How Much Is Mileage Reimbursement in California: Rules and Claims

In California, employers must reimburse you for the cost of driving your personal vehicle on the job, and the standard benchmark is the IRS business mileage rate, which is 72.5 cents per mile for 2026.¹ The California mileage reimbursement rate is not fixed by state statute; instead, Labor Code Section 2802 requires employers to cover all necessary expenses you incur doing your job, and paying the IRS rate is the most common way employers meet that duty.²

The 72.5-cent figure took effect January 1, 2026, and applies the same way to fully electric vehicles, hybrids, and gasoline or diesel cars.¹ The rate is meant to cover the full cost of running the vehicle: fuel, oil, tires, repairs, insurance, registration, and depreciation.

Why the Rate Matters Under California Law

Labor Code Section 2802 makes every California employer responsible for necessary expenses employees incur as a direct result of their work.² For a worker using a personal car, that means fuel, maintenance, insurance, depreciation, and the other running costs of the vehicle. The obligation exists whether or not the employer has written a reimbursement policy.

You cannot sign this right away. Labor Code Section 2804 makes any agreement waiving Section 2802 protections “null and void.”³ A handbook clause or contract term saying you won’t seek reimbursement has no legal effect.

California courts have accepted the IRS standard mileage rate as a reasonable way to comply with Section 2802. If your employer pays at least that per mile, it’s generally treated as adequate. But the rate is a safe harbor, not a ceiling: when your actual vehicle costs run higher, say because you drive an older car with heavy repair bills, you can seek the difference based on documented expenses.

Which Miles You Can Claim

Your Commute Doesn’t Count

Driving from home to your regular workplace and back is a personal expense, not a business one, no matter the distance.⁴ Reimbursable driving starts once you leave your primary work location for another business destination: a client visit, another job site, a supply run.

If your employer asks you to make a business stop on the way in, only the extra miles beyond your normal commute route count. You compare the detour distance to what you would have driven anyway.

When There’s No Fixed Office

The commute rule changes if you don’t report to a single workplace. A home health aide moving between patients or a tradesperson going from site to site has no “normal commute” to exclude, so travel from home to the first stop and from the last stop back home generally counts as reimbursable business mileage.

Temporary Assignments

Travel to a temporary work location away from your usual area can qualify too. The IRS treats an assignment as temporary if it’s realistically expected to last one year or less. An assignment expected to last longer than a year is considered indefinite, and travel to it is treated as a non-reimbursable commute. If your expectation shifts partway through, from six months to eighteen, for example, the travel stops qualifying on the date your expectation changed.⁵

How Employers Are Allowed to Pay

California doesn’t lock employers into one method. Any approach works as long as it fully covers your actual expenses.

Per-Mile at the IRS Rate

The most common method: business miles multiplied by 72.5 cents for 2026.⁶ You track miles, submit them, get paid. California courts consistently accept this as reasonable compliance with Labor Code 2802.

Actual Expenses

Some employers reimburse based on what the car actually costs to operate. That means receipts for gas, oil changes, tires, repairs, insurance, and registration, plus depreciation, allocated to the business-use percentage. More accurate, but far more paperwork on both sides.

Flat Car Allowance

A fixed monthly stipend, paid regardless of miles driven, is simple to administer but risky for the employer. If the flat amount doesn’t cover your real costs or the equivalent mileage-rate payment, your employer still owes the shortfall under Section 2802.² Flat allowances also carry tax consequences described below.

Fixed and Variable Rate (FAVR)

A FAVR plan splits the payment: a fixed monthly amount for costs like insurance, registration, and depreciation, plus a variable per-mile amount for fuel and maintenance.⁶ Complex to set up, but it can match reimbursement to what each driver’s costs actually look like in their area.

Whether the Money Is Taxable

Mileage reimbursement comes to you tax-free only if your employer’s plan is an “accountable plan” under IRS rules. That requires three things:⁷

A business connection: the expenses were incurred doing your job.
Substantiation: you give your employer adequate records (date, destination, purpose, miles) within a reasonable time.
Return of excess: if you’re paid more than your documented expenses, you return the overage within a reasonable time.

Meet all three and the payment stays off your W-2 and outside income and payroll tax. Miss any one, and the entire amount becomes taxable wages.⁸ This is the tax trap with flat car allowances: without mileage logs, the whole stipend hits your W-2 as income.

Paying at or below the IRS standard rate automatically handles the substantiation piece for the per-mile amount, so you don’t need to save individual gas or repair receipts. You still need a mileage log.

Records You Need to Keep

A proper log supports your claim with your employer and satisfies IRS rules so the payment stays tax-free. For each trip, record:

The date.
Where the trip started and ended.
The business purpose, in a short note like “client meeting at XYZ Corp” or “supply pickup at warehouse.”
Miles driven, either from odometer readings or a GPS tracking app.

Log trips as they happen rather than reconstructing them at month’s end. GPS-based apps handle this automatically and cut down on missing entries. Keep the records at least four years, which covers both the California claim window and the IRS audit period.

If Your Employer Won’t Pay

What It Costs the Employer

An employer that fails to reimburse mileage owes more than just the miles. Interest runs at the civil judgment rate from the date you incurred each expense, not the date you filed. You can also recover reasonable attorney fees and costs of enforcing your rights.² The Labor Commissioner can issue citations directly. For workers near minimum wage, unreimbursed driving that pushes take-home pay below minimum can trigger separate wage-and-hour violations.

How to File a Claim

You can file a wage claim with the California Division of Labor Standards Enforcement (DLSE), also called the Labor Commissioner’s Office. Claims go in by email, mail, or in person at a local DLSE district office. For unreimbursed expenses, DLSE offers a Schedule of Expenses form to itemize what you’re owed; you can use your own format if it contains the same information.⁹

You can also sue in court. For smaller amounts, small claims may be an option, subject to filing fees and jurisdictional limits.

Deadline to File

You generally have three years from the date the expense was incurred, under California Code of Civil Procedure Section 338(a). The deadline can stretch to four years in some cases brought under California’s unfair competition law. Waiting means losing the older months, so if unreimbursed miles have been stacking up, act while the whole period is still recoverable.

1
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents
2
California Legislative Information. California Labor Code 2802
3
California Legislative Information. California Labor Code 2804
4
U.S. Department of Labor. Travel Time
5
Internal Revenue Service. Topic No. 511, Business Travel Expenses
6
Internal Revenue Service. 2026 Standard Mileage Rates
7
Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses
8
eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
9
California Division of Labor Standards Enforcement. DLSE Supporting Documents