What it means
Workers compensation premium is calculated by applying a rate to each 100 of payroll in each classification. Each classification code describes a type of business or job, such as clerical office work or a particular construction trade.
California uses its own classification system maintained by the WCIRB, while many other states use NCCI codes. Codes and rates in one state may not match another.
Getting classifications right matters. A worker placed in the wrong code can lead to underpayment that surfaces at audit, or to overpayment that goes unnoticed. In California, some construction classifications also depend on the employee’s hourly wage.
An example
Northstar Cabinetry has shop employees who build cabinets and installers who work at client sites. The audit places them in different classification codes, because shop work and installation work carry different rates.
Names in this example are fictional.
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Can one employee be split between two classification codes?
Sometimes, but the rules are strict. In general, employees are assigned to the classification that describes their work, and splitting payroll usually requires detailed records showing time spent in each type of work. California has its own rules for when division is allowed. Ask the insurer or a broker before relying on a split.
What happens if my business is misclassified?
A wrong code can mean paying too much or too little. Underpayment usually shows up at audit as an additional premium bill. Overpayment may continue for years unless someone checks. If you think the classification is wrong, ask the insurer to review it. In California the WCIRB also has a process for classification disputes.
General information only. It is not legal or insurance advice. Only issued policy documents and endorsements describe actual coverage.