How do I determine the appropriate NAICS code based on the SIC code?
Census provides detailed conversion (concordance) tables on its website here. Census provides spreadsheet files that can be used to cross-reference SIC codes with the corresponding 2002 NAICS code only. NAICS codes are reviewed and updated every five years; therefore, to ensure that you have the most current NAICS code, enter the 2002 NAICS code into Census’ “NAICS Search” on the left side of the webpage.