What "Failing" Actually Means
First, a clarification: CMMC assessments don't have a simple pass/fail like a driver's test. There are actually a few different outcomes, and understanding them matters.
Outcome 1: Conditional Certification (POA&M) — You have deficiencies, but they're eligible for a Plan of Action and Milestones. You receive conditional certification and have 180 days to close out the remaining gaps. Some contracts can still be awarded during this period.
Outcome 2: Outright Assessment Failure — You have deficiencies that aren't eligible for POA&M — typically because they're high-weight controls that must be fully implemented before certification. The assessment is not certified. You need to remediate and come back for a re-assessment.
Outcome 3: Scoping Issues — The assessors find that your system boundary is incorrectly defined, or that you excluded systems that should have been in scope. This can invalidate significant portions of your assessment and require the scope to be redefined and re-assessed.
Most assessment failures aren't because the security controls don't exist. They're because the documentation doesn't demonstrate that the controls exist. That's a fixable problem — but it's a lot more expensive to fix after an assessment than before one.
The POA&M Process — 180 Days to Remediate
If your C3PAO assessment results in a conditional certification with POA&M items, here's what the process looks like:
- Assessment results documented — Your C3PAO provides a detailed findings report and uploads results to eMASS. Every deficiency is logged with the specific control reference and a description of what was found.
- POA&M created — You and your C3PAO agree on a Plan of Action and Milestones for each eligible deficiency. This includes a specific remediation action, an owner, and a target date. All dates must fall within 180 days of the assessment.
- Conditional period begins — Your certification is conditional. Contracting officers and primes can see your status in eMASS. Depending on the contract, you may be able to receive award during this period.
- Remediate the gaps — You implement the missing controls, collect evidence, and update your SSP to reflect the changes.
- C3PAO closes out the POA&M items — Your C3PAO reviews your remediation evidence and closes out the POA&M items they can verify. Items that aren't closed by day 180 result in assessment failure.
- Certification issued (or not) — If all POA&M items are closed within 180 days, your full certification is issued. If they're not, the conditional certification lapses and you're back to square one.
What Can Go on a POA&M and What Can't
Not every deficiency is eligible for POA&M treatment. This is one of the most important things to understand before your assessment — because if you've been counting on fixing something after the fact that isn't POA&M-eligible, you're in trouble.
| Control Type | POA&M Status | Notes |
|---|---|---|
| Lower-weight controls (1–2 pts) that are in process | POA&M Eligible | Remediation must complete within 180 days |
| Administrative gaps (policy exists but needs updating) | POA&M Eligible | Documentation fixes are generally allowable |
| Multi-factor authentication (3.5.3) | Not Eligible | Must be fully implemented before certification |
| Incident response plan (3.6.1) | Not Eligible | Must exist and be tested before certification |
| CUI encryption at rest and in transit (3.13.8, 3.13.10) | Not Eligible | Fundamental data protection requirements |
| Boundary controls / network segmentation | Not Eligible | Must be properly implemented before assessment |
| Access control fundamentals (3.1.1, 3.1.2) | Not Eligible | Least privilege and authorized user controls |
The pattern is clear: controls that are fundamental to protecting CUI — the controls with the highest security impact — aren't POA&M eligible. They have to be done before you walk into the assessment room. If they're not, your assessment isn't going to end with a certification.
The Real Cost: You Pay Twice
This is the financial reality that most contractors don't fully internalize until it happens to them. Going into a CMMC assessment unprepared — and failing — means you pay for the whole thing twice.
Compare that to a scenario where the same company does a thorough mock assessment before their C3PAO assessment, catches the same issues, fixes them over 4–6 months, and walks into their assessment fully prepared:
- Documentation and prep: $15,000 (with better tools and focused scope)
- Mock assessment + gap remediation: $20,000
- C3PAO assessment: $45,000
- Total: $80,000 — about 43% less
The mock assessment isn't a luxury. It's the single best investment you can make in your CMMC journey because it turns expensive surprises into manageable preparation work.
MyCMMC's Assessment-Ready Package includes documentation and evidence organization designed to surface gaps before your formal assessment — not after.
Get Assessment-Ready →Contract Impact — What Happens to Your Work
If you're in the middle of a contract — or trying to win one — and you fail your assessment, the consequences are immediate and concrete.
For contracts already in progress: If you're working under DFARS 252.204-7021 and you fail your assessment, you're in breach of your contract obligation. Whether the contracting officer terminates the contract depends on the severity of the gaps, how quickly you're remediating, and the contracting officer's discretion. In practice, most contractors with a credible POA&M aren't immediately terminated — but the relationship is strained and you're operating under scrutiny.
For contracts you're trying to win: If you don't have a CMMC certification and the solicitation requires one, you can't be awarded the contract. Period. You can submit a proposal but you won't get an award. With assessment slots booking out 6–12 months in advance, "I'm working on it" doesn't get you past the contracting officer.
