Concrete Work - Incidental to Construction of Private Residence
Concrete Construction - Floors, Drives, Yards, Walks
Concrete Construction - Bridges and Culverts
Swimming Pool Construction - Not Iron or Steel
Stone, Mosaic or Terrazzo or Ceramic Tile Work - Inside
Hothouse Erection
Carpentry NOC
Carpentry - Cabinet Work or Interior Trim
Installation of Locks/Lathing
Wallboard or Sheetrock Installation
Glazier - Away From Shop & Drivers
Asbestos Abatement Contractor
Asbestos Abatement Contractor - Pipe and Boiler Work Exclusively & Drivers
Concrete Construction NOC
Carpet, Linoleum, Vinyl, Asphalt or Rubber Floor Tile Installation
Insulation Work NOC & Drivers
Plastering NOC
Painting or Paperhanging
Heating, Ventilation, Air Conditioning Systems - Installation, Service & Repair & Drivers
Roofing - All Kinds
Contractors - General
Cleaners - Debris Removal
Carpentry - Detached One or Two-Family Dwellings
Carpentry - Dwellings Three Stories or Less
Building Raising or Moving
Salvage Operations - No Wrecking or Structural Operations
Dam or Lock Construction - All Operations
Pile Driving
Jetty, Breakwater, Dike, or Revetment Construction
Levee, Dam, or Lock Construction; Concrete Works, All Operations
Well Drilling - Water & Drivers
Oil or Gas Well - Specialty Tool Operation NOC, By Contractor
Oil or Gas Well - Perforating of Casing
Excavation/Grading
Irrigation or Drainage System Construction
Oil or Gas Pipeline Construction
Caisson Work - All Operations To Completion
Sewer Construction - All Operations
Gas/Water/Steam Mains or Connections Construction
Fence Erection - All Types
Railroad Construction
Boatbuilding - Wood NOC
Boat or Shipbuilding & Repair
Marina Operations
Boatbuilding or Repair - Fiberglass
Shipbuilding
Ship Cleaning/Ship Repair Conversion - All Operations
Livery or Boarding Stable - Not Sales Stables
Trucking NOC; Tow Trucks
Trucking; Oil Field Equipment, All Employees; Tow Trucks
Trucking; Local Hauling Only; Tow Trucks
Trucking; Long Distance Hauling; Tow Trucks
Trucking; Palletized Freight Only
Trucking - Mail, Parcel, or Package Delivery Under Contract
Stevedoring NOC
Coal/Ore Dock Operations & Stevedoring
Stevedoring; Containerized Freight
Freight Handling NOC
Drivers NOC
Beer or Ale/Wine Dealer - Wholesale & Driver
Gas Company - Gas Works and Sales
Gas Pipeline Operations
Waterworks Operation - Not Municipally Operated
Electric Light or Power Line Construction & Drivers
Garbage Works - Commercial Bulk, Non-Residential
Telephone Cable Laying - Specialist Contractor
Telephone or Cable TV Line Install - Overhead
Telecommunications Contractor - Initial Line Construction & Drivers
Burglar Alarm Installation or Repair/Telephone or Cable TV Line (inside)
Physicians & Surgeons
Store: Meat, Fish, or Poultry Dealer - Wholesale
Hospitals
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Common Questions
About workers' comp class codes
What is a workers' comp class code?
A workers' compensation class code is a 4-digit number that classifies each job based on its typical injury risk. Every employee at your business is assigned a class code, and each code has an associated rate (per $100 of payroll) that drives your workers' comp premium. Most states use NCCI class codes; California uses WCIRB codes with its own numbering for certain industries.
What is the difference between NCCI and WCIRB class codes?
NCCI (National Council on Compensation Insurance) maintains the workers' comp class code system used by 35 states plus DC. California uses its own rating bureau, WCIRB (Workers' Compensation Insurance Rating Bureau), which has proprietary codes for some industries — most notably restaurants and food service. WCIRB restructured its restaurant classifications in September 2024, replacing 9079 with codes 9080, 9081, 9082, 9083, 9084, and 9058.
How do I find the right class code for my business?
Start by identifying the primary work each employee actually performs — not just their job title. Use this lookup tool to search by keyword (e.g., "carpentry" or "restaurant") or browse by industry category. Because picking the wrong code can cost thousands in overpayment or leave claims uncovered, most businesses benefit from a licensed agent reviewing their classifications before submitting to carriers.
Can one business have multiple class codes?
Yes. Businesses with distinct operations typically split payroll across multiple class codes — for example, a construction company might classify field employees under a trade code (like 5403 for carpentry) and office staff under 8810 (clerical). Proper payroll splits require clear records separating the duties, and misclassification is a common audit finding.
Why is picking the right class code important?
Class code selection directly drives premium. Using a higher-rated code when a lower one applies means overpaying; using a lower-rated code than you should means an audit adjustment later, potential claim denials, or carrier cancellation. Roofing (5551), for example, can run 10x the rate of clerical work (8810) in the same state.