Indiana mileage reimbursement law starts with a blunt fact: no state statute requires private employers to reimburse employees for miles driven in a personal vehicle. The rules that actually govern the paycheck come from federal law. The Fair Labor Standards Act won’t let unreimbursed work expenses drop your effective pay below the $7.25 federal minimum wage, and the IRS standard mileage rate (72.5 cents per mile for 2026) shapes how most reimbursement programs are built and taxed. Between “no state mandate” and “real federal consequences” is where most of the confusion lives.
No State Requirement, but a Federal Wage Floor
Indiana’s labor statutes contain no provision requiring private employers to pay for mileage or other vehicle costs. If your employer offers nothing, Indiana law alone won’t force the issue.
Federal law fills part of that gap. The FLSA’s “kick-back” rule says that when an employer requires an employee to cover business expenses out of pocket, those costs cannot push earnings below the minimum wage or cut into required overtime pay. The Department of Labor treats employer-required vehicle use the same way it treats required uniforms or tools: if you have to pay for it to do the job, the cost can’t eat into your minimum wage floor.
The math matters. If you earn $10 an hour and drive 200 miles in a week for work, spending roughly $60 on gas and wear, your effective hourly wage drops. If that drop takes any hour worked that week below $7.25, your employer has a wage violation. For employees earning well above minimum wage, unreimbursed mileage may never trigger this rule. For lower-wage workers who drive heavily, it can matter a great deal.
The 2026 IRS Standard Mileage Rate
The IRS sets an optional standard mileage rate each year, based on an independent study of what it costs to operate a car (fuel, depreciation, insurance, maintenance, repairs). For 2026, the business rate is 72.5 cents per mile, up from 70 cents in 2025.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents
No law requires an employer to use this rate. Some pay more, many pay less, some pay nothing. The IRS rate is the common benchmark because it carries a tax advantage: reimbursements at or below the standard rate are not taxable income to the employee and are fully deductible for the employer, provided the payment runs through an accountable plan.
For comparison, Indiana state government employees are reimbursed at $0.49 per mile, a figure unchanged since June 2022.2Indiana Department of Administration. Travel Reimbursement Rates That is a policy choice by the state, not a legal ceiling. Private employers are free to set any rate they want.
How Your Reimbursement Gets Taxed
Whether the money shows up on your W-2 as taxable wages depends almost entirely on whether your employer runs what the IRS calls an accountable plan or a non-accountable plan.
Accountable Plans
An accountable plan has to satisfy three requirements:3Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
- Business connection. The expense has to be incurred while performing services as an employee, and the reimbursement can’t be a substitute for wages the employer would have paid anyway.
- Substantiation. You have to document each expense to your employer within a reasonable time, including date, destination, miles driven, and business purpose.
- Return of excess. If your employer advances more than the substantiated amount, you have to return the difference within a reasonable time.
When all three conditions are met and the rate paid does not exceed the IRS standard rate, the reimbursement is excluded from your gross income entirely. It doesn’t appear in Box 1 of your W-2, and neither you nor your employer owes payroll taxes on it.
Non-Accountable Plans
Miss any of the three requirements and the IRS treats the entire reimbursement as wages. That means federal income tax withholding, Social Security, Medicare, and federal unemployment tax all apply.3Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide Flat monthly car allowances almost always land here, because they are paid whether or not the employee drives any business miles, which fails both substantiation and return-of-excess.
The difference is real money. A $500 monthly non-accountable allowance might net $350 to $375 after taxes; the same $500 through an accountable plan arrives untaxed.
Reimbursements That Exceed the IRS Rate
If your employer pays more than 72.5 cents per mile in 2026, the portion up to the standard rate stays non-taxable under an accountable plan, but the excess is treated as taxable wages. The employer must include the excess in W-2 income and withhold on it.3Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
Indiana imposes no separate state-level tax on mileage reimbursements. The state follows federal treatment, so an amount excluded from federal gross income is also excluded from Indiana adjusted gross income.
Which Trips Count as Business Miles
Reimbursable business mileage generally includes trips from a regular workplace to a client site, travel between job locations during the workday, errands to pick up supplies or drop off documents, and drives to conferences or training. Your normal commute (home to your regular workplace) is not business mileage.
The line gets harder when there is no fixed office. If you work from home and drive to a client, that trip is business travel, because your home is your principal place of business. If you report to an office three days a week and occasionally drive to a client from home, the client trip counts as business mileage, but the drive to the office is still a commute. Written employer policies usually spell this out, because ambiguity is where most disputes come from.
Records the IRS Expects You to Keep
To claim mileage under the standard rate, the IRS wants specific documentation for every business trip. Each entry needs four elements:4Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
- Date of the trip.
- Destination (city, town, or area).
- Mileage, either from odometer readings at the start and end or an equivalent GPS record.
- Business purpose (client meeting, supply run, job site visit).
Electronic records kept on a computer or phone app count. Many employers now use GPS-based tracking apps that log start and end points automatically. Whatever the format, entries have to be made at or near the time of the trip. Reconstructing a month of driving from memory at quarter-end is exactly what the IRS rejects in an audit.
It also helps to keep total annual mileage for the vehicle, splitting business and personal miles, so the business-use percentage is clear if anyone asks.
If Your Employer Won’t Pay
When an employer’s failure to reimburse mileage drops effective wages below the minimum wage, you have options.
The Indiana Department of Labor accepts wage claims and tries to resolve them between employer and employee. Once a claim is accepted, the department contacts the employer, who has two weeks to pay or dispute. If the employer doesn’t respond, a final notice gives another week. If the matter stays unresolved, the department sends the file back to the employee with a recommendation to consult an attorney or go to court. The process can run up to 90 days.5Indiana Department of Labor. Application for Wage Claim Instructions
Watch the retaliation gap. Indiana law provides no job protection if you are fired for filing a wage claim against your current employer.5Indiana Department of Labor. Application for Wage Claim Instructions Federal law helps. Section 15(a)(3) of the FLSA prohibits an employer from discharging or discriminating against an employee who files a complaint or cooperates in an investigation under the Act. The protection covers oral and written complaints, and most courts have held internal complaints to an employer are also covered.6U.S. Department of Labor. Fact Sheet 77A: Prohibiting Retaliation Under the Fair Labor Standards Act (FLSA) A worker who is retaliated against can file with the Department of Labor’s Wage and Hour Division or bring a private lawsuit seeking reinstatement, back pay, and liquidated damages.
There is a practical catch. If the mileage dispute doesn’t push your pay below minimum wage, the FLSA may not apply at all, which means the federal anti-retaliation protection may not be available either. Employees in that spot should talk to an employment attorney before filing anything.