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SOC 2 does not satisfy CMMC, and a CMMC status does not automatically replace SOC 2. SOC 2 gives customers a CPA’s opinion on controls in a defined service-organization system. CMMC verifies contractually required safeguards for Federal Contract Information (FCI) or Controlled Unclassified Information (CUI).
The timing matters. On July 13, 2026, the Department suspended CMMC Phase II, which had been scheduled to begin November 10, 2026. The current CMMC program page says implementation is paused in Phase I: Level 1 and Level 2 self-assessment requirements remain, while the broader Phase II rollout of Level 2 third-party assessments is suspended. Existing DFARS safeguarding duties still apply.
This comparison helps a SaaS company or defense supplier decide which work comes first and what can be reused. For a CMMC-only reference, including the program’s level structure, use the CMMC framework explainer.
What changed in the CMMC program in 2026?
CMMC is paused in Phase I. Current Department guidance allows Level 1 annual self-assessments and Level 2 self-assessments every three years, with required affirmations. The planned Phase II expansion of Level 2 C3PAO assessments is suspended pending review.
The 32 CFR Part 170 final rule, effective December 16, 2024, still defines the program’s three-level design. The July 2026 action changed the rollout state, not the need to protect covered information under applicable contract clauses.
| CMMC level | Program design | Current Phase I position |
|---|---|---|
| Level 1 | 15 safeguarding requirements from FAR 52.204-21 for FCI | Annual self-assessment and affirmation remain in place; POA&Ms are not permitted. |
| Level 2 | 110 requirements from NIST SP 800-171 Revision 2 for CUI; the rule provides self-assessment and C3PAO assessment paths as specified by the procurement | Self-assessment every three years and annual affirmation remain in place. The general Phase II rollout of Level 2 C3PAO requirements is suspended. |
| Level 3 | Level 2 C3PAO status plus 24 selected NIST SP 800-172 requirements, assessed by DCMA DIBCAC | Level 3 is part of the program design, but it is not a general Phase I assessment path. The Department says it may use select government-led assessments during the pause. |
Do not plan from the old four-phase calendar alone. Read the solicitation and contract, then check the Department’s current CMMC page before budgeting an assessment.
How are SOC 2 and CMMC different?
SOC 2 is a CPA examination for users of a service organization’s system; CMMC is a defense-contract assessment program for safeguarding FCI or CUI. They differ in trigger, scope, criteria, assessor authority, output, and current assessment path.
The AICPA describes SOC as assurance services CPAs provide over system- or entity-level controls. A SOC 2 report addresses controls relevant to Security and any selected additional Trust Services Criteria: Availability, Processing Integrity, Confidentiality, or Privacy. CMMC uses requirements selected by the contract and the type of federal information involved.
| Attribute | SOC 2 | CMMC |
|---|---|---|
| Decision trigger | A customer, contract, vendor-risk program, or sales process asks for assurance over a service. | A defense solicitation or contract specifies a required CMMC status for an environment that processes, stores, or transmits FCI or CUI. |
| Governing basis | AICPA attestation standards and Trust Services Criteria. | 32 CFR Part 170, applicable FAR/DFARS clauses, and the security requirements assigned to the CMMC level. |
| Scope | Management describes a service-organization system and the controls relevant to its service commitments and selected criteria. | The assessment scope follows covered information, assets, people, facilities, and services that process, store, transmit, or protect FCI or CUI. |
| Assessment path | An independent licensed CPA firm performs the examination. Type 1 addresses controls at a specified date; Type 2 also addresses operating effectiveness over a period. | Under the current Phase I pause, Level 1 and Level 2 use self-assessment paths. The program rule also defines C3PAO and government-led certification paths, but the Phase II expansion is suspended. |
| Primary output | A restricted-use SOC 2 report containing management’s assertion, the system description, the service auditor’s opinion, and test results. | A CMMC status and affirmation recorded through the applicable Department process; certification status applies to the third-party or government-led paths defined by the program. |
| Control design | The organization designs controls to meet the applicable criteria and its commitments. | The applicable level supplies a prescribed set of safeguarding or security requirements. |
| Cadence | Determined by the reporting period and customer expectations; many organizations commission reports on a recurring cycle. | Current Phase I: Level 1 self-assessment annually; Level 2 self-assessment every three years; affirmations follow the assessment and continue annually for Level 2. |
| Does it replace the other? | No. A CPA opinion does not create CMMC status. | No. A CMMC status does not create a SOC 2 report for commercial customers. |
The standalone SOC 2 Trust Services Criteria guide explains the SOC 2 criteria. The CMMC reference page owns the level-by-level CMMC details.
