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A mileage reimbursement policy tells employees when business driving is reimbursable, how mileage should be tracked, what documentation is required, and how reimbursements are calculated and approved.
For employers, a clear policy does more than standardize reimbursements.
It can help support tax compliance, meet applicable state reimbursement requirements, reduce administrative confusion, and create a more consistent experience for employees who drive personal vehicles for work.
Here’s what a strong mileage reimbursement policy should cover.
1. Define Who Is Eligible for Mileage Reimbursement
Start by identifying which employees are covered by the policy.
This may include sales representatives, field service technicians, healthcare employees, regional managers, merchandisers, or other employees who regularly use a personal vehicle for work.
Your policy should explain whether reimbursement applies to all employees who drive for business or only certain roles, departments, or driver groups.
It should also make clear that business driving and ordinary commuting are treated differently.
In general, an employee’s regular trip between home and their normal workplace is considered commuting rather than business mileage for federal tax purposes.
By defining eligibility upfront, employers can reduce confusion about which trips qualify and create a more consistent approval process.
2. Define How Business Mileage Is Treated Under Your Policy
Your mileage reimbursement policy should explain how IRS rules on business transportation apply to employees’ day-to-day driving.
For federal tax purposes, the IRS generally treats travel between workplaces, visits to clients or customers, and trips to business meetings away from an employee’s regular workplace as business transportation.
Ordinary travel between an employee’s home and regular workplace is generally considered commuting and is treated as personal rather than business mileage.
Your policy should make these distinctions clear so employees know how to classify and document their trips consistently.
It should also explain how the company handles situations such as temporary work locations, travel between job sites, and mixed personal and business trips, while accounting for any applicable state reimbursement requirements.
Clearly documenting these rules can help employees submit mileage correctly and give managers a more consistent framework for reviewing and approving mileage claims.
3. Choose a Mileage Reimbursement Method
Your policy should state how employees will be reimbursed.
Three common approaches are Cents-Per-Mile (CPM), Fixed and Variable Rate (FAVR), and Tax-Free Car Allowance (TFCA).
The right model depends on how much employees drive, how predictable that mileage is, and how closely the employer wants reimbursement to reflect actual vehicle costs.
Cents-Per-Mile
With Cents-Per-Mile reimbursement, employees receive a set rate for each business mile driven.
Employers often use the IRS standard mileage rate as a benchmark, although a CPM program does not have to use that exact rate.
The IRS business mileage rate is currently 76 cents per mile for July 1 through December 31, 2026, following a midyear increase from 72.5 cents for the first half of 2026.
The IRS describes the standard mileage rate as an optional method for calculating deductible and reimbursable automobile expenses.
Fixed and Variable Rate
A Fixed and Variable Rate reimbursement separates vehicle costs into fixed expenses, such as insurance and depreciation, and variable expenses, such as fuel and maintenance.
Because FAVR reflects geography, mileage, and vehicle costs, it can be a good fit for employees who drive regularly for work. Employers using FAVR must also follow specific IRS eligibility and compliance rules.
Tax-Free Car Allowance
A Tax-Free Car Allowance (TFCA) provides employees with a set vehicle allowance and uses documented business mileage to substantiate reimbursement under IRS accountable plan rules.
When the applicable requirements are met, qualifying reimbursement can generally be excluded from taxable wages. TFCA can give employers more predictable reimbursement costs while still tying the tax-free treatment of payments to documented business use.
A Mixed Approach
Some organizations use different reimbursement methods for different driver populations.
For example, higher-mileage employees may be better suited to FAVR, while CPM may be more practical for employees who drive occasionally.
This mixed mileage reimbursement strategy allows employers to match the reimbursement method to each group's driving patterns and program needs. The mileage reimbursement policy should clearly explain which method applies to each eligible employee group.
4. Set Mileage Tracking and Documentation Requirements
A mileage policy should explain exactly what employees need to record and how they should submit it.
Under an IRS accountable plan, reimbursed expenses must have a business connection, employees must adequately account for those expenses within a reasonable period, and excess reimbursement must be returned within a reasonable period.
The IRS does not impose a universal 30-day submission deadline for every reimbursement program.
