California Workers’ Comp Class Codes Explained

Why California uses WCIRB codes instead of NCCI

Most states take their workers’ compensation classifications from NCCI. California keeps its own. Its classifications and reporting rules sit in the California Workers’ Compensation Uniform Statistical Reporting Plan—1995, known as the USRP, which is section 2318.6 of Title 10 of the California Code of Regulations. The Insurance Commissioner adopts the plan, and the Commissioner names the Workers’ Compensation Insurance Rating Bureau of California (WCIRB) as the statistical agent that gathers insurer data and recommends each year’s changes.

Insurers writing California policies report under the USRP, and the plan is revised every year, with each edition taking effect on September 1 at 12:01 AM. Plenty of California numbers match NCCI numbers, 8810 and 8742 among them, yet the wording, the rules and the wage splits behind them are California’s, so a code copied from an out-of-state policy is only a starting point.

How a California class code is assigned

The first rule is the plainest: if a classification describes your business, that is your class. If none does, the business goes to the closest match judged by process and hazard. For a contractor, that includes the structures built and the type of contractor’s license the work calls for.

Most small employers end up with one code covering everyone. Under the single-enterprise rule, when your operations normally fall within one classification, the entire payroll goes there; the USRP’s own illustration puts a restaurant’s bakers, janitors and valets in the restaurant class. Distinct operations that do not normally go together are classified separately when they are physically apart with no interchange of labor. Where they share space or people and the largest-payroll operation carries the higher rate, everything goes to that higher-rated class.

The class with the most payroll, leaving out the standard exceptions below, is your governing classification, and staff who support more than one operation, such as maintenance workers and shipping clerks, follow it.

Standard exceptions and dual wage codes

Two classes stand apart. Clerical Office Employees (8810) and Outside Salespersons (8742) are Standard Exception classifications, so qualifying office and field sales staff are reported there instead of in the business’s main class. The trade-off is strict. A single employee’s payroll cannot be split between a Standard Exception class and another class in one policy period, apart from one permanent reassignment. And when a class’s wording includes clerical or outside sales staff, those employees stay in that class even at a separate location. The guides to class code 8810 and class code 8742 walk through each test.

Several construction trades have dual wage pairs: two codes for the same work that differ only by the employee’s regular hourly wage. The high-wage code carries the lower rate, and it applies only when time cards, time book entries or a valid collective bargaining agreement with a roster verify that the employee meets the threshold. Salaried pay is converted at 2,000 hours a year. Under the WCIRB’s September 1, 2026 filing, the carpentry threshold rises from $41.00 to $46.00 an hour and the painting threshold from $32.00 to $36.00, with increases for electrical, wallboard and other pairs.

How payroll is reported by class

Codes are set by your insurer when it issues the policy, then checked at the premium audit, when actual payroll for each class replaces the estimate. What the auditor accepts comes down to your records. If an employee works in two classes and the original time records do not separate the hours, that person’s whole pay goes to the highest-rated class among them. Dual wage splits need records too; without them, the payroll lands in the low-wage code.

Owners follow their own rules. A covered owner, whether an executive officer, partner, individual employer or LLC member, is reported on actual pay, but from September 1, 2026 the 2026 filing counts pay under $66,300 as $66,300 and caps pay over $171,600 a year. The WCIRB can also inspect any employer’s premises for classification purposes. For owner coverage questions, see workers’ comp for sole proprietors in California.

How workers comp class codes and the x-mod shape your premium

The arithmetic runs class by class: payroll divided by 100, times the rate for that class. The WCIRB publishes advisory pure premium rates per $100 of payroll for every code, but they are loss-cost benchmarks covering expected claims and the cost of handling them, not what an insurer charges. Insurers add their own expense and profit loadings and are not bound by the advisory figures. For September 1, 2026, the Commissioner adopted an average benchmark of $1.65 per $100 of payroll, up 6.6%, where the WCIRB had asked for $1.71.

