Mileage reimbursement is money your employer pays you for using your personal vehicle to do your job. For 2026, the IRS standard mileage rate is 72.5 cents per mile, and that figure is the benchmark most employers use.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents Whether the money is taxable, whether your employer is required to pay it at all, and how much you can actually claim depends on how the plan is structured and where you work.
What the Rate Is Meant to Cover
People often think of mileage reimbursement as gas money. It is meant to cover a lot more. The IRS rate is calculated to offset variable costs like oil, tires, and routine maintenance, plus fixed costs like insurance premiums, registration, depreciation, and license taxes. Drive 100 business miles and get reimbursed at 72.5 cents per mile, and the $72.50 you receive is meant to absorb all of those combined.
The same rate applies to gasoline, diesel, hybrid, and fully electric vehicles. If you drive an EV, your employer can reimburse you at 72.5 cents per mile, and charging costs are treated the way gas would be under the standard rate.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
One boundary matters: commuting does not count. The drive between your home and your regular workplace is a personal expense regardless of the distance, even if you take business calls on the way. Reimbursable mileage only starts when the travel directly serves a business purpose, like visiting a client, driving between job sites, or running an errand your employer asked you to handle.2Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
The 2026 IRS Standard Mileage Rates
Each year the IRS publishes standard mileage rates based on an independent study of what it costs to own and operate a car. For 2026:3Internal Revenue Service. Notice 2026-10, 2026 Standard Mileage Rates
- Business use: 72.5 cents per mile
- Medical or military moving: 20.5 cents per mile
- Charitable service: 14 cents per mile
Your employer is not required to use the business rate exactly. Some pay more, some pay less, some use a different calculation entirely. The IRS number still matters because it sets the line between tax-free reimbursement and taxable income. Reimbursements at or below 72.5 cents per mile are generally excluded from wages when the plan qualifies as accountable. Amounts above that get different treatment.
The charitable rate is set by statute and rarely changes. The medical and moving rate is lower because it only reflects variable operating costs, not the full fixed-plus-variable calculation used for business travel.4Internal Revenue Service. Standard Mileage Rates
Is Your Reimbursement Taxable?
Whether mileage reimbursement shows up as taxable income on your W-2 depends almost entirely on how your employer’s plan is structured. The IRS draws a sharp line between accountable and nonaccountable plans, and the difference can cost you real money.
An accountable plan has to meet three requirements:5eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
- Business connection. The reimbursement is for expenses you actually incurred doing your job.
- Substantiation. You provide adequate documentation, such as a mileage log with dates, destinations, and business purposes.
- Return of excess. If you received more than your documented expenses, you return the difference within a reasonable time.
Meet all three and the reimbursement is tax-free. It doesn’t appear as income on your W-2, and neither you nor your employer owes payroll taxes on it. Most large employers run accountable plans because it saves them on their share of employment taxes too.
Miss any one of the three and the IRS treats the entire payment as nonaccountable. Every dollar gets added to gross income, reported as wages, and subjected to income tax withholding plus FICA and FUTA taxes.5eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements Sloppy recordkeeping is where this trips people up. Even if your employer intends to run an accountable plan, your specific reimbursement can be reclassified as taxable if you don’t substantiate the expenses or return overpayments.
What Happens When Reimbursement Exceeds the IRS Rate
Some employers pay more than the IRS standard. If yours pays 85 cents per mile under an accountable plan, the first 72.5 cents is tax-free and the excess 12.5 cents per mile is reported as taxable wages in Box 1 of your W-2. The tax-free portion shows up separately in Box 12 under Code L.2Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
Don’t assume the whole reimbursement check is free and clear. If your employer pays above the standard rate, check your W-2 at year-end. Box 1 will be higher than your base salary by the excess, and you owe income tax on that difference like any other wages.
Is Your Employer Required to Reimburse You?
No federal law requires an employer to reimburse business mileage. The IRS standard rate is a tax benchmark, not a mandate. Many employers reimburse voluntarily because it helps with recruiting and retention, but the decision is theirs under federal law.
There is one federal floor. Under the Fair Labor Standards Act, your employer cannot let unreimbursed work expenses drag your effective pay below minimum wage. If you earn close to minimum wage and drive extensively for work, the cost of gas, wear, and maintenance can eat into your hourly rate enough to create an FLSA violation. The Department of Labor has confirmed that required use of a personal vehicle counts toward this calculation.6U.S. Department of Labor. WHD Opinion Letter FLSA2020-12
A handful of states go further and require reimbursement for necessary business expenses, including mileage. California, Illinois, and Massachusetts are the most notable. In those states your employer likely cannot skip mileage reimbursement even if it wants to. Specific rules vary, and some states allow rates other than the IRS standard as long as actual costs are covered.
Records You Need to Keep
The IRS requires substantiation for any travel expense you claim or get reimbursed for. Under Section 274(d) of the tax code, adequate records show four things: the amount of the expense, the time and place of travel, the business purpose, and the business relationship of anyone you met with.7Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
In practice that means a mileage log detailed enough that an auditor could verify it. Each entry should record the date, the destination with enough specificity to check the distance, the business purpose (not “client meeting” but “met with Sarah Chen at Acme Corp to review Q2 contract”), and the mileage itself, whether from odometer readings or GPS.
Timeliness matters. A log kept at or near the time of each trip carries more weight than a reconstruction from memory weeks later. You don’t have to record every trip the same day, but a weekly log that captures all business use for the week is considered timely.2Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
Most employees now use smartphone apps that track mileage automatically via GPS. Those tools create the contemporaneous, detailed records the IRS wants without the friction of manual logging. If your employer provides a standard expense form or portal, use it consistently. Gaps in your records are what create problems during audits or internal reviews.
Deducting Unreimbursed Mileage in 2026
If your employer doesn’t reimburse business mileage at all, or reimburses less than your actual costs, 2026 is a turning point. The Tax Cuts and Jobs Act eliminated the deduction for unreimbursed employee business expenses for tax years 2018 through 2025. That suspension expires on January 1, 2026, which means you can once again deduct unreimbursed business mileage as a miscellaneous itemized deduction on your personal return.8Office of the Law Revision Counsel. 26 USC 67 – 2-Percent Floor on Miscellaneous Itemized Deductions
Two conditions apply. The deduction is subject to a 2% floor, so you only deduct the portion of your total miscellaneous itemized deductions that exceeds 2% of your adjusted gross income. And you have to itemize rather than take the standard deduction, which only pays off if your itemized total is higher than the standard deduction for your filing status.
During the TCJA suspension, a narrow group could still claim unreimbursed expenses on Form 2106: Armed Forces reservists, qualified performing artists, fee-basis state and local government officials, and employees with disability-related work expenses. Starting in 2026 the deduction opens back up to all employees who itemize, though those special categories keep their above-the-line treatment.9Internal Revenue Service. 2025 Instructions for Form 2106 – Employee Business Expenses
Check Your Auto Insurance
Mileage reimbursement covers operating costs. It does not solve insurance. Most personal auto policies exclude coverage when you use your vehicle as a livery or delivery service. If you regularly transport goods or passengers for compensation beyond your normal job duties, your personal policy may deny a claim after an accident. That matters especially for delivery work or client transportation.
Standard personal policies generally do cover driving your own car for typical business errands like visiting clients or traveling between offices. The exclusions target commercial-scale use. Still, review your policy’s business-use provisions if your employer requires heavy driving. Some employers carry non-owned auto liability coverage that fills this gap; not all do. If yours does not, a business-use endorsement on your personal policy is usually inexpensive and closes the exposure.