Adding a fuel card or fuel reimbursement to a car allowance may seem like an easy way to help employees with rising gas costs. But fuel cards can also create cost, tax, policy, and documentation issues if they are not managed carefully.
Before adding a fuel card to a personal-vehicle reimbursement program, employers should understand how fuel purchases will be tracked, how business and personal use will be separated, how mileage will be documented, and whether the fuel card solves the broader reimbursement problem.
Quick Answer: Should Employers Add a Fuel Card to a Car Allowance?
Employers should be careful before adding a fuel card to a car allowance. A fuel card may help employees pay for gas, but it can also make reimbursement harder to manage if the company cannot separate business fuel from personal fuel.
Before adding a fuel card or fuel reimbursement, employers should review employee mileage, vehicle efficiency, fuel card limits, business and personal mileage documentation, taxable personal use, and whether mileage reimbursement or FAVR reimbursement would be a cleaner alternative.
3 Things to Know About Fuel Cards and Reimbursements
If your company is considering a fuel card or fuel reimbursement, focus on three questions:
- Are you subsidizing costs created by employee vehicle choices?
- Can you separate business fuel from personal fuel?
- Do you have a policy and mileage process strong enough to control cost?
A fuel card can be useful in the right program, but it should not be added without clear rules, mileage documentation, and a plan for handling personal use.
Adding a Fuel Card to a Car Allowance
Many employers use a car allowance, mileage reimbursement, or fuel reimbursement to help employees cover the cost of using a personal vehicle for work. A fuel card may seem like a simple add-on because it gives employees a direct way to pay for gas.
The challenge is that fuel is only one part of vehicle cost. Employees may also incur insurance, maintenance, depreciation, registration, taxes, tires, repairs, parking, and tolls. A fuel card may help with gas, but it does not necessarily make the full vehicle reimbursement program accurate, fair, or easier to manage.
Employers should review whether the current allowance or reimbursement method is the real issue before adding another payment method.
How Does Fuel Card Reimbursement Work?
A fuel card gives employees a company-paid card to purchase gas. A fuel reimbursement program usually requires employees to submit fuel receipts for reimbursement.
Both methods can be convenient, but both require controls. Employers should define who is eligible, what purchases are allowed, whether receipts or odometer readings are required, how personal fuel is handled, and how fuel purchases are compared with documented business mileage.
Fuel cards are often easier to manage with company-owned vehicles because the employer controls the vehicle. They can be harder to manage with personal vehicles because employees may use the same vehicle for business and personal driving.
What Drives the Cost of a Fuel Card or Fuel Reimbursement?
The cost of a fuel card or fuel reimbursement depends on more than the price of gas. Employers should review employee vehicle efficiency, business mileage, personal use, territory size, purchase limits, mileage documentation, and manager review.
A company may overpay when employees buy fuel for personal driving, when fuel purchases are not compared with business mileage, or when lower-MPG vehicles receive the same support as more efficient vehicles.
A fuel card policy should make it clear how fuel purchases are approved, reviewed, limited, and documented.
1. Employee Vehicle Choice Affects Fuel Cost
Employees who use personal vehicles for work may drive vehicles with very different fuel efficiency. One employee may drive a compact car, while another may drive a large SUV or pickup truck.
If the company provides a fuel card without considering vehicle efficiency or business mileage, it may subsidize higher fuel costs that are not necessarily tied to job requirements.
Employers should review whether the reimbursement program is based on the vehicle needed for the job, not simply the vehicle each employee chooses to drive.
2. Mileage Records Are Needed to Separate Business and Personal Use
Fuel cards and fuel reimbursements are difficult to control without accurate business mileage records. Employers need to know whether fuel purchases support business activity or personal driving.
IRS recordkeeping guidance says timely kept records have more value than records created later when recall may be less accurate. For car expenses, records generally need to show mileage for each business use, the date, business destination, and business purpose.
A mileage tracking app can help employees document business mileage and help managers compare fuel purchases with business driving.
3. Fuel Card Policies Should Address Personal Use
A fuel card policy should explain who is eligible, what purchases are allowed, whether employees must submit receipts or odometer readings, how exceptions are reviewed, and how personal-use fuel is handled.
Personal use is one of the biggest fuel card risks. IRS Publication 15-B explains that personal use of an employer-provided vehicle is generally treated differently from business use, and the value of personal use must generally be included in wages or reimbursed by the employee.
Employers should decide whether personal-use fuel will be prohibited, taxed when applicable, or charged back to the employee. The policy should also explain how business and personal mileage will be tracked.
FAQs About Fuel Cards and Reimbursements
What is fuel card reimbursement?
Fuel card reimbursement is a process where employees use a company-paid fuel card or submit fuel receipts for repayment when they drive for business.
Should employers add a fuel card to a car allowance?
Employers should review this carefully. A fuel card may help cover gas, but it can also create personal-use, tax, documentation, and cost-control issues if business and personal mileage are not separated.
Can a fuel card replace mileage reimbursement?
Not always. A fuel card may cover fuel, but mileage reimbursement may also account for other vehicle costs such as maintenance, insurance, depreciation, registration, tires, repairs, parking, and tolls.
How can employers control fuel card costs?
Employers can control fuel card costs by setting purchase limits, requiring receipts or odometer readings, tracking business mileage, reviewing exceptions, and defining how personal-use fuel is handled.
Is personal-use fuel taxable?
Personal-use fuel may create taxable compensation unless it is reimbursed by the employee or handled under applicable IRS rules. Employers should review IRS fringe benefit guidance and apply a consistent policy.
What is the best alternative to a fuel card?
The best alternative depends on employee mileage, vehicle costs, tax treatment, and administration. Employers may compare mileage reimbursement, car allowances, actual expense reimbursement, or FAVR reimbursement.
Review Your Fuel Card and Reimbursement Program
Before adding a fuel card to a car allowance, review whether the program can separate business fuel from personal fuel, document mileage accurately, control purchases, and support employees fairly.
mBurse can help employers compare fuel cards, fuel reimbursement, mileage reimbursement, car allowances, FAVR reimbursement, mileage tracking, and vehicle-cost data to determine which approach best fits their workforce.
