Learn About NAICS Code Resources

Understanding NAICS Codes and Their Purpose

The North American Industry Classification System, commonly known as NAICS, is a standardized system used to classify businesses by the type of economic activity they perform. The U.S. Census Bureau, in partnership with Statistics Canada and Mexico's statistical agency, created this system to organize business data across North America. Each business receives a specific NAICS code that describes what that business does.

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NAICS codes consist of six digits, and each digit provides more specific information about the business. The first two digits identify the broad industry sector, the third and fourth digits narrow down to the industry group, and the fifth and sixth digits provide the most specific classification. For example, a code might start with 31, indicating manufacturing, then become more specific with each additional digit until it identifies a particular type of manufacturing operation.

The system replaced the older Standard Industrial Classification (SIC) system in 1997 and has been updated periodically to reflect changes in the economy. The most recent comprehensive update occurred in 2022, with codes adjusted to account for new industries and business models that didn't exist in previous decades. This includes classifications for businesses involved in cryptocurrency, e-commerce platforms, and other modern economic activities.

Governments, statistical agencies, and researchers use NAICS codes to collect and organize business data. Banks, lenders, and insurance companies reference these codes when evaluating businesses. Understanding your business's NAICS code matters because it affects how your business is classified for data collection and analysis purposes. Different agencies and organizations may reference your NAICS code when gathering information about industry trends, employment patterns, and economic activity.

Practical Takeaway: Knowing your business's NAICS code helps you understand how your industry is officially classified and where your business fits within the larger economy. This knowledge allows you to find industry-specific data and understand how your business compares to similar operations.

Where to Find Official NAICS Code Resources

The U.S. Census Bureau maintains the official NAICS website at www.census.gov/naics, which serves as the primary resource for NAICS information. This website contains the complete NAICS structure, detailed definitions for each code, and historical information about how classifications have changed over time. The site is organized by industry sector, allowing users to browse through different business categories.

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The Census Bureau offers several tools for searching NAICS codes. The NAICS search tool on their website allows you to enter keywords related to your business and receive matching codes. You can search by business activity, product type, or industry name. The search results show the specific code and a detailed description of what businesses fall under that classification.

The Census Bureau also publishes the NAICS Manual, which contains the complete classification structure along with detailed explanations of what activities fall within each code and what activities are excluded. This manual is available as a PDF download from the Census Bureau website. The manual includes examples of businesses that would receive specific codes, which helps clarify the differences between similar classifications.

Additionally, the NAICS website provides conversion tables that show how old SIC codes correspond to current NAICS codes. This resource proves useful for businesses that have used SIC codes historically and need to understand how their classification has changed. The website also includes information about which codes have been added, modified, or eliminated in recent updates.

The Census Bureau maintains an email contact option for businesses with specific questions about their NAICS classification. While response times vary, this resource provides a way to get direct answers about whether a particular business activity falls under a specific code. Many state economic development agencies and small business development centers also maintain information about NAICS codes and can provide guidance.

Practical Takeaway: Start your search for NAICS information at the Census Bureau's official website. Use the search tools and manual to understand how your business is classified, and contact the Census Bureau if you have specific questions about borderline cases or unclear classifications.

How NAICS Codes Are Structured and Organized

The NAICS structure uses a hierarchical system where codes become progressively more specific. At the broadest level, the first two digits identify the sector. There are 20 major sectors in the NAICS system, ranging from agriculture to public administration. Sectors like manufacturing, retail trade, professional services, and healthcare represent large groupings of related businesses.

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The third and fourth digits identify the subsector and industry group. At this level, manufacturing might break down into food manufacturing, beverage manufacturing, textile manufacturing, and so on. Each of these industry groups contains multiple related types of businesses. For instance, food manufacturing includes bakeries, meat processing, beverage production, and other food-related operations.

The fifth and sixth digits provide the most detailed classification, identifying the specific industry. This is where a general category like "food manufacturing" becomes something much more specific, such as "commercial bakeries" or "animal slaughtering and processing." These detailed codes allow researchers and analysts to study very specific types of economic activity.

Each code comes with a detailed definition that explains exactly what activities fall under that classification. These definitions specify what types of products the business makes, what services it provides, or what activities it performs. The definitions also include exclusions—activities that might seem like they belong in a category but are actually classified elsewhere. Understanding these exclusions prevents businesses from receiving the wrong classification.

The hierarchy allows for analysis at multiple levels. Researchers can look at broad trends across entire sectors or zoom in to study specific industries. A government agency might track employment across all manufacturing, but a trade association might focus on the specific codes that represent their industry. This flexibility makes NAICS useful for many different purposes.

Practical Takeaway: Understanding the six-digit structure helps you navigate NAICS classifications. Start with the broadest two digits to identify your sector, then move through progressively more specific digits until you find the code that matches your business's primary activity.

Using NAICS Codes for Business Analysis and Research

NAICS codes serve as the foundation for numerous government reports and statistics about business activity. The Census Bureau uses NAICS codes to organize data from the Economic Census, which is conducted every five years and provides detailed information about business establishments, employment, and economic output by industry. Companies, researchers, and policymakers use this data to understand industry trends and economic health.

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The Bureau of Labor Statistics publishes employment data organized by NAICS codes. These reports show how many people work in each industry, what wages are typical, and how employment levels change over time. Industry professionals use this information to understand labor market trends. Job seekers might use NAICS data to research average salaries in their field. Policymakers use the data to identify industries experiencing growth or decline.

Business researchers use NAICS classifications to identify competitors and industry peers. By finding businesses with the same or similar NAICS codes, researchers can gather information about typical business sizes, revenue levels, and operational characteristics in that industry. Trade associations often organize their membership around NAICS codes, making it easier to find industry-specific resources and professional networks.

Financial institutions use NAICS codes to understand business risk profiles. Banks and lenders often have different lending standards for different industries. A code might indicate that a business operates in a stable, mature industry or in a growing, volatile sector. Insurance companies use NAICS codes to determine risk levels and set premiums. A business's classification affects not only how lenders view the business but also what insurance costs might look like.

Regulatory agencies use NAICS codes to organize their oversight activities and target industries for compliance monitoring. Different industries face different regulatory requirements, and NAICS codes help agencies focus their resources on the industries they oversee. Economic development agencies use NAICS data to identify which industries are strong in their region and which sectors might benefit from development support.

Practical Takeaway: Use NAICS codes to research your industry's characteristics, including typical business sizes, employment levels, wage ranges, and growth trends. This information helps you understand your competitive landscape and benchmark your business against industry standards.

Finding Your Business's NAICS Code

The first step in finding your business's NAICS code is to identify your primary business activity. The NAICS system focuses on what a business primarily does, not all activities it might engage in. Many businesses perform multiple activities, but each business receives a code based on its principal or primary activity—the activity that generates the most revenue or is the main focus of the business.

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To determine your primary activity, consider what your business is fundamentally in business to do. A restaurant that also sells packaged goods receives a code based on food service