Find accurate NAICS code and SIC codes for your business using our identification tools and services. Contact NAICS Association Today

This list provides each principal business activity with its associated IRS code designed to classify an enterprise by type of activity.

The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and …

Business Activity Codes The codes listed in this section are a selection from the North a code for the activity you are trying to categorize, select the (beginning with 90) are not part of the NAIC system …

Oct 29, 2025 · List of activities and codes determine from which activity the business derives the largest percentage of its “total receipts.” Also known as IRS Business Codes.

Find NAICS codes with our free lookup tool. Search by industry name, business example, alternate name or filter by business sector.

Select the most specific 6-digit code available that describes the activity producing the income being reported. Note that most codes describe more than one type of activity.

To find the NAICS code that best fits your business, use the NAICS code lookup tool on this page. Enter a keyword that describes your business type, and a list of relevant primary business activities along …

The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and …

When you apply for an Employer Identification Number (EIN) for your business, you'll need to select a business code that best describes your primary business activity.