CMMC vs FedRAMP Cost: $50K-$500K vs $250K-$3M

The two frameworks at a glance

CMMC (Cybersecurity Maturity Model Certification) is a DoD acquisition policy framework run by the DoD CIO with technical accreditation through the Cyber AB. Its purpose is to verify that defense contractors who handle Federal Contract Information (FCI) or Controlled Unclassified Information (CUI) actually implement the security controls they claim. The final rule sits at 32 CFR Part 170, effective December 16, 2024, with phased contract enforcement running through November 2028. Authority chain: DoD acquisition contracts contain a DFARS clause (252.204-7021) that requires the contractor to hold a current CMMC certification at the level the solicitation specifies.

FedRAMP (Federal Risk and Authorisation Management Programme) is a government-wide programme run by GSA that authorises cloud service offerings (CSOs) to be sold to federal agencies. The technical baselines are derived from NIST SP 800-53, with three impact tiers (Low, Moderate, High). The audit process is run by an accredited Third Party Assessment Organisation (3PAO) and the authorisation is granted by either an agency Authorising Official (the Agency Authorisation path) or the Joint Authorisation Board (the JAB authorisation path). The public marketplace is at marketplace.fedramp.gov, where you can verify the status of any authorised cloud service.

The audiences are different. CMMC applies to over 200,000 contractors in the Defense Industrial Base, ranging from one-person sub-contractors all the way to the primes. FedRAMP applies to roughly 350 authorised cloud service providers selling to roughly 75 federal agencies. CMMC is an obligation on the buyer of cloud (the contractor); FedRAMP is an obligation on the seller of cloud (the CSP). The two frameworks meet when a defense contractor uses a cloud service to handle CUI, at which point the contractor inherits some FedRAMP-authorised controls and the CSP gains a defense customer.

Cost side-by-side

CMMC numbers from cmmccost.com/level-2-cost. FedRAMP numbers from fedrampcost.com, anchored to the GSA-published FedRAMP authorisation playbook.

Why the cost gap is so wide

Three factors explain the 5-10x cost differential. First, control depth. CMMC Level 2 maps to the 110 controls in NIST SP 800-171 Rev 2 (and the 80 controls in Rev 3 once that transition completes). FedRAMP Moderate maps to roughly 325 controls drawn from NIST SP 800-53 Rev 5. More controls means more documentation, more evidence, more assessor time, more remediation budget.

Second, continuous monitoring. CMMC requires a triennial reassessment plus an annual affirmation in SPRS. FedRAMP requires monthly POA&M updates, monthly scans, weekly vulnerability metrics, and an annual assessment by the 3PAO. That continuous-monitoring cadence is one of the biggest single line items, often $200K-$600K per year, because someone has to actually produce and review those deliverables.

Third, audience scale. A CMMC certification protects the data of one contractor. A FedRAMP authorisation protects the data of every federal agency that adopts the service. The risk multiplier means the GSA's Joint Authorisation Board (and individual Agency Authorising Officials) require deeper independent assurance. The 3PAO penetration tests are more rigorous, the SAR is longer, the AO review takes months not weeks.

Control set overlap

The two frameworks share a lot of common ground because both derive from NIST publications. The DoD CIO Cloud Computing Security Requirements Guide (CC SRG) and the FedRAMP Moderate baseline are aligned at the technical level for CSPs serving DoD. Practitioner mapping shows roughly 70-80 percent of NIST 800-171 controls have a direct or strongly-overlapping FedRAMP Moderate equivalent. The remainder are CUI-specific (NIST 800-171 emphasises CUI marking, training, and dissemination controls that are not as prominent in 800-53).

For organisations holding both, the practical pattern is to author one consolidated control catalogue with cross-references back to each framework's identifiers. This is sometimes called a unified control framework approach. It avoids re-authoring evidence for each audit. The Cloud Security Alliance Cloud Controls Matrix and NIST OSCAL initiatives are both intended to support this kind of cross-framework reuse.

Inheritance: how FedRAMP reduces CMMC cost

The 32 CFR Part 170 final rule section on External Service Providers is explicit: a CMMC assessor can inherit controls from a FedRAMP-authorised ESP without re-assessing the underlying technical implementation. In practical terms, if your CUI processing happens entirely inside Azure Government or AWS GovCloud (both FedRAMP High authorised), the C3PAO does not need to re-evaluate datacentre physical security, hypervisor isolation, network segmentation at the cloud layer, or host-OS hardening for the cloud-provided components. The C3PAO still assesses your tenant configuration, your IAM policies, your data classification, and your user-level controls.

Practitioner accounts of pre-Phase-2 assessments suggest this inheritance reduces assessor days by 20-40 percent, which translates to roughly $10K-$40K of saved fee for a mid-size contractor. The catch: the ESP must hold a current and applicable FedRAMP authorisation, and the customer-responsibility matrix must be honoured (the CSP publishes which controls are shared, which are inherited, and which are the customer's sole responsibility). Walking past the customer-responsibility lines is a common assessment finding.

When defense contractors need both

The combined-obligation pattern hits cloud service providers, managed service providers, and SaaS vendors that sell into the DIB. If a vendor sells a SaaS that holds CUI on behalf of defense contractor customers, that SaaS itself needs a path to FedRAMP authorisation (or at minimum the equivalency review under the FedRAMP-CMMC parity guidance). The vendor's own operating organisation, separately, needs CMMC because the staff, admin networks, and build pipelines used to operate the SaaS are themselves defense-contractor systems handling CUI.

For these dual-obligation vendors, the budget is the sum of both stacks (less the inheritance savings) and typically lands at $1.5M-$4M over three years. The path is not to try and meet both at once but to phase: FedRAMP first (because customer demand for the cloud service drives the authorisation), then CMMC for the operating organisation once revenue is at scale. Reverse the order for vendors who already sell to defense and need to convert to a managed-service offering.