Before You Choose A Car Allowance, Consider the Tax Implications 

Many organizations with employees who drive their personal vehicles as part of their regular work-related activities, and want to compensate them for that cost. A car allowance for mobile employees is one of the possible reimbursement solutions.

Many businesses beeline for this option, because of its perceived simplicity and ease of setup. But, like with most things, there’s more to it than that. In this article, we’ll break down what a car allowance program is, its benefits and drawbacks, its tax implications, and other tax-free options. 

What’s a Car Allowance? How Does it Work?

A car allowance pays eligible mobile employees a fixed sum on a set schedule to cover the cost of using their personal vehicles for work. That payment covers the ordinary expenses of owning a vehicle: maintenance, wear and tear, insurance, fuel, and depreciation. 

Every business that sets a car allowance can choose how much they want that payment to be, but the average cost of a business car allowance payment rests around $700. 

Companies set the dollar amount through a written policy that assigns amounts based on role, seniority level, or territory. Every employee in the same category receives the same amount. That amount does not fluctuate from month-to-month, making budgeting easy for both mobile employees and payroll. 

Car allowances are popular in roles that require frequent consistent driving, like sales, construction, and healthcare. 

The Upsides of Using a Car Allowance

The main selling point of using a car allowance is this: it’s so easy.

Car allowances are easy to budget, easy to distribute, easy to maintain, and easy for employees to comprehend. There’s no calculations, no reimbursement policy to pore over. And there’s no need for mileage tracking, insurance verification, or reimbursement rates.

With a car allowance program, employees appreciate the reliability and convenience, and HR, finance, and operations teams appreciate that there’s no additional admin or report processing required. 

The Drawbacks of Using a Car Allowance 

That simplicity does come with a cost, however – both figuratively and literally. 

Is It Equitable?

As we’ve noted, every employee in the same car allowance category receives the same amount, no matter how much they actually drove that month. 

So if one employee drives 50 miles in a month, and a different employee in the same category drives 500, they’re both receiving the same amount. This is great news for the first employee, whose car allowance more than covers the cost of their travel. Not so much the second employee, whose driving expenses well exceed the car allowance amount.

There’s also the inequality created by regional differences to consider. Maybe a business has employees all over the United States, and all those employees are receiving the same amount for their car allowance.

But odds are that your employees in San Diego or New York have to pay much steeper prices for fuel and insurance than their coworkers in, say, Idaho. Even if those employees rack up the same mileage totals, the costs they incurred will probably vary wildly. 

Does it Actually Cover Costs?

The largest cost associated with owning and operating a vehicle – yes, even bigger than the cost of fuel – is depreciation. The more wear and tear you put on your car, the more value it loses. The more an employee drives for work, the more that depreciation accelerates (along with repair costs, fuel costs, maintenance costs, etc.) 

Again, this works out pretty well for the 50-miles-a-month employee. For the 500-miles-a-month worker, whose business travel has put a lot of extra wear on their car, this arrangement probably seems wildly unfair.

The Risk of Complacency

Yes, a car allowance is easy. It’s simple for employers and employees alike. 

But is it too simple?

Many businesses that use a car allowance do so because that’s what they’ve always done. There’s not much admin required, and no documentation needed from mobile employees, so many businesses set up a car allowance program and then…leave it. If it ain’t broke, why ruin that ease by trying to fix it? 

What started as an attempt to provide the most consistent, reliable compensation gets overwritten by complacency. Nobody wants to take the time and make the effort to regularly assess whether the allowance amount covers current vehicle costs, so no one does. 

So vehicle costs keep rising, discrepancies and resentments between employees keep piling up, and that car allowance cost sits there. 

And while we’re discussing the potential drawbacks of using a car allowance, we have to ask one more question:

What About Taxes?

Generally the IRS treats a car allowance as compensation, so it gets taxed the same way an employee’s salary does. Income tax withholding, Social Security, and Medicare all apply to the payment.

This is where using a car allowance program can get really costly. Let’s say that you give an employee a $600 monthly car allowance, or $7200 a year. At a blended 30% tax rate, roughly $2,160 goes to taxes. So of that $7200, your employee actually takes home around $5,040. 

That’s a bum deal for your employees, and it’s not great for the company itself, either. Every dollar of car allowance you pay gets hit with a 7.65% employer payroll tax. So that $7,200 allowance ends up costing about $7,751. 

