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Query Commercial Classification Code

ISO’s Query Commercial Classification Code (QC3) is a tool utilizing cross-references

  • Workers Compensation codes to General Liability codes, including state specials
  • Workers Compensation codes to SIC and NAICS
  • General Liability codes to Workers Compensation codes, including state specials
  • General Liability codes to SIC and NAICS
  • The tool also provides

  • Workers Compensation classification phraseologies, including state specials
  • General Liability classification phraseologies, including state specials
  • Each WC/GL codes identifies the states where the code is applicable


  • Additionally, the tool has search capabilities directed to the SIC and NAICs websites. Insurance underwriters, actuaries, and agents can easily search for the information needed when writing a commercial account. A further explanation of the classification is available through a partnership with ISO’s Premium Audit Advisory Service (PAASR).


    For product information, click on a link below.

    Workers Compensation QC3

    General Liability QC3

    User Guide