Translate this page to any language by choosing a language in the box below.
The U.S. Standard Industrial Classification (SIC) system was the older way of classifying businesses to provide new comparability in statistics about business activity across North America. In 2002, the North American Industry Classification System (NAICS) replaced the U.S. SIC system. NAICS is used in the U.S., Canada, and Mexico and is expected to help reshape the way we view our changing economy (i.e., NAFTA, etc.)
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 publishing statistical data related to the U.S. business economy. NAICS was developed under the auspices of the Office of Management and Budget (OMB), and adopted in 1997 to replace the Standard Industrial Classification (SIC) system . It was developed jointly by the U.S. Economic Classification Policy Committee (ECPC) , Statistics Canada , and Mexico's Instituto Nacional de Estadistica y Geografia , to allow for a high level of comparability in business statistics among the North American countries. For help; contact the NAICS at Census.gov: [email protected]
This official U.S. Government Web site provides the latest information on plans for NAICS revisions, as well as access to various NAICS reference files and tools. Additional information on the background and development of NAICS is available in the History section of this Web site.
Click here to download the entire 2022 NAICS manual for free.
The following table provides detailed information on the structure of NAICS.
|11||Agriculture, Forestry, Fishing and Hunting|
|21||Mining, Quarrying, and Oil and Gas Extraction|
|48-49||Transportation and Warehousing|
|52||Finance and Insurance|
|53||Real Estate and Rental and Leasing|
|54||Professional, Scientific, and Technical Services|
|55||Management of Companies and Enterprises|
|56||Administrative and Support and Waste Management and Remediation Services|
|62||Health Care and Social Assistance|
|71||Arts, Entertainment, and Recreation|
|72||Accommodation and Food Services|
|81||Other Services (except Public Administration)|
To easily convert a single SIC to NAICS, OR a single NAICS code to SIC, click here OR see below for a comprehensive table.
View or download this publication
Conversion from the SIC codes system to the newer NAICS system began (mostly) in 2001, 2002) See the table below for conversion dates.
|Agency||Conversion Reference Period|
|U.S. Census Bureau||varies, see list|
|Bureau of Economic Analysis||varies, see list|
|Bureau of Labor Statistics||varies, see list|
|Internal Revenue Service||1999|
|Small Business Administration||Oct 1, 2000, see statement|
If you would like to see the older SIC code list, click here!
To locate either an NAICS code or an industry, just click on the "Find in Page" function in your browser (in Netscape, just click on "edit" then "find in page") and enter the code or industry you're looking for.
NAICS 2002 is the same as NAICS 1997 for fourteen of the twenty sectors. Construction and wholesale trade are substantially changed, but the revisions also modify a number of retail classifications and the organization of the information sector. Very minor boundary adjustments affect administrative and support services and mining.
A Federal Register notice (January 16, 2001) documents the final adoption of the revisions.
The printed NAICS 2002 manual is available from NTIS .
All of the titles, definitions, and index terms are accessible here.
|2002 NAICS United States Structure|
|Code list, full hierarchy, 2- through 6- digits||Drill down hypertext||ASCII (103kb)|
|Code list, 6-digit codes only||Drill down hypertext||ASCII (54kb)|
|Correspondence Tables :||Drill down hypertext||Downloadable Spreadsheets|
|Table 1||2002 NAICS-US Matched to 1997 NAICS-US||xls (1.3mb)||zip (129kb)|
|Table 2||1997 NAICS-US Matched to 2002 NAICS-US|
|Table 3||2002 NAICS-US Matched to 1987 Standard Industrial Classification||xls (386kb)||zip (105kb)|
|Table 4||1987 Standard Industrial Classification Matched to 2002 NAICS-US|
Note 1: Tables 1 and 2 in hypertext include only those industries with 1997-2002 changes; downloadable spreadsheet includes all industries.
|Other Resources:||Drill down hypertext||Downloadable Files|
|NAICS 2002 definitions||
zipped txt (252kb)
|NAICS 2002/1997 index entries||csv (2.2mb)||zipped csv (439kb|
The North American Industry Classification System (NAICS, pronounced Nakes) was developed under the direction and guidance of the Office of Management and Budget (OMB) as the standard for use by Federal statistical agencies in classifying business establishments for the collection, tabulation, presentation, and analysis of statistical data describing the U.S. economy. Use of the standard provides uniformity and comparability in the presentation of these statistical data. NAICS is based on a production-oriented concept, meaning that it groups establishments into industries according to similarity in the processes used to produce goods or services. NAICS replaced the Standard Industrial Classification (SIC) system in 1997.
