Workers Compensation Insurance: A Guide for Employers

Workers compensation insurance pays the benefits your state's law requires when an employee is hurt on the job or gets a work-related illness: medical care, disability payments, rehabilitation and death benefits, regardless of who was at fault. The same policy includes employers liability insurance, which defends and pays work-injury lawsuits against the employer that fall outside the workers compensation law. Menlo quotes workers compensation insurance for California employers.

Most owners think of this as one coverage. It is really two, and the expensive surprises usually come from the second one, employers liability.

What is workers compensation insurance?

Workers compensation is a trade set by law: employees get prompt, no-fault benefits for work injuries, and in exchange they give up the right to sue their employer, which makes workers comp their "exclusive remedy." An injury or illness is compensable when it meets two tests: it arose out of the employment, meaning the job caused it, and it happened in the course of employment, at the right time and place. The National Council on Compensation Insurance (NCCI) writes the standard Workers Compensation and Employers Liability Insurance Policy (form WC 00 00 00 C). Its information page lists the covered states in Item 3.A and the employers liability limits in Item 3.B.

What benefits does workers compensation pay?

Workers compensation pays four kinds of benefits set by state law. Part One adopts your state's workers compensation law by reference, which is why it has no standard limit:

• Medical benefits cover necessary care for a compensable injury, from surgery to physical therapy and prescriptions. The statute, not a policy limit, decides what is paid.
• Disability benefits replace part of lost wages, subject to state maximums and a waiting period. California pays no temporary disability for the first three days off work unless the worker is hospitalized or the disability lasts more than 14 days.^[1]
• Rehabilitation benefits pay to restore the employee's physical ability, plus vocational rehabilitation in some states.
• Death benefits cover burial expenses and ongoing support for qualifying dependents.

One caveat surprises owners: under Part One, you may have to repay the insurer for benefits it pays because of your serious and willful misconduct, an OSHA violation or an illegal firing.

What is employers liability insurance (Part Two)?

Employers liability, Part Two of the policy, covers work-injury lawsuits that the workers compensation law does not block. If workers comp is the exclusive remedy, why does the policy need a liability section? Because the statute doesn't reach every employment-related claim. Employers liability insurance covers lawsuits for work-related bodily injury outside that law, claims that are rare but expensive.

Third-party action-over claims are the most common trigger. A worker hurt using your equipment collects workers compensation under Part One, then sues the equipment manufacturer, and the manufacturer sues you for poor maintenance. If the suit comes back to you through an indemnity clause in an insured contract, it goes to your general liability policy. If there is no such indemnity, Part Two responds. Part Two is limited by Item 3.B, most often $1,000,000 each for bodily injury by accident, disease policy limit and disease each employee, and it has 12 exclusions, including contractual liability, punitive damages and employment-related claims such as wrongful termination.

How is workers comp premium calculated?

Workers comp premium is your payroll in each job classification, multiplied by that class's rate per $100 of payroll, then adjusted by your experience modification factor. The mod gives a credit when your losses are better than expected for your classes and a debit when they are worse. The market also matters: workers compensation insurers ended calendar year 2025 with a combined ratio of 91%, according to NCCI's annual State of the Line report,^[2] which means they are making an underwriting profit and competing for accounts with clean histories.

The premium is also provisional. An auditor reviews your actual payroll after the policy period, and the final bill can change at audit. California does not use NCCI rating at all: its class codes and mods come from the WCIRB.^[3] The details that go wrong most often:

• Verify your classifications: misclassified payroll is the most common audit surprise.
• Check the states in Item 3.A: Part One applies only to the states listed there, and the four monopolistic states are excluded from the policy entirely.
• Match endorsements to contracts: unlike the CGL, the policy allows no waiver of subrogation without the WC 00 03 13 endorsement, and the entity usually must be scheduled.
• Mind leased and contracted labor: collect a certificate of insurance from every subcontractor, since an uninsured sub or PEO gap can leave you the statutory employer of their injured worker.

What to check on your workers comp policy

Get a copy of your information page from your broker and confirm that the class codes match the work your employees actually do. Workers compensation pays statutory, no-fault benefits to employees hurt on the job, and its employers liability section (Part Two) defends and pays the work-injury lawsuits workers comp doesn't reach. Your premium depends on two things: your class codes and payroll, which set the base premium, and your experience mod, which rewards few losses and penalizes many.

This guide is for educational purposes and summarizes standard NCCI policy language. Your policy's specific terms, conditions, and endorsements control. Talk to a licensed broker about your actual exposures.