California employers routinely underestimate cell phone reimbursement. Labor Code section 2802 requires reimbursement for necessary business expenses, including personal cell phone use. The mistake is assuming the obligation only applies when use is substantial. It does not. Any work-related use can trigger reimbursement. A quick call, a text to a supervisor, or logging into a system from a personal device is enough. This is where liability starts to build.

Unlimited Plans Do Not Eliminate the Obligation
One of the most common missteps is relying on the idea that employees are not incurring additional costs. California law rejects that argument. The issue is not whether the employee pays more out of pocket. The issue is whether the employer has shifted a business expense to the employee. Even with an unlimited plan, employers must reimburse a reasonable percentage of the cost when personal phones are used for work.

Policies Are Where Employers Get Into Trouble
Many employers either lack a clear policy or rely on one that does not hold up. Requirements that employees submit detailed bills, prove increased costs, or show substantial use create risk. The law does not require that level of proof. The obligation sits with the employer. Policies that discourage reimbursement or make it difficult to obtain often become evidence in wage claims and PAGA actions.

Stipends Can Work If They Are Defensible
A flat monthly stipend is often the most practical approach. It creates consistency and reduces administrative burden. But the number has to be reasonable. A stipend chosen for convenience, without any connection to actual usage, is unlikely to satisfy the law. Employers should be able to explain how the amount was determined and revisit it as roles and usage change. One size does not always fit all.

Remote Work Increased the Exposure
Remote and hybrid work made this issue more visible. Employees now rely more heavily on personal devices for communication and access. What once felt occasional is now routine. That shift increases risk, especially in California where expense reimbursement claims are frequently included in class actions and PAGA cases. These claims are easy to assert and expensive to defend.

The Compliance Trap
Employers often treat this as a minor issue. It is not. Failure to reimburse can lead to wage claims, waiting time penalties, PAGA exposure, and attorneys’ fees. The risk is not the reimbursement itself. The risk is the cumulative liability that follows when the obligation is ignored or handled inconsistently.

What Employers Should Do Now
Start with a simple question. Are employees using personal cell phones for any work-related purpose. If the answer is “yes,” reimbursement is required. Review policies and remove unnecessary barriers. Evaluate any stipend for reasonableness and document the rationale. Train managers to support compliance, not undermine it.

Bottom Line
If personal cell phones are used for work, reimbursement is not optional. The cost of getting it right is predictable. The cost of getting it wrong is not.