Does SOC 2 count toward CMMC?
SOC 2 evidence can support CMMC work when the artifact, system, population, and period fit both scopes. The SOC 2 report and auditor conclusions do not transfer. Reuse must be proved requirement by requirement; there is no defensible universal overlap percentage.
The useful unit of reuse is an operating artifact, not a framework label. A quarterly access review may support a SOC 2 criterion and a CMMC security requirement. It helps only if the review includes the CMMC assessment scope, uses the required population, and shows the control operated when required.
| Evidence area | SOC 2 material that may be reusable | What CMMC still needs |
|---|---|---|
| Identity and access | Joiner, mover, and leaver records; privileged-role inventories; MFA settings; approvals; periodic access reviews. | Proof must cover every relevant CMMC asset and account, including administrators and external service providers in the assessment scope. |
| Asset and boundary records | System description, architecture diagrams, asset inventory, vendor inventory, and data-flow diagrams. | A CMMC-specific assessment scope that identifies where FCI or CUI is processed, stored, transmitted, and protected, including specialized assets and out-of-scope boundaries. |
| Configuration and change management | Baselines, pull requests, approvals, test results, deployment logs, exception records, and emergency changes. | Evidence that each applicable NIST SP 800-171 requirement is implemented across the CMMC scope, not merely that a general change process exists. |
| Logging and incident response | Log-source inventory, alert reviews, incident plan, exercises, tickets, investigations, and corrective actions. | Coverage and procedures tied to covered systems, contract clauses, reporting duties, and the applicable CMMC assessment objective. |
| Risk and third-party oversight | Risk register, vendor reviews, contracts, security questionnaires, management approvals, and remediation tracking. | CMMC-specific external-service-provider responsibilities, inherited-control evidence, System Security Plan content, and any permitted POA&M treatment. |
Five boundaries prevent automatic acceptance:
- A SOC 2 opinion is not a CMMC status. The CPA reports against AICPA criteria; the CMMC result follows the Department’s assessment and affirmation process.
- The scopes may not match. A customer-facing SaaS system can exclude corporate identities, endpoints, facilities, or external providers that fall inside the FCI or CUI boundary.
- Testing methods differ. A sampled SOC 2 test does not by itself prove every applicable CMMC assessment objective.
- Assessor authority differs. A CPA firm can issue SOC 2 reports. A C3PAO performs Level 2 certification assessments only when that path applies; DCMA DIBCAC performs Level 3 assessments under the program design.
- Open gaps are treated differently. The CMMC program restricts which requirements can enter a POA&M and how quickly eligible items must be closed. A SOC 2 remediation plan does not override those rules.
Which should a SaaS or defense supplier prioritize?
