SIC codes are sets of four-digit codes used to classify what?

Standard Industrial Classification (SIC) codes are a standardized system used to classify business establishments by their primary type of economic activity. This numerical scheme, typically using four digits, categorizes companies into specific industries. Government agencies use these codes for statistical data collection and analysis of economic activity. In procurement and supply, professionals use SIC codes to identify potential suppliers, understand market structures, and conduct industry-level analysis to inform sourcing strategies. The classification is based on the principal product or service a company provides.

A. Business departments: SIC codes classify entire business entities based on their primary economic activity, not their internal functional units like finance or marketing.
B. Spend categories: Spend categories are an internal classification system used by a buying organization to group its expenditures, which is distinct from the external, standardized industry classification of SIC codes.
C. Countries: Countries are classified using different standardized codes, such as the ISO 3166 codes (e.g., US, GBR), not the industry-focused SIC system.

1. U.S. Securities and Exchange Commission (SEC). (n.d.). Standard Industrial Classification (SIC) Code List. Retrieved from https://www.sec.gov/corpfin/division-of-corporation-finance-standard-industrial-classification-sic-code-list.

Reference Point: The introductory text explicitly states, "The Standard Industrial Classification Codes... are used by the U.S. Securities and Exchange Commission (SEC) to classify companies by industry."

2. UK Government, Companies House. (2021, June 24). Standard industrial classification of economic activities (SIC). Retrieved from https://www.gov.uk/government/publications/standard-industrial-classification-of-economic-activities-sic.

Reference Point: The overview section explains that the SIC code is a 5-digit code (in the UK 2007 version) that "describes a company's nature of business" and provides a "description of the industry" it operates in.

3. Yale University Library. (n.d.). Company & Industry Information: Industry Codes. Retrieved from https://guides.library.yale.edu/c-i/industrycodes.

Reference Point: The guide states, "Standard Industrial Classification (SIC) codes are four-digit numerical codes assigned by the U.S. government to business establishments to identify the primary business of the establishment. The classification was developed to facilitate the collection, presentation, and analysis of data; and to promote uniformity and comparability in the presentation of statistical data collected by various agencies of the federal government, state agencies, and private organizations." This confirms its use for classifying businesses into industries for data analysis.