NCCI Class Code
Definition. NCCI Class Codes are 3-4 digit classifications maintained by the National Council on Compensation Insurance that match employee duties to Workers Comp rates.
Also known as: NCCI Code, WC Class Code
700+ classes exist. Class code is the single biggest WC premium driver — often more than the carrier. Examples: 8810 Clerical ($0.20-$0.50/$100 payroll), 5183 Plumbing ($4-$7), 5551 Roofing ($10-$20+). Misclassified payroll is the #1 source of WC over-billing.
Example
An office worker mistakenly classified as a roofer (class 5551 at $15/$100) instead of clerical (class 8810 at $0.30/$100) results in 50× over-billing on their portion of payroll.
Sources cited
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Reviewed by California-licensed Property & Casualty insurance agent
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