FedRAMP and CMMC compliance deadlines are looming

Is your company ready for the upcoming FedRAMP and CMMC deadlines?

With the latest FedRAMP deadline on Sept. 30 and the CMMC deadline on Nov. 10, federal contractors are less than six months away from needing to demonstrate compliance.

Both programs require documented evidence, third-party assessments, and in some cases significant changes to how systems are configured and managed. Organizations that are not already on their way to compliance will lag behind their competition.

Failure to comply with these deadlines can have serious implications for your business — from revocation of your FedRAMP certification status to being unable to compete for potentially lucrative contracts with the Defense Department.

Let’s take a closer look at the two upcoming deadlines, and what you need to do to meet these important requirements.

FedRAMP compliance: A play in two acts

For the uninitiated, FedRAMP governs how cloud service providers handle federal data. The program is undergoing its most significant modernization in years, driven by the transition to NIST SP 800-53 Revision 5 — a shift that is a fundamental reset of cybersecurity expectations for cloud vendors operating in the federal space.

The Sept. 30, 2026, deadline is the first of two FedRAMP deadlines on the horizon.

By this fall, vendors must transition their authorization packages to machine-readable formats — a requirement designed to streamline federal review processes and reduce the documentation bottlenecks that have historically slowed FedRAMP authorizations. This is not a formatting preference; it is a compliance requirement.

The second deadline plays out 12 months later. By Sept. 30, 2027, all FedRAMP-authorized vendors must be fully aligned with Revision 5 control baselines, with particular emphasis on configuration management, system hardening, and continuous monitoring. Vendors who have not completed that transition by the final deadline face revocation of their FedRAMP certification.

For vendors currently listed in FedRAMP's Preparation Phase, there is additional urgency. New rules require that organizations achieve FedRAMP Certified or Validated status within 12 months of entering that phase or face removal from the marketplace entirely.

Three priorities should be driving your FedRAMP planning right now.

First, assess where your current authorization sits relative to Revision 5 requirements. Many vendors are further from compliance than they realize, especially when it comes to the full integration of privacy controls and control families for personally identifiable information and supply chain risk management.

Second, engage an accredited third-party assessment organization (3PAO) early. Assessment schedules are filling up.

Third, monitor the new FedRAMP requests for comments released in early 2026. These RFCs propose changes that create new opportunities to expedite FedRAMP validations and Rev 5 certifications, but also introduce new obligations, such as assessment‑cost reporting, expanded marketplace transparency and machine‑readable authorization data requirements.

Organizations that treat the initial September 2026 machine-readability deadline as the deadline for both actions, rather than a stop along the way to 2027, will be in a better competitive position. Vendors who wait for 2027 to begin substantive Rev 5 work will be managing a crisis, not a transition.

CMMC: Mandatory and already in motion

Effective Nov. 10, 2026, DOD’s CMMC requirement for C3PAO assessments becomes mandatory across all new defense contracts involving federal contract information (FCI) or controlled unclassified information (CUI).

This ends reliance on self-attestation, requiring independent, third-party verification of NIST SP 800-171 compliance. Every contractor across the defense industrial base is expected to be CMMC compliant on one of the three levels by 2028.

CMMC is not a self-certification program, and it does not forgive preparation gaps. DOD will not award or extend defense contracts without proof of a CMMC third-party certification at the required level.

There is no workaround and no shortcut. There is, however, an exception. CMMC does not apply to defense contracts that are solely for the acquisition of commercial-off-the-shelf (COTS) items. This exception can be tricky, though, because it doesn’t apply to services and it does not apply where the contractor possesses CUI.   

If you miss the deadline, the remediation process is not quick. It involves gap correction, scheduling the C3PAO assessment, and reapplication. C3PAO availability is constrained, and the process can add months to your compliance timeline.

Expected Phase 3 implementation, beginning Nov. 10, 2027, will introduce government-led Defense Industrial Base Cybersecurity Assessment Center (DIBCAC) assessments.  Preparing your documentation now for this eventuality makes sense due to the protracted cycles for certain types of acquisitions.

Subcontractors are at risk here as well. CMMC requirements flow down through the supply chain, and subcontractors handling FCI or CUI are subject to the same certification requirements as the primes. If you are a subcontractor waiting for a prime to tell you what to do, you are already late.

Layered on top of this deadline is another development that contractors handling CUI should track. NIST SP 800-171 Revision 3 will become mandatory for contractors subject to Defense Federal Acquisition Regulation Supplement (DFARS) requirements, and its adoption will have downstream effects on CMMC 2.0 compliance obligations.

Rev 3 is not a minor update. It tightens requirements around access control, incident response, and supply chain risk management in ways that will require organizations to revisit documentation and controls they may believe are already in order. Get ahead of it now so it doesn’t become an emergency after the upcoming November 2026 CMMC deadline.

What to do before the deadlines hit

Organizations that successfully navigate the deadlines will have three things in common: an early start, credible third-party partnerships, and a realistic assessment of the gap between where they are today and where they need to be.

Here are some quick tips to get ready.

For FedRAMP: Review your current authorization package against Rev 5 baselines now. Identify what documentation needs to be converted to machine-readable format and have a C3PAO engaged before the summer. The fall 2026 deadline for machine-readable packages is just around the corner.

For CMMC: If you have not already conducted a gap assessment against the required controls of the relevant CMMC level for your contracts, do so now. Level 2, which covers most contractors handling CUI, requires a formal assessment by a C3PAO. Scheduling that assessment takes time. Completing the remediation that may follow will take even more.

The federal government is playing hardball and has indicated strict enforcement of these deadlines. For contractors and subcontractors selling into defense agencies, the question isn’t whether to comply — it is whether you will be ready on time.

To understand more details about compliance and the deadlines surrounding FedRAMP and CMMC contact immixGroup.

Amanda Mull is a federal contract specialist for immixGroup, the public sector business of Arrow Electronics. immixGroup delivers mission-driven results through innovative technology solutions for public sector IT. Visit immixGroup.com for more information.