NAICS was initially developed and subsequently revised by Mexico's INEGI, Statistics Canada, and the U.S. Economic Classification Policy Committee (the latter acting on behalf of OMB). The goal of this collaboration was to produce common industry definitions for Canada, Mexico, and the United States. These common definitions facilitate economic analyses of the economies of the three North American countries. The statistical agencies in the three countries produce information on inputs and outputs, industrial performance, productivity, unit labor costs, and employment. NAICS, which is based on a production-oriented concept, ensures maximum usefulness of industrial statistics for these and similar purposes.
NAICS in the United States was designed for statistical purposes. However, NAICS is frequently used for various administrative, regulatory, contracting, taxation, and other non-statistical purposes. For example, some state governments offer tax incentives to businesses classified in specified NAICS industries. Some contracting authorities require businesses to register their NAICS codes, which are used to determine eligibility to bid on certain contracts. The requirements for these non-statistical purposes played no role in the initial development of NAICS or its later revisions.
Various agencies and organizations also use NAICS as a basis for their procurement programs, requiring that a NAICS code be provided for each good or service to be procured. NAICS is an industry classification system, not a product classification system, and therefore neither intended nor well suited for this purpose. The North American Product Classification System (NAPCS) was developed under the direction and guidance of OMB and also in collaboration with Canada and Mexico. This system incorporates all of the outputs/products of the industries defined in NAICS, with "product" referring to goods produced and services provided. For statistical purposes, a business establishment is assigned one NAICS code, based on its primary business activity, whereas multiple NAPCS codes can be linked to any one establishment to indicate its various products.
An establishment is generally a single physical location where business is conducted or where services or industrial operations are performed (e.g., factory, mill, store, hotel, movie theater, mine, farm, airline terminal, sales office, warehouse, or central administrative office). An enterprise, on the other hand, may consist of one or more locations that are more than 50 percent owned by the same entity performing the same or different types of economic activities. Each establishment of that enterprise is assigned a NAICS code, based on its own primary business activity.
The U.S. Census Bureau and other Federal statistical agencies collect, tabulate, present, and analyze data about the economy of the United States. For an example, please visit the Business and Industry Web site.
Ideally, the primary business activity of an establishment is determined by relative share of production costs and/or capital investment. In practice, other variables, such as revenue, value of shipments, or employment, are used as proxies. The U.S. Census Bureau generally uses revenue or value of shipments to determine an establishment's primary business activity.
NAICS is a 2- through 6-digit hierarchical classification system, offering five levels of detail. Each digit in the code is part of a series of progressively narrower categories, and the more digits in the code signify greater classification detail. The first two digits designate the economic sector, the third digit designates the subsector, the fourth digit designates the industry group, the fifth digit designates the NAICS industry, and the sixth digit designates the national industry. The 5-digit NAICS code is the level at which there is comparability in code and definitions for most of the NAICS sectors across the three countries participating in NAICS (the United States, Canada, and Mexico). The 6-digit level allows for the United States, Canada, and Mexico each to have country-specific detail. A complete and valid NAICS code contains six digits.
Within the official NAICS classification system, U.S. industries are defined at the 6-digit level. Any codes greater than six digits that are labeled as "NAICS codes" are not truly NAICS codes, but perhaps should be labeled "NAICS-based codes". Any such codes would probably be proprietary to the agency or organization that created them for their own programmatic purposes, and should not be assumed to be consistent or comparable across agencies.
