If you drive your own car for work in California, your employer owes you more than gas money. Under Labor Code Section 2802, California mileage reimbursement must cover the full cost of operating your vehicle for the job, including fuel, insurance, maintenance, and depreciation. Most employers meet this duty by paying the IRS standard mileage rate, which for 2026 is 72.5 cents per mile.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents
What the Law Actually Requires
Labor Code Section 2802 says an employer must reimburse an employee for all necessary expenses the employee incurs as a direct result of doing their job.2California Legislative Information. California Code LAB 2802 It applies to hourly, salaried, full-time, and part-time workers alike. When the work requires you to drive your own car, the employer pays the vehicle costs tied to that driving.
“Necessary expenses” for a personal vehicle is a broader category than most employees realize. It covers a proportional share of depreciation, tire wear, oil changes, insurance premiums, and the general maintenance that comes with putting business miles on your car. The statute does not let an employer pick which costs to cover. Reimbursement has to reflect the real, total cost of operating the vehicle for work.
You cannot sign this right away. Labor Code Section 2804 declares that any contract or agreement, written or implied, waiving the right to reimbursement under Section 2802 is null and void.3California Legislative Information. California Code LAB 2804 If your employer handed you a policy acknowledging a lower rate or asking you to absorb vehicle costs, that document does not bind you.
Which Miles Count
Not every mile is reimbursable. Your normal commute between home and a fixed workplace is on you. Driving done during or because of your work duties is on the employer. That includes travel between job sites, trips to pick up supplies, client visits, deliveries, and driving to mandatory training sessions at locations other than your regular workplace.
The line gets harder to draw if you don’t have a single fixed workplace. If you work from home and then drive to a client site, or report to different locations each day, the commute-versus-business question depends on the facts. California courts have generally held that driving to different job sites within a normal commuting range can still count as a commute. But requiring an employee to transport the employer’s tools or supplies in their personal vehicle can convert that drive into compensable travel. Employees who regularly drive to varying locations should pay close attention to how their trips are being categorized.
The 2026 Rate and What Employers Can Pay Instead
The simplest way to calculate reimbursement is the IRS standard mileage rate: 72.5 cents per mile for 2026.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents The rate applies the same way to gas, diesel, hybrid, and fully electric vehicles. The IRS sets it based on an annual study of fixed and variable operating costs, and California’s Division of Labor Standards Enforcement accepts it as a reasonable reimbursement for the full cost of operating the car.4California Department of Industrial Relations. DLSE Opinion Letter – Reimbursement for Expenses
An employer can use another method. A flat monthly car allowance is common, as is reimbursement of actual documented expenses. The catch is that whatever method the employer picks must fully cover your real costs. If your employer pays a flat 50 cents per mile, you can challenge that rate, and the employer then has to prove the lower amount actually covered everything: fuel, insurance, maintenance, and depreciation. If you can show the reimbursement fell short, the employer owes the difference. Using the IRS rate avoids that fight because it is treated as presumptively adequate.
Keeping a Mileage Log That Holds Up
You carry the burden of documenting your mileage well enough to support a claim. A solid log includes the date of each trip, starting and ending locations, total miles, and the business reason for the trip. Keeping it current is far easier than reconstructing it weeks later, and gaps give employers an excuse to delay payment.
Your employer can require you to use a specific app or form, but they cannot deny reimbursement just because you used a different format. If your records contain the necessary information and are verifiable, the claim must be processed. Even so, using whatever system your employer provides tends to speed payment and avoid friction.
When Reimbursement Has to Be Paid
Once you submit a complete expense report, the employer has to reimburse you promptly. California law does not fix a specific number of days, but the DLSE expects reimbursement in the same pay period as submission or the one immediately following.
The stakes jump when employment ends. All outstanding unreimbursed expenses have to be included in your final wage payment. If you were fired, payment is due immediately. If you resigned with at least 72 hours’ notice, your final wages, including owed mileage, are due on your last day. If the employer fails to pay, your wages continue to accrue as a penalty at your daily rate until the balance is paid or a lawsuit is filed, capped at 30 days.5California Legislative Information. California Code LAB 203 For someone earning $200 a day, that’s up to $6,000 in penalties on top of the unpaid reimbursement.
Is Mileage Reimbursement Taxable?
Whether your reimbursement gets taxed depends on how the employer structures the program. Under IRS rules, reimbursements paid through an “accountable plan” are excluded from your income and never appear as wages on your W-2.6Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses To qualify as an accountable plan, three conditions have to be met:
- The expenses were incurred while performing your job duties.
- You document your expenses to your employer within 60 days of incurring them.
- You return any advance or reimbursement that exceeded the substantiated amount within 120 days.
When all three are met, the reimbursement stays off your tax return. If any one is missing, the whole reimbursement becomes taxable wages, subject to income tax withholding, Social Security, and Medicare.7Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3 Sloppy record-keeping costs you twice: once when the employer questions the reimbursement, and again when the IRS treats it as income. If the employer pays an allowance that exceeds the substantiated amount, only the excess is taxable.
What To Do If Your Employer Won’t Pay
If your employer refuses to reimburse valid mileage, the most accessible option is filing a wage claim with the California Labor Commissioner’s Office. You can file online, by email, by mail, or in person, and there is no filing fee.8California Department of Industrial Relations. Labor Commissioner’s Office – How to File a Wage Claim The office investigates and usually schedules a settlement conference. If that does not resolve the dispute, it moves to a formal hearing where an officer reviews the evidence and issues a decision.
Recovery can go well beyond the unpaid mileage. Any award under Section 2802 carries interest at the civil judgment rate, accruing from the date you originally incurred the expense. Section 2802 also explicitly includes attorney’s fees and litigation costs as “necessary expenditures,” so a successful claim shifts those costs to the employer.9California Legislative Information. California Labor Code 2802 If the employer withheld reimbursement at termination, waiting time penalties under Labor Code 203 can add up to 30 more days of your daily pay.5California Legislative Information. California Code LAB 203
You can also skip the administrative route and file directly in civil court. The fee-shifting provision in Section 2802 makes these cases attractive to employment lawyers, because the employer pays the legal bill if you win. Between interest, penalties, and fees, employers who shortchange employees on mileage often pay far more than the original reimbursement would have cost.