California class codes are published by the WCIRB, and this site lists the ones that mention each trade's work. Arizona and Nevada use NCCI classifications: Nevada's Division of Insurance posts code numbers without descriptions, and Arizona has no official public list we can point to. A code from one state never carries over to another.
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| State | Classification System | Official Public List | On This Site |
|---|---|---|---|
| California | WCIRB | Published classifications with official titles, searchable on the WCIRB site. | Trade panels and a search of the full list |
| Nevada | NCCI | Division of Insurance advisory loss cost files list code numbers and loss costs, with no descriptions. | Not listed until plain-language labels are approved |
| Arizona | NCCI | None that this site can point to. | Not listed |
California runs its own system. Each classification has a number and an official title, and some carry numbered parts, such as the separate plumbing and heating parts under the same base code. Several construction trades come in wage-split pairs, where each worker's regular hourly wage decides which classification the payroll goes to; the thresholds were updated for policies from September 1, 2026, and the same filing eliminated a few classifications. The California workers comp class codes page shows the published classifications that mention each trade's work, every threshold and a search of the full list.
These are published classifications that mention this kind of work. The right classification depends on the actual duties performed and the carrier’s determination; we do not assign or confirm class codes. The list is the WCIRB’s, checked November 3, 2026. For each class’s full wording and footnotes, use the WCIRB classification search.
Nevada classifies payroll under NCCI's system. The Division of Insurance posts the advisory loss cost files, which pair each code number with its loss cost but leave out the description of the work. Rather than borrow another publisher's wording, this site waits until a plain-language label for each Nevada code is approved before listing any. The Nevada industrial insurance for contractors page explains the payroll rules those codes are rated on. How to find and check the codes on your own policy is set out in Nevada workers comp class code lookup.
Arizona also uses NCCI classifications, but we have found no official public Arizona class list to send you to, so this site doesn't list Arizona codes. The carrier determines the classifications from the work your people do, and the declarations page of a current Arizona policy shows the codes in use. The Arizona contractor workers comp rules cover the statutory employer and owner rules that shape whose payroll is classified. Where to look a code up and how to ask for review are covered in Arizona workers comp class code lookup.
Restaurants and breweries follow the same steps; the restaurant workers comp insurance hub explains how kitchen, service and bar payroll is classified.
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For California, yes: the class page lists the published classifications whose titles mention each trade's work, and you can search the full list by number or keyword. That shows what is published, not which code fits your business; the carrier determines that from your duties.
Arizona and Nevada use NCCI's classification system, and California uses the WCIRB's own system. The numbers and titles were built separately, so a California code tells you nothing about the Arizona or Nevada code for the same work.
The carrier does, based on the work your people actually perform, and the audit can change it if the duties turn out to be different. A broker can explain the published classifications and pass along your job descriptions, but this site never assigns or confirms a code.
Look at the declarations page or the classification schedule of your current policy, or your last premium audit report. Each lists the codes with the payroll reported under them, which is the best starting point for a renewal or a new quote.
4 official sources, every one checked
Reviewed by David Gleason, Principal, on .
Next Level Experience. Insurance Done Right.
Workers comp class codes by state, and how to read the list for your trade.
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