CMMC Remediation Costs: Gap Assessment, Tools, and Implementation
Remediation is typically the largest single cost category in a CMMC certification project. It covers closing the gaps between your current security posture and the required NIST 800-171 controls. This page breaks down costs by control category so you can build an accurate budget.
Gap Assessment Costs
A gap assessment is the essential first step. It compares your current security controls against the required CMMC practices and produces a prioritized remediation roadmap. Costs depend on the scope and depth of the assessment:
| Assessment Type | Cost | Includes |
|---|---|---|
| Basic (Level 1) | $3,500 - $8,000 | Policy review, basic control check against 17 practices |
| Standard (Level 2, <100 employees) | $10,000 - $25,000 | Document review, vulnerability scan, CUI flow mapping, SPRS scoring, gap report |
| Comprehensive (Level 2, 100+ employees) | $25,000 - $60,000 | All standard items plus network architecture review, pen testing, multi-site evaluation |
Remediation Cost by Control Category
| Control Area | Cost Range | Key Items | Priority |
|---|---|---|---|
| Access Control | $3K - $30K | MFA deployment, privileged access management (PAM) | Critical |
| Audit / Accountability | $15K - $100K | SIEM deployment, log aggregation, retention policies | Critical |
| System Protection | $10K - $80K | Network segmentation, VLANs, firewall rules, micro-segmentation | High |
| Encryption | $5K - $40K | FIPS 140-2 validated encryption at rest and in transit | Critical |
| Media Protection | $5K - $30K | Backup procedures, media sanitization, air-gapped backups | Medium |
| Risk Assessment | $3K - $15K | Vulnerability scanning tools, risk assessment procedures | Medium |
| Identification / Auth | $5K - $25K | PAM tools, session management, account lockout policies | High |
| Configuration Management | $5K - $30K | Baseline configurations, change management, system hardening | Medium |
| Incident Response | $3K - $20K | IR plan, playbooks, tabletop exercises, communication procedures | High |
| Personnel Security | $1K - $5K | Background checks, termination procedures, role-based access | Low |
Remediation Priority Order
Address these areas first. They are the most common C3PAO assessment failure points and cannot be deferred through POA&M:
- Multi-Factor Authentication (MFA) for all privileged accounts and remote access. This is the single most common gap and a hard requirement with no POA&M option.
- SIEM / Audit Logging capturing all required events with appropriate retention. Must cover authentication attempts, privilege changes, access to CUI, and system configuration changes.
- FIPS 140-2 Validated Encryption for CUI at rest and in transit. Standard TLS is not sufficient unless the implementation uses a FIPS-validated cryptographic module.
- System Security Plan (SSP) that accurately describes your environment, system boundaries, data flows, and how each of the 110 practices is implemented.
- Network Segmentation isolating CUI systems from general-purpose networks. Flat networks without segmentation are a common and expensive-to-fix gap.
SSP Development Costs
The System Security Plan is the foundational document for your CMMC assessment. It describes your system boundary, data flows, inherited controls, and how each of the 110 NIST 800-171 practices is implemented. SSP development costs include:
| SSP Component | Cost |
|---|---|
| System boundary definition and network diagrams | $2,000 - $8,000 |
| Practice-by-practice implementation descriptions (110 controls) | $5,000 - $15,000 |
| Evidence collection and organization | $3,000 - $10,000 |
| Total SSP Development | $5,000 - $25,000 |
Frequently Asked Questions
What are the most common CMMC assessment failures?
The most common failure points are: MFA not deployed for all privileged and remote access, SIEM/audit logging not capturing all required events, encryption not using FIPS 140-2 validated modules, incomplete or inaccurate System Security Plan (SSP), and insufficient evidence of security awareness training. Address these areas first as they are the most likely to cause assessment delays or failures.
How much does a CMMC gap assessment cost?
Gap assessments range from $3,500 for a basic Level 1 review to $60,000 for a comprehensive Level 2 assessment of a large organization. A typical mid-size company (50 to 200 employees) should budget $10,000 to $25,000 for a thorough gap assessment that includes document review, vulnerability scanning, CUI flow mapping, and a detailed remediation roadmap with priority-ranked action items.
Should I remediate everything before the C3PAO assessment?
Ideally yes, but the POA&M process provides some flexibility. Critical controls (MFA, encryption, audit logging, SSP completeness) must be fully implemented before the assessment. Other gaps may qualify for a Plan of Action and Milestones, giving you 180 days to remediate after receiving a conditional certification. However, entering an assessment with too many open gaps increases the risk of an outright failure rather than a conditional pass.