How to select the correct NAICS code
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Businesses are expected to self-select the NAICS code that most closely describes their main business activity. The NAICS Association has a helpful search option that will search possible NAICS codes based on keyword searching.
Many businesses have more than one revenue-producing line of business, so you can assign more than one NAICS code to your business.
Businesses can change their NAICS codes every 5 years, when the NAICS code is updated and industries are added or edited.