For use in its economic census and survey programs, the U.S. Census Bureau has developed several NAICS-based coding systems. One is the discontinued Numerical List of Manufactured and Mineral Products, which was a 10-digit product classification system containing products produced by the manufacturing and mining industries. The first six digits of the 10-digit product code is the 6-digit NAICS code of the manufacturing or mining industry that is designated as the primary producer of the product. View the 2002 Numerical List , 2007 Numerical List , or the 2012 Numerical List . Note that the Numerical List will be replaced by products based on the North American Product Classification System in the 2017 Economic Census and subsequent survey programs.
Another example of NAICS-based codes used in the Economic Census, which appear on the reporting instruments and in disseminated data, are the 7- and 8-digit "kind of business codes". These codes are used for certain industries to provide finer details of the principle business activities below the 6-digit NAICS industry level.
To view a complete list of 2017 NAICS Sector codes and titles, visit the "Downloads/Reference Files/Tools " section of this Web site. Under "2017 NAICS," you can download an Excel file of either the complete NAICS code hierarchy, ranging from broad 2-digit Sector codes to specific 6-digit U.S. Industry codes, or a list of just the 6-digit U.S. Industry codes.
NAICS replaced the SIC in 1997. Federal statistical agencies use NAICS for the collection, tabulation, presentation, and analysis of economic statistics. There will be no further revisions of the SIC, which was last updated in 1987. It is possible that other organizations and state and local agencies are continuing to use the SIC for their own purposes, but these non-statistical uses are outside the scope of the Federal economic statistical programs.
To find the SIC codes and their descriptions, visit the Occupational Safety & Health Administration (OSHA) Web site, which maintains a SIC Manual .
To learn more about the differences between the original 1997 NAICS and the SIC, visit the "History" link on this Web site.
A detailed conversion (concordance) between the SIC and 2002 NAICS is available in Excel format for download at the "Concordances" link on this Web site. There are no plans to develop other concordances between the SIC and NAICS.
There is no central government agency with the role of assigning, monitoring, or approving NAICS codes for establishments. Individual establishments are assigned NAICS codes by various agencies for various purposes using a variety of methods. The U.S. Census Bureau has no formal role as an arbitrator of NAICS classification.
The U.S. Census Bureau assigns one NAICS code to each establishment based on its primary activity (generally the activity that generates the most revenue for the establishment) to collect, tabulate, analyze, and disseminate statistical data describing the economy of the United States. Generally, the U.S. Census Bureau's NAICS classification codes are derived from information that the business establishment provided on surveys, census forms, or administrative records.
Various other government agencies, trade associations, and regulation boards adopted the NAICS classification system to assign codes to their own lists of establishments for their own programmatic needs. If you question the NAICS code contained on a form received from an agency other than the U.S. Census Bureau, you should contact that agency directly.
There is no "official" way to have a company's NAICS code changed and there is no central register that represents the "official" NAICS classification for business establishments. Various Federal government agencies maintain their own directories of business establishments, and assign classification codes based on their own needs. Generally, the classification codes are derived from information that the business establishment has provided on surveys, forms, or administrative records. For this reason, we recommend that you contact the agency that has assigned the code that you believe should be changed. For example, if you question the NAICS code contained on a form received from the Occupational Safety and Health Administration (OSHA), you should contact the Department of Labor. For access to a list of Federal government agencies' Web sites, visit www.usa.gov/Agencies/Federal/All_Agencies/index.shtml.
NAICS is scheduled to be reviewed every 5 years for potential revisions, so that the classification system can keep pace with the changing economy. This is the only time that new NAICS codes can be considered. See the NAICS Update Process Fact Sheet [PDF 37KB] for more information.
There were 1,065 industries in 2012 NAICS United States, and in 2017 NAICS United States there are 1,057 industries. For 2017, revisions were made to address changes in the economy. These included the addition of new and emerging industries, content revisions for selected areas, title changes, and clarification of a few industry definitions.
Noticeable changes were made to six of the 20 NAICS sectors during the 2017 revision of NAICS. These sectors are listed below:
NAICS is scheduled to be reviewed every five years for potential revisions, so that the classification system can keep pace with the changing economy. See the NAICS Update Process Fact Sheet [PDF 37KB] for more information.
