Understanding Workers' Compensation Mileage Reimbursement Requirements

What Employers Must Know About Mileage Reimbursement in Workers' Compensation

When an employee is injured on the job and needs to travel for medical treatment, many states require the employer to reimburse mileage costs under workers' compensation. This article explains the legal foundations, typical rate calculations, documentation needs, and practical steps employers can take to stay compliant.

Legal Foundations

Workers' compensation statutes vary by state, but most include a provision for travel expenses when medical care is required. The reimbursement is considered a non‑wage benefit and is generally not subject to payroll taxes. Key legal concepts include:

• Medical travel requirement: Reimbursement applies only when travel is necessary for diagnosis, treatment, or follow‑up related to the work injury.
• Reasonable distance: Some states limit reimbursement to the shortest reasonable route between the employee's home (or worksite) and the medical provider.
• Statutory mileage rate: Many states adopt the federal IRS standard mileage rate as a baseline, while others set their own rates.

How Mileage Rates Are Determined

Employers typically use one of three approaches:

• Adopt the current IRS standard mileage rate (e.g., $0.655 per mile for 2024).
• Follow a state‑specific rate mandated by workers' compensation law.
• Implement a custom rate that is "reasonable and customary" under state law.

Below is a snapshot of the most common statutory rates as of early 2024:

Documentation Requirements

Accurate record‑keeping protects both employer and employee. Required documentation typically includes:

• Signed mileage log showing date, purpose, start/end locations, and total miles.
• Copy of the medical appointment notice or referral.
• Proof of payment (e.g., reimbursement check or payroll entry).

Many states mandate that these records be retained for at least three years and be available for audit by the workers' compensation board.

Common Compliance Pitfalls

Employers often stumble on the following issues:

1. Using the wrong rate

Applying the IRS rate in a state that sets a lower statutory rate can lead to overpayment and potential penalties.

2. Reimbursing non‑qualified travel

Reimbursement for personal errands, commuting, or trips not directly tied to medical care is generally prohibited.

3. Inadequate documentation

Missing logs or vague descriptions can cause claim denials or audit findings.

Best Practices for Employers

To streamline compliance, consider these actionable steps:

• Establish a clear policy: Draft a mileage reimbursement policy that references the applicable state rate and outlines documentation standards.
• Use digital tracking tools: Mobile apps can automatically capture GPS‑based mileage logs, reducing errors.
• Train supervisors: Ensure managers know when travel qualifies and how to approve reimbursements.
• Audit regularly: Conduct quarterly reviews of reimbursement records to catch inconsistencies early.

When Rates Change

Both the IRS and individual states may adjust mileage rates annually. Employers should:

• Subscribe to IRS and state labor department updates.
• Revise internal policies within 30 days of a rate change.
• Communicate updates to employees promptly.

Special Situations

Some scenarios require extra attention:

Out‑of‑state medical care

If treatment occurs in another state, the employer should apply the mileage rate of the employee's home state unless the other state's law expressly governs the claim.

Vehicle ownership

Reimbursement is typically based on personal vehicle use. If the employer provides a company car, the mileage expense may be covered under a different expense policy, not workers' comp.

Summary Checklist

Use this quick reference to ensure compliance:

• Confirm the employee's travel is medically necessary.
• Apply the correct statutory or IRS mileage rate.
• Collect a complete, signed mileage log.
• Retain all supporting documents for the required retention period.
• Update policies when rates change.