Why this article on CUI vs. FCI matters
If you’re a prime, a sub, or an overwhelmed SMB in the Defense Industrial Base (DIB), your CMMC journey starts with one decision: What data are we protecting – Federal Contract Information (FCI), Controlled Unclassified Information (CUI), or both? Get this wrong and everything downstream – scope, controls, budget, tools, even your chances at award – will be off. The good news: you can make this call with clear, objective criteria grounded in FAR 52.204‑21 (FCI) and 32 CFR Part 2002 (CUI), along with DoD and NIST guidance.
Quick CUI vs. FCI definitions (plain English)
- FCI (Federal Contract Information)
Information not intended for public release that the Government provides to you or that you generate under a Federal contract to deliver a product or service. If it’s on a public website or simple payment data, it’s not FCI. Think SOWs, deliverable drafts, CO emails, project plans. FCI invokes FAR 52.204‑21 and its 15 basic safeguards. - CUI (Controlled Unclassified Information)
Unclassified information that Federal law/regulation/policy requires or permits safeguarding or limited dissemination. It is created or possessed by the Government, or by you for/on behalf of the Government. CUI is standardized under the government‑wide CUI Program and cataloged in the CUI Registry; DoD also maintains a DoD‑specific registry. In DoD contracts, CUI generally triggers DFARS 252.204‑7012 and NIST SP 800‑171 implementation.
Practical rule of thumb: If it’s just contract‑related but not public, it’s probably FCI. If a law/regulation/policy says it needs protection (e.g., export control, Controlled Technical Information (CTI), Personally Identifiable Information (PII) tied to a DoD purpose), it’s CUI – check the registry category and your contract.