In the process of collecting, tabulating, analyzing, and disseminating statistical data, the U.S. Census Bureau assigns and maintains only one NAICS code for each establishment based on its primary activity (generally the activity that generates the most revenue for the establishment). Since other agencies and organizations have adopted NAICS for use in programs that are not statistical (e.g., regulatory activities and procurement), it is possible that they allow for more than one NAICS code per establishment. For instance, the System for Award Management (SAM), where businesses register to become federal contractors, will accept multiple classification codes per establishment. You will need to contact these other agencies to find out what their policies are, and what NAICS codes are appropriate for your business relative to their programs. For access to a list of Federal government agencies, visit www.usa.gov/Agencies/Federal/All_Agencies/index.shtml.
NAICS was developed for use in the collection, tabulation, analysis, and dissemination of statistical data that show the economic status of the United States. The NAICS categories and definitions were not developed to meet the needs of procurement or regulatory applications. However, other Federal agencies, trade associations, and regulation boards have adopted NAICS to use for procurement and regulatory purposes even though it is not well suited to meet their specific needs. The U.S. Census Bureau has no formal role as an arbitrator of classification decisions outside of Census Bureau programs. For questions regarding other agencies' uses of the NAICS system, contact the specific agency. For access to a list of Federal government agencies, visit www.usa.gov/Agencies/Federal/All_Agencies/index.shtml.
NAICS categories do not distinguish between small and large business, or between for-profit and non-profit. The Small Business Administration (SBA) developed size standards for each NAICS category. To find more information about the SBA size standards, visit www.sba.gov/content/small-business-size-standards. You may also contact SBA's Office of Size Standards on 202-205-6618 or via email at [email protected].
The NAICS system is used to classify establishments according to their primary activity. It is not a system for classifying occupations. The Bureau of Labor Statistics maintains the Standard Occupational Classification (SOC) system. For information on that system, go to www.bls.gov/soc/home.htm.
There are numerous economic statistical programs at the U.S. Census Bureau that publish data on a NAICS basis, at varying levels of detail. Links to these data sets are at www.census.gov/econ/.
Data on international trade in goods are collected on a commodity basis, whereas NAICS data are on an establishment basis. Commodity groups approximating the NAICS categories were developed, however, using the Harmonized System (HS)-North American Industry Classification System (NAICS) Concordance. For additional information, please visit the Foreign Trade Statistics Web site at www.census.gov/foreign-trade/index.html.
The North American Product Classification System (NAPCS) is a complementary system to NAICS. Whereas NAICS focuses on the input and production processes of industries, NAPCS classifies all the outputs of the industries defined in NAICS.
The objective of NAPCS is to have a market-oriented, or demand-based, classification system for products that (a) is not industry-of-origin based but can be linked to the NAICS industry structure, (b) is consistent across the three NAICS countries, and (c) promotes improvements in the identification and classification of service products across international classification systems, such as the Central Product Classification System of the United Nations. For more information visit the NAPCS Web site .
Title 13, U.S. Code, Section 9 (a) prohibits the U.S. Census Bureau from disclosing individual company activities including NAICS and SIC codes. More information on Title 13 can be found at www.census.gov/about/policies/privacy/data_protection.html.
Although the 2017 NAICS Manual is not available in hard copy, it can be downloaded from this Web site for free. Additionally, NAICS definitions, index files, and other components of the 2017 and earlier NAICS manuals are available for free in a variety of formats from the "Downloads/Reference Files/Tools " section of this Web site.
NAICS has been correlated to the International Standard Industrial Classification (ISIC) from the United Nations and to the General Industrial Classification of Economic Activities with the European Communities (NACE). To see or download these correlations, visit the "Concordances" link on this Web site.
NAICS was developed to classify business establishments within the United States, Canada, and Mexico for statistical purposes. If a company has both domestic and foreign locations, only the domestic locations would be assigned NAICS codes for statistical purposes.
If your question isn't listed here, send an email to [email protected]. Please include your telephone number in your email message in case we need to call you for more information.