How Does Mileage Reimbursement Work? Rates, Taxes & Records

Mileage reimbursement is how an employer pays you back for using your personal vehicle for work. Most employers calculate it by multiplying your business miles by the IRS standard mileage rate, which is 72.5 cents per mile for 2026.¹ The payment stays out of your taxable income when the arrangement meets the IRS rules for an accountable plan and you turn in proper mileage records. Federal law does not force most private employers to reimburse you at all — it sets the tax treatment when they do.

Is Your Employer Required to Pay You

No federal statute obligates a private employer to reimburse business mileage. It is a company policy question in most of the country. A handful of states require employers to cover necessary work-related vehicle expenses, so your state labor law is worth checking if your employer refuses.

One federal backstop applies at the low end of the pay scale. Under the Fair Labor Standards Act’s “kickback” rule, unreimbursed work expenses — including the cost of driving your own car for the job — cannot push your effective pay below the federal minimum wage of $7.25 per hour.² If you earn $7.25 an hour and spend $30 a week on gas driving between job sites, your real hourly wage has dropped below the legal floor and your employer is in violation.³ For anyone earning meaningfully above minimum wage, this protection does not reach.

Which Miles Qualify

Your regular commute between home and your workplace does not count. The IRS treats it as a personal expense, and no employer reimbursement or tax deduction is available for it.⁴

Trips that do qualify include:

Driving from one job site to another during the same workday, even if the sites belong to different employers
Traveling from your regular office to a client, meeting, or other business destination
Trips to a temporary work location outside your tax home area, provided the assignment is realistically expected to last one year or less

Your tax home is the city or general area where your main place of business sits, not necessarily where you live. If you work in more than one location, the IRS looks at where you spend the most time, earn the most income, and conduct the most business activity to identify the main workplace.⁴

There is a helpful exception if you have a qualifying home office as your principal place of business. In that case, driving from home to another location in the same trade or business counts as deductible business mileage, not commuting.⁴

Personal errands, unrelated side trips, and stops with no business purpose do not count. When a trip mixes personal and business stops, only the portion tied to business is reimbursable.

How the Payment Is Calculated

Employers generally use one of two IRS-approved methods.

Standard Mileage Rate

Multiply qualifying business miles by the IRS rate. At 72.5 cents per mile, 500 business miles in a month works out to $362.50. The per-mile rate already accounts for the average fixed and variable costs of running a car — fuel, insurance, depreciation, maintenance, registration — so you do not need to save individual fuel or repair receipts.⁵

Actual Expense Method

Add up every vehicle-related cost for the year — gas, oil, repairs, tires, insurance, registration, depreciation — then multiply by the percentage of your driving that was business. A car that costs $8,000 a year to run, driven 60% for business, produces a reimbursable amount of $4,800.⁶ This method tends to pay more when a vehicle has high operating costs or fuel is expensive locally, but it takes considerably more recordkeeping.

Under either method, business-related parking fees and tolls are separately reimbursable. They are not built into the standard rate.⁶

FAVR Allowances

Some employers use a third approach, a Fixed and Variable Rate (FAVR) allowance. It combines a periodic fixed payment for ownership costs (depreciation, insurance, registration) with a variable per-mile payment for operating costs (fuel, tires, maintenance). FAVR plans can more closely match actual costs across regions and driving patterns, but the IRS sets specific structural requirements the employer must follow for the payments to remain tax-free.

Is the Reimbursement Taxable

Whether the money shows up as taxable wages depends entirely on whether your employer’s plan qualifies as an “accountable plan” under federal tax rules.

An accountable plan meets three conditions:⁷

Business connection: the expenses are work-related and incurred while doing your job
Substantiation: you give your employer adequate records within a reasonable time
Return of excess: if an advance or reimbursement exceeds your substantiated expenses, you return the difference

When all three are met, the payment is excluded from your gross income, does not appear as wages on your W-2, and is not subject to income tax withholding or payroll taxes.⁸

Miss any one of the conditions and the arrangement becomes a non-accountable plan. A flat monthly car allowance paid without any mileage log is the classic example. The full payment is treated as taxable wages, subject to withholding and payroll taxes.⁷ And even under an otherwise accountable plan, any amount paid above the IRS standard rate is taxable as ordinary income.

Records You Need to Keep

Regardless of the calculation method, the IRS expects four elements for each business trip:⁴

Amount: miles driven, or the cost of each item under the actual expense method
Date of the trip
Destination, identified by city, town, or similar description
Business purpose, such as “meeting with client at their office” or “delivered equipment to job site”

Records made at or near the time of the trip carry far more weight than a spreadsheet reconstructed at year-end from memory.⁴ A same-day log entry stands up in an audit; a retroactive one often does not.

GPS-based tracking apps can automate the distance and route data, but they do not capture the business purpose. You still need to note why each trip was work-related, either inside the app or in a companion log. Electronic records are fine as long as they contain the required elements. Paper is not required.

What if Your Employer Does Not Reimburse You

If you are a W-2 employee and your employer will not reimburse business driving, you cannot deduct those costs on your federal return. Before 2018, employees could claim unreimbursed job expenses as a miscellaneous itemized deduction. The Tax Cuts and Jobs Act suspended that deduction, and later legislation made the suspension permanent.⁹ There is currently no federal mechanism for W-2 workers to recover unreimbursed mileage at tax time.

That gap is why the reimbursement conversation matters. An employer asking you to drive your personal car has a strong practical reason to pay for it: the payments are deductible for the business and tax-free to you when the plan is accountable. If you are self-employed, the reimbursement framework does not apply to you at all — you deduct qualifying business mileage directly on Schedule C (or Schedule F for farming) using either the standard rate or the actual expense method, subject to separate IRS rules on which method you can choose.⁶

1
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
2
eCFR. 29 CFR 531.35 – Free and Clear Payment; Kickbacks
3
U.S. Department of Labor. State Minimum Wage Laws
4
Internal Revenue Service. Publication 463 (2024), Travel, Gift, and Car Expenses
5
Internal Revenue Service. 2026 Standard Mileage Rates Notice 2026-10
6
Internal Revenue Service. Topic No. 510, Business Use of Car
7
Office of the Law Revision Counsel. 26 USC 62 – Adjusted Gross Income Defined
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eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
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Internal Revenue Service. General Instructions for Forms W-2 and W-3