Now imagine applying that $551 difference for every single mobile employee. If you have 50 employees on the same allowance, payroll tax alone adds roughly $27,550 to your costs. 

Are There Other Options?

If you don’t want to incur any of the costs of a taxable car allowance, alternatives exist that align with the rules of an IRS Accountable Plan. The accountable plan dictates that employee mileage is accountable, non-taxable, if the following rules are followed:

• Expenses are ordinary and necessary business costs. 
• Employees must prove the business purpose of each trip with adequate documentation (that shows the mileage, date, time, location, and business purpose of each trip), submitted within a reasonable time period. 
• Employees must return payments that exceed their documented expenses. 

Car Allowance With Mileage Substantiation

Also known as a tax-free car allowance (TCFA), this method uses a car allowance, but follows the rules of the accountable plan through IRS Publication 463. Employees submit expense reports documenting the information required by the IRS, and reimbursements made at or below the IRS standard mileage rate get excluded from taxable income. 

FAVR Reimbursement

A Fixed and Variable Rate Allowance, or FAVR, reimburses employees for business use of their vehicles using both a fixed payment to cover ownership costs and a variable mileage rate to address operating costs. 

What About Mileage Reimbursement? 

Mileage reimbursement, also known as the cents-per-mile method, reimburses employees for their business mileage at a set rate. Employees fill out mileage logs and submit expense reports, and, once approved, receive a reimbursement payment that applies that rate to each business mile. 

While it’s not mandatory, most businesses default to using the standard mileage rate set annually by the IRS (which, as of September 2026, is 76 cents per mile.) 

Unlike car allowances, TCFA and FAVR, mileage reimbursements are totally dependent on how much an employee travels. Payments will differ from employee to employee as their business mileage does. 

While mileage reimbursement requires far more documentation than a car allowance ever will, there are a number of positive tradeoffs. 

For one, it’s far more accurate. By reimbursing employees only for their actual substantiated business mileage, businesses don’t need to worry about wasting money by overpaying, or about slighting workers by giving them too little an allowance to actually cover costs.

That difference makes mileage reimbursement a much fairer option, as well. If an employee doesn’t actually have to drive for work that often, they’ll receive a smaller payment than an employee driving 500 miles a month. 

Plus, as long as your employees’ mileage logs follow the accountable plan rules, mileage reimbursement won’t come back to haunt you during tax season the way a car allowance might. As long as you follow the rules, reimbursement payments don’t get treated as taxable income. 

What’s the Right Choice For Your Business? 

For a lot of businesses, using a car allowance program to compensate mobile employees makes the most sense. It’s straightforward, it’s easy, and if your mobile employees all live in the same region and drive similar distances, then it’s not a bad choice.

As long as you don’t mind paying taxes on that allowance. 

For businesses with workers who drive variable distances, who want reimbursements to actually align with incurred costs, mileage reimbursement offers a more accurate alternative. The biggest tradeoff required to keep reimbursements tax-free is the recordkeeping requirement, but that doesn’t have to be a dealbreaker for your business. 

Keep Mileage Reimbursement Fast, Simple and Intuitive with CompanyMileage

CompanyMileage and its suite of reimbursement software solutions offers businesses an automated, easy-to-use way to track, log, and reimburse employees’ business mileage.  

Unlike other mileage logging methods and apps, our mileage reimbursement software, SureMileage, uses a point-to-point calculation method. Mobile employees enter the start and end points of each work-related trip, and the software finds the best route between them, and uses that mileage to calculate the amount for reimbursement. 

This takes the onus of manually tracking, logging and calculating mileage off of employees, gathering the required data while leaving mobile workers free to do their actual jobs. Point-to-point reimbursement also keeps calculation errors, inflated or duplicated mileage totals, and ineligible mileage from ending up in logs and impacting reimbursement payments. 

With our mobile app, SureMobile, employees can create, edit and send expense reports straight from their smartphones. To ensure timely reimbursement, they just need to take a few minutes at the end of each day to organize their trips, snap photos of any relevant receipts, and submit expense reports for review. 

Once submitted, expense reports move through an automated approval workflow, which can be easily customized to meet the unique needs of your business. CompanyMileage systems are also compatible with all major account and payroll software, so workers never have to worry about a delayed payment. 

To learn more about how CompanyMileage can save you time, trouble, and money on travel, request a demo today!