Is a Mileage Reimbursement Taxable?

Written by mBurse Team Member Jun 15, 2020 7:00:00 AM

When an employee drives a personal vehicle as part of their job, the company typically reimburses the driver for the cost of the business use of the vehicle. Many employers pay a cents-per-mile rate because it is simple to calculate. But it is important to know the IRS rules about taxation of vehicle reimbursements.

Is a mileage reimbursement taxable income?

The answer is, it depends. Typically, the reimbursement stays non-taxable as long as the mileage rate used for reimbursement does not exceed the IRS standard business rate (.575/mile for 2020). But this assumes that other rules are being followed to make the reimbursement part of an accountable plan.

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For the vehicle reimbursement to be accountable and non-taxed, you have to demonstrate business use of the mileage being reimbursed. This involves keeping an up-to-date record of each business trip – date, destination, mileage. In the past mileage logs were often paper records, but now more  people use mileage tracking apps designed to automate this process.

If the employer pays a mileage rate that exceeds the 2020 IRS business rate, then the amount over 57.5 cents per mile (multiplied by the mileage) will be considered taxable income. Similarly, if the company uses the IRS rate or less but does not keep appropriate records to substantiate business use of the vehicle for the reported mileage, then the reimbursement should be taxed.

What vehicle expenses does a mileage reimbursement cover?

The business mileage rate published each year by the IRS is based on the average costs of owning and operating a vehicle in the U.S. for the previous year. Because these costs are averaged from across the country, they apply more to some drivers than others, which can create some problems when it comes to using the IRS mileage rate as a reimbursement tool. (It was actually intended to just be used as a tax deduction tool for individuals.)

A reimbursement for an employee's use of a personal vehicle should cover the business portion of the following expenses (i.e. whatever percentage of the vehicle use is for work):

Vehicle Ownership Costs

  • Auto insurance
  • Depreciation (higher in newer cars; keep in mind if employer requires a newer car)
  • Taxes, license, registration

Vehicle Operation Costs

  • Fuel
  • Oil
  • Maintenance
  • Tires

Looking at this list, you might realize that some of these costs are higher in certain parts of the country than others. (California's gas prices and Michigan's auto insurance premiums, for example.) Should drivers in expensive locations receive the same mileage reimbursement rate as drivers in inexpensive places? Let's explore that question.

Disadvantages of mileage reimbursements 

The primary problem with using a standard mileage rate for all drivers within an organization is that these drivers do not actually incur costs at the same rate. Not only do some live in more expensive areas than others, but some drive a lot more than others.

In order for a mileage reimbursement to work, a driver has to drive a certain number of miles per month in order to recover that month's portion of the ownership costs of the vehicle. After reaching that amount, then the mileage-based costs like fuel, oil, and maintenance will start being reimbursed.

At some point, the mileage multiplied by the mileage rate will exactly equal the combined set of expenses for that month. Once the driver reaches that magic number, each mile driven begins to become extra income. If the driver never reaches that number, then their costs are not fully reimbursed for that month.

This creates a problem. A high-mileage driver may end up being over-reimbursed, while a low-mileage driver may end up under-reimbursed. What if that second person drives fewer miles because they work in an urban area, likely expensive? And what if the first person drives a lot because they cover a large, less populated territory, probably less expensive? 

This is an inequitable situation. And if the company has lots of high-mileage drivers, it might even be an unaffordable situation. (Especially if they are manually reporting their mileage, allowing extra miles to be buffered in.)

2019 vehicle reimbursement best practices

Mileage reimbursement problems and solutions in 2020

One other strike against mileage reimbursements is the uncertainty around vehicle travel in 2020. Because of COVID-19, different organizations are following different protocols related to employee travel. Some employees are working remotely and not accruing business mileage. Others are only traveling within a certain smaller radius or making some trips but not others. 

This puts lots of people in the low-mileage category, which means that a standard mileage reimbursement will not sufficiently cover the business portion of their vehicle ownership costs. A different approach is even more important now than ever – one that addresses both ownership and operation costs, that accurately reimburses different employees at different rates based on their location, and that eliminates inequitable discrepancies between reimbursements.

Non-taxable mileage reimbursement alternatives

In order to solve the problems with mileage reimbursements while still keeping the plan accountable and non-taxed, the IRS has offered some solutions. One is a mileage allowance, or a car allowance paired with mileage tracking for substantiation. This approach has serious flaws which you can read about here.

The better option is called fixed and variable rate reimbursement, or FAVR. To learn more about this accountable plan select the button below.

FAVR car driving on highway

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