For future contracts: Your assessment results — including any failures and POA&M items — are visible to the government in eMASS. This isn't a secret. Contracting officers can see whether you've had assessment difficulties in the past. It doesn't automatically disqualify you from future work, but it's part of your record.
The Most Common Reasons Contractors Fail
Here's the real list — based on what actually comes up in assessments, not what people imagine will cause failures.
The most common failure mode. The SSP describes what someone intended to implement, or what a consultant wrote based on an initial interview. The assessors probe the real network and find configurations that don't match what's documented. Every discrepancy between your SSP and your actual environment is a finding.
You say you have multi-factor authentication enabled. Your assessor asks to see evidence. You don't have screenshots, configuration exports, or any artifact that proves it's actually configured. Saying you do something and being able to prove you do it are different things.
You have an access control policy that says terminated employees must have their access revoked within 24 hours. Your assessor asks about the last three terminations and finds two accounts that were still active two weeks after the employee left. The policy isn't the problem — the practice is.
Systems that should be in scope were left out to keep the assessment simpler. Assessors discover the unscoped systems during technical interviews. Now the boundary needs to be redrawn and previously assessed controls need to be re-evaluated against the expanded scope.
MFA was always on the to-do list. Incident response was "basically" covered by someone's general knowledge. Audit logging was turned on but nobody ever checked whether it was actually capturing the right events. These are the gaps that trigger outright failure, not conditional certification.
How to Avoid Assessment Failure
The path to avoiding failure is straightforward, even if it isn't easy:
Your SSP needs to describe what you actually do, not what a template says you should do. Build it by going through each control and asking: "What specifically do we do, on what systems, with what configuration, to satisfy this?" If you can't answer that, the control isn't ready for an assessor.
For every control you implement, take a screenshot. Export a configuration. Print a report. Create a file named after the control and put the evidence in it. When an assessor asks "how do you do this?" you pull out a folder, not a story.
A Registered Practitioner (not a C3PAO, just a knowledgeable reviewer) can walk through your SSP and evidence package and tell you where the gaps are before the formal assessment. A mock assessment typically costs $5,000–$15,000. The difference in what you spend if you skip it and fail is far larger.
MFA, incident response, CUI encryption, boundary controls — these are the controls that will end your assessment before it starts if they're not done. Get these implemented and evidenced before you spend money on anything else.
There's no prize for going early. Assessment slots are expensive and non-refundable. If your mock assessment shows 15 open findings, don't schedule your formal assessment for 30 days later. Fix the gaps, get clean evidence, and then book the slot.
Our Assessment-Ready Package gives you the SSP, policies, evidence guide, and documentation structure that passes C3PAO scrutiny — built around your actual environment.
See What's Included →Frequently Asked Questions
If you have deficiencies that prevent certification, the C3PAO documents the findings and issues you a Plan of Action and Milestones (POA&M). For Level 2, you have 180 days to remediate POA&M items and return for re-assessment. During that window, conditional contract award may be possible for some contracts depending on the severity of gaps. The C3PAO uploads the assessment results to eMASS regardless of outcome.
It depends on the nature of the gaps. Some contracts allow conditional award with an active POA&M — meaning you can receive the contract but must remediate outstanding items within 180 days. Other contracts, especially those involving higher-sensitivity programs, may require full certification before award. The contracting officer has discretion here. What's certain is that the gaps will be visible in your eMASS record and the CO will know.
Not all deficiencies can be placed on a POA&M. Lower-weight controls — those worth 1 or 2 points — can typically go on a POA&M. Higher-weight controls, especially fundamental requirements like multi-factor authentication, incident response plans, and CUI encryption, are generally required to be fully implemented before certification. A CMMC assessor can't certify a contractor whose most critical security controls are "planned" rather than implemented.
This is the real financial danger of going into an assessment unprepared. You've already paid for the C3PAO assessment ($30,000–$100,000 or more). Now you need to implement the missing controls, document them, collect evidence, and potentially pay for a re-assessment. Companies that fail their first assessment often end up spending 30–60% more than they would have if they'd done a mock assessment first. Total cost can easily reach $150,000–$300,000 for a small contractor with significant gaps.
Documentation gaps are the leading cause of assessment failures — not actual security failures. Most commonly: SSP doesn't reflect the actual environment, evidence doesn't support the claimed implementation, policies exist but aren't actually being followed, or scope was defined too broadly without proper boundary controls. The controls themselves are often implemented, but the documentation and evidence trail isn't there. This is exactly what a mock assessment is designed to catch before the real thing.
Don't pay for your assessment twice.
Start with documentation that's built to hold up under C3PAO scrutiny. Take our free 2-minute assessment to see where you stand.
Start Free Readiness Check →2 minutes. No sales call. See your results right away.
Or see pricing & packages →