It is often standard practice to reimburse vehicle expenses using the IRS business mileage rate. In the past, the IRS rate was often sufficient to comply even with California's strict labor laws. It is common for employers to reimburse vehicle expenses using the IRS business mileage rate. However, California employers should not assume the IRS rate automatically satisfies CA Labor Code 2802(a). If the rate does not fully cover an employee’s necessary business vehicle expenses, the employer may face under-reimbursement risk.
Quick Answer: Does the IRS Mileage Rate Comply With CA Labor Code 2802(a)?
The IRS mileage rate may be a useful benchmark, but it does not automatically guarantee compliance with CA Labor Code 2802(a). California employers must reimburse employees for necessary business expenses, which may include the business-use portion of fuel, insurance, maintenance, depreciation, registration, taxes, and other vehicle costs.
If the IRS mileage rate does not fully cover an employee’s necessary business vehicle expenses, the employer may face under-reimbursement risk. That risk can be higher for low-mileage drivers, employees in high-cost areas, or workers with unusually high insurance, fuel, or vehicle ownership costs.
California Reimbursement Laws vs. the Federal Mileage Rate
Many employers use the IRS business mileage rate because it is simple, familiar, and commonly used for tax-free mileage reimbursement under accountable-plan rules. However, the IRS rate is a national benchmark. It is not a California-specific reimbursement guarantee.
CA Labor Code Section 2802(a) requires employers to reimburse employees for necessary expenditures or losses incurred in direct consequence of their job duties. For employees who use a personal vehicle for work, that may include both fixed vehicle costs, such as insurance, depreciation, registration, taxes, and license fees, and variable operating costs, such as fuel, oil, tires, and maintenance.
The risk is that a single national mileage rate may not match every California employee’s actual business vehicle costs. Employers should review whether the reimbursement method fully covers necessary business expenses, especially when employees drive different mileage levels or work in different California territories.
Does the IRS Mileage Rate Always Comply With CA Labor Code 2802(a)?
Not necessarily. The IRS mileage rate can be tax-efficient and easy to administer, but compliance with California reimbursement requirements depends on whether employees are actually reimbursed for necessary business expenses.
For some employees, the IRS rate may be enough. For others, it may fall short. Low-mileage employees may not drive enough business miles to recover fixed vehicle costs such as insurance, depreciation, registration, and taxes. Employees in high-cost areas may also face higher fuel, insurance, maintenance, parking, toll, or vehicle ownership costs than a national rate assumes.
Employers should avoid assuming that the IRS mileage rate is automatically compliant in every situation. A better approach is to review mileage patterns, employee locations, vehicle cost assumptions, and whether employees are being fully reimbursed.
CA Labor Code Section 2802(a) and vehicle reimbursements
Here's what California's labor law states about business reimbursements from employers:
“An employer shall indemnify his or her employee for all necessary expenditures or losses incurred by the employee in direct consequence of the discharge of his or her duties, or of his or her obedience to the directions of the employer, even though unlawful, unless the employee, at the time of obeying the directions, believed them to be unlawful.”
In other words, California state law fully indemnifies, or protects, employees from incurring any work expenses on behalf of their employer. If an employee's job requires a vehicle, the employer must fully cover the costs of both owning and operating the vehicle when carrying out job responsibilities.
To understand why California employees are increasingly threatening to sue their employers for labor code violations, we need to look at exactly which vehicle costs should be reimbursed and what those costs are likely to be.
What vehicle costs are covered by CA Labor Code 2802?
If the job requires the use of a personal vehicle, the basic costs of owning a suitable vehicle are reimbursable. This would include car insurance, vehicle depreciation, taxes, and fees such as registration and license. And then there are the costs of driving the vehicle – fuel, oil, tires, maintenance.
The IRS business mileage rate changes over time and is based on national cost assumptions. For 2026, employers must apply the correct IRS business mileage rate based on when the miles were driven. But even when the correct IRS rate is used, California employers should still review whether the reimbursement fully covers necessary business vehicle expenses under CA Labor Code 2802(a).
