but both have older statutes broad enough to reach necessary work expenses.

• New Hampshire, RSA 275:57. Expenses the employee incurs at the employer's request must be "reimbursed for the payment of the expenses within 30 days of the presentation by the employee of proof of payment." Note the direction of this 30-day clock: it binds the employer's payment, not the employee's filing. New Hampshire guide.
• North Dakota, NDCC § 34-02-01. Titled "Employer must indemnify employee for losses and expenses - Exception." The exception language means the scope is narrower than California's, and how it applies to routine mileage is less settled. North Dakota guide.

States where the duty is conditional

A larger group of states, including New York, Washington, Montana, and Iowa, reach mileage only indirectly. The usual mechanism is the minimum wage floor: if absorbing your own vehicle costs pushes your effective hourly pay below the state minimum, the shortfall becomes a wage violation. That is a real claim, but it is available only to lower-wage employees, and a well-paid driver with heavy unreimbursed mileage will typically fall outside it.

Because these depend on state wage-act interpretation rather than a clear expense statute, the answer turns on facts and on current agency guidance. Check the state guide for the specifics: New York, Washington, Montana, Iowa.

Everywhere else

In the remaining states reimbursement is a matter of employer policy. Most large employers pay it anyway, because reimbursement under an accountable plan is tax-free to the employee and deductible to the company, which makes it cheaper than the equivalent raise. If your employer does not reimburse, you can ask, and the tax argument is the one most likely to work, but you have no statutory claim.

Does my employer have to pay the full IRS rate?

No. No state statute names a per-mile figure. The IRS rate is a tax ceiling, not a wage floor: it caps what can be paid tax-free. An employer may reimburse below it, and in Illinois a written policy may do so explicitly. Reimbursement above the IRS rate is permitted, but the excess becomes taxable wages.

Which state's law applies if I work across state lines?

Generally the law of the state where you perform the work, not where the employer is headquartered. A remote employee working in California for an out-of-state company is usually covered by § 2802. This is fact-specific and worth confirming with an employment lawyer in your state.

What should I do if reimbursement is denied?

1. Keep a contemporaneous mileage log with date, distance, destination, and business purpose for every trip. Without it there is no claim to bring.
2. Submit on your employer's required schedule, and in Illinois within 30 calendar days of incurring the expense.
3. If it is denied or underpaid, file a wage claim with your state labor agency before filing suit. Most states require or strongly prefer that step first.

A wage claim is only as strong as the log behind it. TruMile records every business mile automatically, with the date, distance, and purpose a claim needs. Try TruMile →

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