What is Industry Classification?

Industry classification is a standardized system for categorizing businesses, organizations, and economic activities into groups based on their primary function or output. Companies are assigned specific codes according to what they mainly do—manufacturing goods, providing services, developing software, or selling retail products.

These systems create a common language that enables governments, investors, researchers, and businesses to analyze economic activity consistently. The goal is clear comparison, accurate reporting, and reliable analysis across industries, markets, and countries.

Why does Industry Classification matter?

Industry classification provides structure to economic analysis and business decision-making. Without standardized categories, comparing companies or tracking industry trends would be unreliable.

• Enables market and competitor analysis
• Supports investment comparison and risk assessment
• Improves economic and statistical reporting
• Allows benchmarking against industry peers
• Helps apply correct regulations and policies

How does Industry Classification work?

Industry classification follows a systematic process. First, a company’s primary economic activity is identified—usually the activity generating the most revenue.

This activity is matched to official definitions within a classification system. A numeric or alphanumeric industry code is then assigned and used in registrations, reporting, and analysis. Companies may be reclassified if their main business changes significantly.

• Identify primary business activity
• Match activity to official definitions
• Assign an industry code
• Use the code for reporting and analysis
• Update classification if the business evolves

Types of Industry Classification systems

• NAICS (North American Industry Classification System): Used in the US, Canada, and Mexico with six-digit codes
• SIC (Standard Industrial Classification): Older US system still referenced in some contexts
• GICS (Global Industry Classification Standard): Widely used in investment and financial analysis
• NACE: European Union classification system
• ISIC: United Nations system enabling global comparability

Where Industry Classification is used

• Market research and business strategy
• Investment and portfolio management
• Government statistics and regulation
• Business registration and tax compliance
• Economic and academic research