NIGP Code (National Institute of Governmental Purchasing)

NIGP Codes are a hierarchical commodity and service classification system developed by the National Institute of Governmental Purchasing, widely used by state, local, and education (SLED) government procurement offices as their primary system for categorizing purchases and managing vendor registration.

What are NIGP Codes?

NIGP Codes were developed by the National Institute of Governmental Purchasing (now the Institute for Public Procurement, or NIGP) as a standardized taxonomy for government purchasing. The coding system uses a five-digit structure: the first three digits identify the commodity or service class, and the last two digits specify the item within that class. For example, class 204 covers computer hardware, and item 20458 covers laptop computers. Some SLED systems use a seven-digit extension for even greater specificity.

Unlike NAICS codes, which classify business industry sectors, NIGP codes classify what is being purchased - similar in purpose to federal PSC codes but used in the SLED market rather than the federal market. Most state procurement portals and cooperative purchasing platforms require vendors to select the NIGP codes that describe their products and services during registration. Solicitations posted on these platforms are tagged with relevant NIGP codes, and vendors who have registered those codes receive automated notifications.

NIGP codes are used by many state procurement offices, county governments, school districts, housing authorities, and cooperative purchasing organizations. Platforms like BidNet Direct, DemandStar, and many state-specific portals organize their opportunity databases around NIGP codes. Vendors serious about SLED procurement need to understand which NIGP codes cover their offerings and ensure those codes are selected in every state and local system where they register.

Why NIGP matters for government contractors

For vendors targeting the SLED market, NIGP code selection is as strategically important as NAICS code selection in federal registration. Incorrect or incomplete NIGP code selection means missing automated notifications for relevant solicitations. State procurement offices also search their vendor databases by NIGP code when conducting sourcing research, so vendors not registered under relevant codes are invisible to buyers doing market research before a solicitation is developed.

Example

A commercial office furniture company targeting school district and municipal government customers registers in a state procurement portal and selects NIGP codes covering office furniture (715-41), educational furniture (220-77), classroom seating (220-60), and installation services for furniture (715-84). When the state education department issues an RFP for classroom furniture replacement across 40 schools, the solicitation is tagged with NIGP 220-77 and the company receives an automated email notification. Without accurate NIGP code registration, the notification would have gone only to competitors who had correctly registered those codes.

Frequently Asked Questions

Do I need NIGP codes if I already have NAICS codes in my SAM.gov registration?

Yes. NIGP codes and NAICS codes serve different markets. SAM.gov uses NAICS codes for federal procurement. SLED procurement portals - state, county, municipal, and education systems - typically use NIGP codes. To receive notifications and be found by SLED buyers, you need to register your NIGP codes in each relevant state and local system where you want to compete. NAICS codes in SAM.gov do not carry over to SLED portals.

How do I find the right NIGP codes for my products or services?

NIGP publishes its commodity and services code listing, which is available through NIGP's website and is licensed to many eProcurement platforms. The listing is searchable by keyword. Most state procurement portals that use NIGP codes provide a searchable code directory within their vendor registration interface. Start with keywords describing your product or service and review all matching codes and their descriptions to find the most accurate fits.

Are NIGP codes standardized across all states?

NIGP codes are a standardized national system, but individual states and localities may use the codes at different levels of granularity or may have adopted customized versions. Most states that use NIGP codes use the standard five-digit structure, while some use seven-digit extensions for greater specificity. When registering in a new state system, use the code directory provided by that specific system to ensure compatibility.

Is NIGP the same as UNSPSC?

No. NIGP and UNSPSC (United Nations Standard Products and Services Code) are two different commodity classification systems. NIGP is primarily used by US state and local governments. UNSPSC is an international standard used in global procurement contexts. Some US organizations and federal agencies use UNSPSC, but the majority of US SLED procurement systems use NIGP codes. Vendors may need familiarity with both if they sell internationally or to federal agencies that use UNSPSC.