Mileage Reimbursement for Employees | 2026 Guide

If you drive your personal car for work, mileage reimbursement for employees is how you recover those costs. Whether you visit client sites, run errands between offices, or travel to training events, every business mile adds up fast. Understanding how reimbursement works protects your wallet and keeps your employer compliant with IRS rules.

This guide breaks down the employee mileage reimbursement rules for 2026, what employers are required to do, and the easiest way to track and submit your miles.

How Employee Mileage Reimbursement Works

Mileage reimbursement compensates you for using your personal vehicle on business trips. Your employer pays a set rate per mile driven, covering fuel, maintenance, insurance, and depreciation rolled into one simple number.

Most employers use the IRS standard mileage rate as their benchmark. For 2026, that rate is $0.725 per mile for business driving. So if you drive 500 business miles in a month, your reimbursement would be $362.50 before taxes come into the picture.

Here is how the math typically works. Your employer sets a per-mile rate (often the IRS rate), you log each business trip, and submit your mileage report on a regular schedule. The employer verifies the report and includes the reimbursement in your next paycheck or as a separate payment.

Not every mile counts, though. Your regular commute from home to your primary workplace is considered personal mileage and is never reimbursable. Trips from your office to a client site, a secondary work location, or a temporary project site do qualify.

IRS Rules Employers Must Follow

The IRS does not require employers to reimburse mileage. However, if an employer chooses to reimburse (and wants it to be tax-free), they must follow specific rules through what is called an accountable plan.

An accountable plan has three strict requirements:

1. Business connection — Every reimbursed expense must have a clear business purpose.
2. Adequate accounting — Employees must submit documentation (a mileage log) within 60 days of the expense.
3. Return of excess — Any advance payment that exceeds actual expenses must be returned within 120 days.

When employers skip these rules, reimbursements fall under a “nonaccountable plan.” That means every dollar reimbursed gets reported as taxable wages on the employee’s W-2 — and both employer and employee pay extra taxes on it.

For a deeper dive on IRS requirements, check out our IRS mileage reimbursement guide.

What Employees Should Know About Mileage Reimbursement

As a W-2 employee, you cannot deduct unreimbursed business mileage on your federal tax return. The Tax Cuts and Jobs Act (TCJA) eliminated that deduction for employees through 2025, and Congress extended the provision into 2026. This makes your employer’s reimbursement policy the only way to recover driving costs.

Here is what that means in practice. If your employer does not reimburse mileage, you absorb the full cost of business driving. At $0.725 per mile, an employee who drives 10,000 business miles a year leaves $7,250 on the table.

If your employer reimburses above the IRS rate, the excess is taxable. For example, if your company pays $0.80 per mile, the extra $0.075 per mile shows up as taxable income on your W-2.

Always ask your HR department whether the company uses an accountable plan. That single detail determines whether your reimbursement is tax-free or taxable.

State Laws That Require Mileage Reimbursement

Federal law does not mandate employer mileage reimbursement, but several states do. If you work in one of these states, your employer is legally required to reimburse necessary business expenses, including mileage.

States with expense reimbursement laws include:

• California — Labor Code Section 2802 requires employers to reimburse all necessary business expenses.
• Illinois — The Illinois Wage Payment and Collection Act covers employee expense reimbursement.
• Massachusetts — Employers must reimburse employees for all required business travel costs.
• New York — Reimbursement is required when business expenses bring an employee’s effective wage below minimum wage.
• Iowa, Montana, New Hampshire, South Dakota — Each has some form of employee expense reimbursement provision.

If your employer is not reimbursing your business mileage and you work in one of these states, you may have legal recourse. Review the full breakdown in our state mileage laws guide.

Even in states without a mandate, many employers offer mileage reimbursement as a benefit to attract and retain talent. It costs the company less than raising salaries by the same amount because accountable-plan reimbursements are exempt from payroll taxes.

How to Track and Submit Mileage as an Employee

Accurate mileage tracking is the foundation of every reimbursement. Without a proper log, your employer cannot verify your trips, and the IRS can disallow the tax-free treatment during an audit.

Your mileage log must include four pieces of information for every trip:

• Date of the trip
• Starting and ending location
• Total miles driven
• Business purpose of the trip

Recording odometer readings at the start and end of each trip adds an extra layer of proof, though it is not strictly required.

Pen-and-paper logs work but are easy to forget and hard to organize. Spreadsheets improve things slightly. The most reliable approach is a mileage tracking app like Tripbook that automatically records your trips using GPS, so you never miss a mile or forget a business purpose.

With Tripbook, you can classify trips as business or personal with a single swipe and export IRS-compliant reports in PDF, CSV, or XLS format. That makes submitting your mileage report to your employer as simple as sharing a file.

Here are a few tips to keep your mileage records airtight:

• Log trips the same day they happen. The IRS gives more weight to records created at or near the time of the expense.
• Separate business and personal trips clearly. Mixing the two is the fastest way to trigger questions during an audit.
• Submit reports on schedule. Most employer mileage reimbursement policies require monthly or bi-weekly submissions. Late reports can delay your payment or disqualify reimbursement under the accountable plan’s 60-day rule.
• Keep backup copies. Store digital copies of every mileage report you submit, in case you need them later.

Get Every Mile You Have Earned

Mileage reimbursement for employees is straightforward once you understand the rules. Your employer should use an accountable plan, you should track every business mile, and you should submit reports on time. If your state requires reimbursement, know your rights.

The biggest risk is not the rules themselves — it is forgetting to log a trip. Automated tracking eliminates that risk entirely.

Download Tripbook and start capturing every business mile automatically so you never leave reimbursement money on the table.