The gap between codes is wide. The WCIRB’s September 1, 2026 advisory pure premium rate for 8810 clerical work is 0.214 per $100 of payroll, while 5403 low-wage carpentry sits at 12.075. On $100,000 of payroll, that is a loss-cost benchmark of $214 for the office and $12,075 for the carpentry crew, before the insurer’s own rates, credits, debits and fees. Your experience modifier then adjusts the total. From September 1, 2026, an employer is experience rated once its payroll, run through the plan’s expected loss rates, produces at least $11,700 over completed policy periods. Those expected losses are built from your payroll in each class, so the code you carry feeds the mod as well as the rate.

WCIRB class code lookup and challenging your classification

Start with your policy’s information page and your latest audit report, which list each code and the payroll reported in it. To see what a code covers, read its wording in the USRP the WCIRB publishes and compare it with what your people do each day, not their job titles. A WCIRB class code lookup is most useful before renewal, while a mismatch can still be raised with the insurer ahead of the next audit.

If you believe the classification is wrong, the USRP lays out a three-step path. First, write to the WCIRB naming the policyholder and insurer and explaining what is wrong; the inquiry must arrive within 12 months after the policy expires. Second, if you disagree with the outcome, file a Complaint and Request for Action within 60 days of the WCIRB’s decision, or once 90 days pass without an answer. Third, ask the WCIRB to reconsider, or appeal directly to the Insurance Commissioner.

Timing matters when a code changes. If the WCIRB moves you to a costlier class, the higher rate is backdated to the start of the error only when the correction is published, or written notice goes out, within three months; after that it starts on the publication date. A move to a cheaper class starts with the policy in force when the insurer heard about it, and can reach one expired policy back if that policy ended within the past 12 months.

The 2024 food and beverage code change

The biggest recent reshuffle hit restaurants. Policies that began on or after September 1, 2024 no longer use 9079(1), Restaurants or Taverns; the WCIRB split it into six classes: 9080 full-service restaurants, 9081(1) restaurants not otherwise classified, 9082 caterers, 9083 fast food or fast casual restaurants, 9084 bars and taverns, and 9058 hotel and motel food or beverage employees. Each of the six carries the same September 1, 2026 advisory pure premium rate, 2.784 per $100 of payroll. The restaurant class code guide explains which new class fits which service model.

Class code guides on this site

Each guide below covers one California code: what it includes, where it stops, how its payroll is reported and its September 1, 2026 advisory rate. For the policy itself, see workers’ compensation insurance, and for how claims move your rate, the x-mod explainer.

A few useful answers

Common questions

What are workers comp class codes in California?

They are the WCIRB classifications in the USRP that group employees by the work they do. Each code has its own advisory pure premium rate per $100 of payroll, and your insurer uses the codes on your policy to price it and to audit the payroll behind it.

Why does my California class code differ from the one on my out-of-state policy?

California uses the WCIRB’s Uniform Statistical Reporting Plan rather than NCCI’s system. Many numbers match, but the wording, the rules and the dual wage splits are California’s own, and some numbers, such as restaurant code 9079, were retired here in 2024.

Can a classification change at audit lead to a bill for past months?

It can. When the WCIRB moves a business to a higher-rated class and the correction is published or notified within three months, the higher rate reaches back to the start of the error. Later corrections run from the publication date.

How do I challenge my workers comp class code with the WCIRB?

Write to the WCIRB explaining why the code is wrong, and get the letter there within a year of the policy’s expiry. If you disagree with its decision, a Complaint and Request for Action follows within 60 days, then reconsideration or an appeal to the Insurance Commissioner.

Can I get workers’ comp through Mithril1 for a business with several class codes?

You can, when an insurer takes on the business once it has looked at the payroll in each class, the work your crews do and your past claims. We request quotes using the codes that match what your employees actually do, and the insurer decides after that review.