An IRS NTEE code is a three-character classification, one letter followed by two digits, that identifies what a registered nonprofit does. The National Center for Charitable Statistics developed the National Taxonomy of Exempt Entities, and the IRS uses it to sort every organization in its Exempt Organizations Business Master File by mission and primary activity. The code drives how your nonprofit shows up to grantmakers, on charity research platforms, and in government reports.
What the Three Characters Mean
The letter is the Major Group, the broadest bucket. The second character, a digit, narrows the organization into a specific activity area within that group. The third character narrows further into a particular type of organization.1National Center for Charitable Statistics. National Taxonomy of Exempt Entities (NTEE) Codes – Section: Structure of the NTEE-CC
A few examples make the pattern concrete. B20 is Elementary and Secondary Schools under the Education major group. E20 is Hospitals under Health. D20 is Animal Protection and Welfare under Environment and Animals. A20 covers Arts and Culture organizations that promote or provide access to visual, media, or performing arts.
An IRS technical publication describes the NTEE as a four-character code, with the fourth character providing an even finer subdivision, but most searching and filtering relies on just the first three.2Internal Revenue Service. Exempt Organizations Business Master File Extract – NTEE Codes
The Ten Broad Categories
All 26 letter-based major groups roll up into ten broad categories.1National Center for Charitable Statistics. National Taxonomy of Exempt Entities (NTEE) Codes – Section: Structure of the NTEE-CC
- Arts, Culture, and Humanities (A): museums, performing arts groups, media organizations, historical societies.
- Education (B): schools from preschool through university, libraries, student services.
- Environment and Animals (C, D): wildlife preservation, pollution control, botanical gardens, animal shelters.
- Health (E, F, G, H): hospitals, mental health services, disease research, substance abuse treatment.
- Human Services (I, J, K, L, M, N, O, P): the largest cluster, covering food banks, housing assistance, employment training, youth development, crime prevention.
- International, Foreign Affairs (Q): international development, relief, human rights.
- Public, Societal Benefit (R, S, T, U, V, W): civil rights, community improvement, philanthropy and voluntarism, scientific research.
- Religion Related (X): religious organizations and interfaith coalitions beyond individual congregations.
- Mutual/Membership Benefit (Y): labor unions, business leagues, fraternal organizations where the primary advantage flows to members rather than the public.
- Unknown, Unclassified (Z): a catch-all for organizations that don’t fit neatly elsewhere or haven’t been classified yet.
The split between Public/Societal Benefit and Mutual/Membership Benefit matters more than it looks. Public benefit entities serve the broader community; mutual benefit organizations exist primarily for their members’ interests. That difference can affect grant eligibility and how funders read the organization.
How Your Code Gets Assigned
Organizations don’t pick their own code. IRS determination specialists review the descriptive information in an application for tax-exempt status and assign the NTEE code based on what the organization actually does.3National Center for Charitable Statistics. National Taxonomy of Exempt Entities (NTEE) Codes Form 1023-EZ, the streamlined application for smaller 501(c)(3) organizations, does ask the applicant to enter the NTEE code that best describes their purpose.4Internal Revenue Service. Instructions for Form 1023-EZ
Full Form 1023 is the standard application for 501(c)(3) recognition, covering charities, educational institutions, religious organizations, and similar groups.5Internal Revenue Service. Instructions for Form 1023 Organizations seeking exemption under other 501(c) subsections, such as social welfare organizations, labor unions, or business leagues, file Form 1024 instead.6Internal Revenue Service. About Form 1024, Application for Recognition of Exemption Under Section 501(a) In each case, your narrative description of programs and activities is what the IRS specialist reads when choosing your code.
How to Look Up a Nonprofit’s NTEE Code
The IRS publishes the Exempt Organizations Business Master File (EO BMF), a downloadable dataset that includes the NTEE code for every registered exempt organization along with its name, address, ruling date, income, and assets.7Internal Revenue Service. Exempt Organizations Business Master File Extract The NTEE code appears as its own field.8Internal Revenue Service. Exempt Organizations Business Master File Extract – Field Descriptions
For a faster check, the IRS Tax Exempt Organization Search tool on irs.gov lets you look up a specific organization and view its filing information.9Internal Revenue Service. Tax Exempt Organization Search Third-party platforms like ProPublica’s Nonprofit Explorer and Candid (formerly GuideStar) display NTEE codes alongside financial data pulled from IRS filings, and they let you filter by NTEE category. That is how many donors and grantmakers actually search.
One caveat. Churches and certain other organizations that aren’t required to file an application for recognition of exemption won’t appear in the Business Master File unless they voluntarily filed one.8Internal Revenue Service. Exempt Organizations Business Master File Extract – Field Descriptions If you can’t find an NTEE code for an organization, that’s often why.
Why the Right Code Matters
A wrong NTEE code is not just a filing quirk. Grantmakers and corporate philanthropy programs routinely search by NTEE category to find organizations that match their funding priorities. A youth literacy nonprofit that ended up coded under Arts and Culture instead of Education may never surface in the right searches. Tax-exempt status isn’t at risk from a misclassification, but visibility to the funders that matter most is.
The code also shapes public perception. A donor checking a nonprofit on a research platform forms an immediate impression from the displayed category. A mismatch between the stated mission and the NTEE classification can raise questions that don’t need to exist.
How to Request a Code Change
If your organization has shifted its primary mission, or you realize the assigned code was inaccurate from the start, you can report the change. The IRS allows exempt organizations to report operational changes on their annual Form 990 or Form 990-EZ return.10Internal Revenue Service. Exempt Organizations – Reporting Changes to IRS Updating the description of activities on that annual return is the most common way to flag a shift in mission that might warrant reclassification.
For changes beyond what the annual return captures, organizations can contact the IRS Exempt Organizations division directly. Understand what the change is and what it isn’t. An NTEE code update is an internal classification change to the Business Master File. It is not a change in your underlying tax-exempt status, and the IRS does not issue a new determination letter simply because your NTEE code moves from one category to another. Determination letters confirm exempt status under a specific section of the Internal Revenue Code, which is a separate question from what activity category you fall into.
Some outside sources claim the IRS processes code changes within 30 to 90 days and sends an updated determination letter. No IRS source confirms either detail. The timing depends on current processing backlogs, and confirmation comes through the updated Business Master File record.
NTEE Codes vs. NAICS Codes
NTEE codes exist specifically for the nonprofit sector and classify organizations by mission. The North American Industry Classification System (NAICS), which the federal government uses to categorize all businesses and organizations by economic activity, is a different system. A hospital would have both an NTEE code (E20, under Health) and a NAICS code (622110, for general medical and surgical hospitals), but the two serve different purposes.
Nonprofits don’t self-report NAICS codes the way for-profit businesses do. When one is attached to a nonprofit, it’s usually assigned by a third party for analytical purposes. The NTEE code is the classification that lives in your IRS record and drives how grantmakers and charity research platforms find you.