For example, an employee who drives relatively few business miles may not receive enough mileage reimbursement to cover the business-use portion of fixed costs such as insurance, depreciation, registration, taxes, and license fees. Another employee in a high-cost California territory may face higher fuel, parking, toll, repair, or insurance costs than a national mileage rate assumes.
This is why California employers should evaluate whether the reimbursement method covers the necessary expenses for their employee population, rather than relying solely on a national benchmark.
California Vehicle Costs and Reimbursement Risk
California vehicle costs can vary significantly by region, commute patterns, insurance profiles, fuel prices, parking, tolls, and employee mileage levels. A single national mileage rate may not reflect those differences.
This does not mean the IRS mileage rate is automatically wrong for every California employer. It means employers should periodically review whether the rate actually covers the necessary business-use portion of employees' vehicle expenses.
A reimbursement review should consider both fixed costs, such as insurance, depreciation, registration, taxes, and license fees, and variable costs, such as fuel, oil, tires, and maintenance.
Low-Mileage and High-Mileage Drivers vs. the IRS Mileage Rate
The IRS mileage rate can create different risks for different drivers.
Low-mileage drivers may be under-reimbursed because fixed costs do not disappear when business mileage is low. Insurance, depreciation, registration, taxes, and license fees can still apply even if an employee drives only a few hundred business miles in a month.
High-mileage drivers face a different issue. They may receive more mileage reimbursement, but variable costs such as fuel, tires, oil, and maintenance can still vary by location, route, vehicle type, and driving conditions.
California employers should review whether each employee’s reimbursement reflects both fixed and variable vehicle costs, rather than assuming that a single national mileage rate applies to every driver.
FAVR Reimbursement and CA Labor Code 2802(a)
FAVR, or Fixed and Variable Rate reimbursement, can help employers address some of the limitations of one national mileage rate.
A FAVR plan separates fixed vehicle costs, such as insurance, depreciation, registration, taxes, and license fees, from variable operating costs, such as fuel, oil, tires, and maintenance. This structure can help employers account for mileage levels, employee locations, and vehicle cost assumptions.
FAVR can also support tax-free reimbursement when IRS requirements are met and business mileage is properly documented. For California employers, the larger value is that FAVR creates a more cost-specific reimbursement method that can be reviewed against necessary business vehicle expenses under CA Labor Code 2802(a).
FAQs About the IRS Mileage Rate and CA Labor Code 2802(a)
Does the IRS mileage rate automatically comply with CA Labor Code 2802(a)?
No. The IRS mileage rate may be useful for tax-free mileage reimbursement, but California employers still need to review whether employees are fully reimbursed for necessary business vehicle expenses.
Can the IRS mileage rate under-reimburse California employees?
Yes. The IRS rate can under-reimburse employees when their necessary business vehicle expenses exceed what the mileage payment covers. This risk can be higher for low-mileage drivers, high-cost regions, or employees with higher insurance, fuel, maintenance, or vehicle ownership costs.
What vehicle expenses should California employers consider?
California employers should consider fuel, insurance, depreciation, registration, taxes, license fees, oil, tires, maintenance, parking, tolls, and other necessary business vehicle expenses.
Is the IRS mileage rate illegal in California?
The IRS mileage rate is not automatically illegal in California. The issue is whether the reimbursement fully covers the employee’s necessary business expenses under CA Labor Code 2802(a).
Why can low-mileage drivers be under-reimbursed?
Low-mileage drivers may not drive enough business miles to recover fixed costs such as insurance, depreciation, registration, taxes, and license fees. Those costs can exist even when monthly business mileage is low.
Is FAVR better for California mileage reimbursement?
FAVR may be a better fit for California employers with employees across different territories, mileage bands, or vehicle cost profiles. It separates fixed and variable vehicle costs and can create a more cost-specific reimbursement structure.
Not sure whether the IRS mileage rate fully covers your California employees’ business vehicle expenses? mBurse can help you compare IRS-rate reimbursement, actual vehicle costs, mileage patterns, and FAVR options to identify where your program may be creating under-reimbursement risk.