Its safe-harbor guidance generally treats accounting within 60 days as reasonable, although employers can establish their own reasonable submission deadlines depending on the program and applicable law.
Your policy should specify:
- what information employees must record
- how mileage is submitted
- how often submissions are due
- who reviews and approves mileage
- what happens when a submission is late or incomplete
Using a mileage tracking app can make this process easier, especially for organizations managing large mobile workforces.
5. Account for State Mileage Reimbursement Requirements
Federal tax rules are only one part of mileage reimbursement.
Some states have their own employee expense reimbursement requirements, which means employers operating across multiple states should review their policies jurisdiction by jurisdiction.
For example, California Labor Code Section 2802 requires employers to reimburse employees for necessary expenditures incurred in direct consequence of performing their duties.
Vehicle expenses can fall within that requirement when employees are required to use personal vehicles for work.
Illinois also requires employers to reimburse employees for necessary expenditures directly related to their work, subject to the state's requirements and the employer's written expense reimbursement policy.
Massachusetts regulations require reimbursement for associated transportation expenses when employees are required or directed to travel from one place to another after the beginning or before the end of the workday.
Employers should review state-specific requirements with qualified legal or tax professionals when building a policy.
6. Include Insurance and Driver Requirements
If employees use their own vehicles for work, the mileage reimbursement policy should also connect to the company’s broader vehicle and insurance requirements.
Employees may be covered by personal auto insurance for some business driving, depending on the policy, insurer, and type of business use.
Employers should establish appropriate coverage requirements and verify that participating employees continue to meet them.
The policy can also explain requirements related to:
- valid driver’s licenses
- proof of insurance
- minimum company insurance standards
- vehicle eligibility
- driver safety requirements
For FAVR programs specifically, insurance is also one of the fixed costs used to calculate reimbursement, and IRS rules include specific insurance requirements for participating drivers.
7. Explain How Reimbursements Are Approved and Paid
Employees should understand what happens after they submit mileage. A clear policy can outline:
- how mileage is captured
- when it must be submitted
- who approves it
- how corrections are handled
- when reimbursement is paid
This is particularly important for larger organizations where mileage may pass through several layers of review.
Consistent workflows can help finance and HR teams reduce administrative questions while giving employees greater visibility into how their reimbursement is calculated.
8. Review the Mileage Policy Regularly
A mileage reimbursement policy should be reviewed regularly because the costs and rules surrounding business driving can change.
The IRS may update its standard mileage rate, as it did midway through 2026 when the business rate increased from 72.5 cents to 76 cents per mile.
Fuel prices, insurance costs, vehicle prices, employee driving patterns, and state requirements can also change over time.
For employers using FAVR, periodic review is especially important because reimbursement rates depend on current fixed and variable vehicle costs.
Cardata’s 2026 Mileage Reimbursement Benchmark Report shows that both average monthly reimbursement and business mileage have risen year over year, reinforcing the value of regularly reviewing program assumptions.
An annual policy review is a useful starting point, with additional updates whenever regulations, reimbursement methods, or company practices change materially.
What Should a Mileage Reimbursement Policy Include?
A company mileage reimbursement policy should clearly cover:
- employee eligibility
- reimbursable and non-reimbursable mileage
- the reimbursement method used
- mileage tracking and documentation requirements
- submission and approval timelines
- insurance and driver requirements
- applicable state reimbursement rules
- payment procedures
- policy review and update frequency
The goal is to make the rules easy for employees to understand and easy for employers to administer consistently.
Put Your Mileage Reimbursement Policy Into Practice
Creating the policy is one part of managing mileage reimbursement.
Employers also need a way to consistently apply it across their workforce, from mileage capture and reimbursement calculations to insurance verification and reporting.
Cardata helps employers design and manage FAVR, CPM, TFCA, and mixed reimbursement programs.
The platform supports mileage tracking, reimbursement administration, reporting, insurance verification, and ongoing program management.
Whether you're building a mileage reimbursement policy from scratch or reviewing an existing program, talk to Cardata about creating a reimbursement program that fits how your employees actually drive.
Talk to Cardata
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