Prioritize the requirement tied to the nearest real revenue or contract condition, then preserve evidence for the other program. Commercial assurance usually points to SOC 2. A solicitation or contract naming CMMC, FCI, CUI, or DFARS makes the applicable defense requirement the first constraint.
| Company situation | Priority | Why |
|---|---|---|
| Commercial SaaS; no defense requirement or covered federal information | SOC 2 when customers request it | SOC 2 answers commercial vendor-assurance questions. CMMC work has no defined contract scope on these facts. |
| Phase I solicitation or contract requires Level 1 or Level 2 self-assessment | Complete the stated CMMC work first or in parallel with SOC 2 | Contract eligibility and protection of FCI or CUI control the decision. A SOC 2 report cannot substitute for the self-assessment and affirmation. |
| Commercial customers and a defense contract require separate deliverables | Run both with separate scopes and one evidence map | Coordinated evidence collection reduces duplicate work without merging the conclusions or deliverables. |
| Defense opportunity is credible but no solicitation or contract names a CMMC requirement | Classify likely data, model the boundary, and build reusable controls; do not claim a CMMC status | Early architecture work is useful. Procuring a C3PAO assessment solely from the suspended Phase II calendar may solve the wrong problem. |
| Defense-only supplier | Follow the contract’s CMMC and DFARS requirements; add SOC 2 only for a separate buyer need | SOC 2 is optional unless a customer, partner, insurer, or other party asks for the report. |
| Contract language is unclear | Get the required level, assessment type, scope, and due date confirmed in writing | The information type and solicitation determine the path. A vendor’s generic CMMC recommendation does not amend the contract. |
The Phase II suspension is not permission to ignore CUI safeguards. The Department’s current notice says DFARS 252.204-7012 obligations remain in force during the review.
How should you sequence SOC 2 and CMMC work?
Sequence both programs from external requirements and data flows, not from a prebuilt control crosswalk. Define the two scopes first, map shared operating evidence second, and procure each formal assessment only after the required output and assessor authority are clear.
- Record each external request. Name the customer, prime contractor, contracting office, or internal owner; capture the exact SOC 2 report type or CMMC status requested and the due date.
- Trace FCI, CUI, and customer data separately. Map systems, endpoints, identities, facilities, backups, support tools, integrations, and external providers. Mark where the paths overlap and where they do not.
- Define two scopes. Write the SOC 2 system description around the service commitments. Define the CMMC assessment scope around the applicable covered information and asset categories.
- Build one artifact map with two conclusions. For each artifact, identify the SOC 2 criterion, CMMC requirement or assessment objective, in-scope population, evidence period, owner, and any framework-specific work.
- Complete the currently applicable CMMC path. During the Phase I pause, follow the solicitation’s self-assessment and affirmation requirements and record results through the required Department system. Recheck current guidance before assuming the old Phase II date or engaging a C3PAO.
- Use the right authorized party. Hire a licensed CPA firm for SOC 2. If a Level 2 certification assessment becomes required, verify the C3PAO and legal entity in the official marketplace. The CMMC C3PAO and SOC 2 firm comparison owns that provider-selection task.
For wider federal scoping questions, use the SOC 2 guide for government contractors. It covers contract clauses and federal assurance paths beyond this comparison.
How did we compare SOC 2 and CMMC?
We reviewed primary AICPA and Department sources and separated the CMMC rule’s three-level design from the program’s current Phase I pause. We excluded unsupported control-overlap percentages, standardized cost claims, and claims of automatic evidence acceptance.
The comparison uses three source roles:
- The AICPA SOC suite defines the CPA assurance context for SOC services.
- The Department’s current CMMC page controls statements about the July 2026 suspension and what applies during the Phase I pause.
- The 32 CFR Part 170 final rule supplies the underlying program design, assessment paths, and POA&M rules.
CMMC implementation is volatile. Recheck the Department source before relying on the assessment-path or rollout statements in a proposal, budget, or contract decision.
What is the bottom line on SOC 2 vs CMMC?
Choose SOC 2 for independent assurance that commercial users request. Follow CMMC when a defense solicitation or contract requires a status for FCI or CUI. Pursue both when both markets demand them, but keep the scopes, assessors, testing conclusions, and deliverables separate.
Start with the written requirement and the data boundary. Then use a control-level evidence map to identify genuine reuse. Once the SOC 2 scope is defined, compare licensed SOC 2 audit firms using the same system description so proposals remain comparable.