
CMMC requirements flow down through the entire defense supply chain. As a subcontractor, your prime contractor's compliance depends on yours. Understanding your specific requirements and preparing proactively protects your business and your position in the supply chain.
Understanding whether you handle FCI (Level 1) or CUI (Level 2) based on your subcontract requirements and the data you receive from primes.
Some prime contractors provide incomplete guidance on what CMMC level is required or what constitutes CUI in your specific context.
Many subcontractors are small businesses with limited IT budgets and no dedicated security staff.
Subcontractors working with multiple primes may face varying CMMC requirements and timelines across different contracts.
Uncertainty about what data received from prime contractors qualifies as CUI and triggers Level 2 requirements.
CUI shared via unencrypted email between prime and subcontractor without adequate protection during transmission.
Lack of controls on personal devices that may access CUI, especially in small businesses with BYOD practices.
Including preparation, tooling, and assessment fees
Depending on current maturity and scope
Subcontractor CMMC costs depend primarily on the required level. Level 1 (self-assessment for FCI only) can be achieved for $15K-$50K. Level 2 (C3PAO assessment for CUI) typically costs $100K-$200K including preparation and assessment. Focus on clearly defining your scope first — many subcontractors initially overestimate what's in scope.

Illumen specializes in helping subcontractors companies achieve CMMC compliance — from initial assessment through certification.
Know exactly where you stand against requirements
A clear, prioritized path to certification
Hands-on support from seasoned compliance advisors
Common questions about CMMC compliance in the subcontractors industry.