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FedRAMP Moderate and High are security baselines for cloud services used by federal agencies, differentiated by the potential damage a breach could cause. Moderate covers CUI and other data for which compromise would create a serious adverse effect. High covers data where compromise could be severe or catastrophic. In 2026, FedRAMP began replacing these labels with certification classes, mapping Moderate to Class C and High to Class D, though agencies still make their own risk decisions on top of the class.
Together, these points set up the detailed comparison below, starting with what FedRAMP actually does.
The choice between Moderate and High shapes your architecture, your documentation load, and the extent of ongoing monitoring you take on. Get it wrong and you either under-build for the data you're handling or over-invest in controls your agency customers never asked for. A cyber risk management review early on usually catches this mismatch before it becomes expensive.
The terminology around these levels is shifting, too. FedRAMP is moving toward certification classes in 2026, but buyers, agencies and vendors still search and talk in terms of Moderate and High. This guide covers both, so you understand where the categories stand today and where FedRAMP is taking them.
FedRAMP, the Federal Risk and Authorization Management Program, gives federal agencies one standardized way to assess, authorize, and monitor the security of cloud services. Instead of every agency running its own separate security review of the same cloud product, FedRAMP centralizes that work so an authorization can be reused across the government.
FedRAMP evaluates the cloud service offering itself, not the company as a whole. A vendor with one FedRAMP-authorized product does not automatically have every other product covered. Once a service completes the process, individual agencies issue their own authorization to use it, based on their own data and mission needs. You can check a service's current status directly on the FedRAMP Marketplace, which lists authorized cloud services, sponsoring agencies, and assessors.
For FedRAMP compliance services, working with a partner who understands both the assessment process and your existing architecture speeds up the process.
A note on the transition: FedRAMP's own guidance on certification classes cautions agencies against treating them as automatic, one-for-one swaps for Low, Moderate, or High. A class tells an agency how much assurance information a provider commits to sharing. It does not replace the agency's own risk-based decision about whether a service fits its specific data, configuration, and mission. During the transition period, expect to see both class and impact-level language used side by side across FedRAMP documentation.
Confidentiality asks what happens if protected information gets disclosed to someone who shouldn't see it. Integrity asks what happens if information or system behavior gets altered without authorization. Availability asks what happens if the service goes down when someone needs it.
A cloud service handling routine business data might rate low on all three factors. One handling law enforcement records or emergency response coordination could rate high on confidentiality and availability alike. The categorization process considers the worst-case outcome across all three, not just a single data type in isolation.
Cloud services at this level commonly handle Controlled Unclassified Information, though CUI alone doesn't automatically produce a Moderate categorization. Business systems, collaboration platforms, case-management tools, and financial or operational data often fall under this baseline, too, depending on what the impact of a breach would actually look like.
Law enforcement systems, emergency response platforms, critical federal operations, high-impact health systems, and sensitive mission systems commonly require this baseline. These are examples of where High tends to apply, not an automatic rulebook, since the agency's own categorization decision still governs the outcome.
| Area | FedRAMP Moderate | FedRAMP High |
| Traditional impact description | Serious adverse effect | Severe or catastrophic adverse effect |
| 2026 class terminology | Class C | Class D |
| Common data and use cases | CUI and significant agency workflows | High-impact mission and operational systems |
| Security baseline | Moderate Rev. 5 baseline | High Rev. 5 baseline |
| Resilience expectations | Strong | Generally more demanding |
| Contingency planning | Required | Greater rigor, stronger availability focus |
| Assessment effort | Substantial | Typically more extensive |
| Documentation | Extensive | Usually more detailed |
| Continuous monitoring | Required | Required, often with heightened expectations |
| Upgrade path | Not applicable | Usually requires gap remediation and reauthorization |
The exact requirements for your service still depend on your architecture, your authorization boundary, your sponsoring agency, and the current FedRAMP baseline in effect at the time you assess. Our cloud security solutions overview walks through how these factors interact in practice.
Access control and authentication require stronger identity assurance and tighter privileged-access management at High. Audit and accountability demands broader logging coverage, longer retention, and faster review at High. Configuration and vulnerability management calls for more frequent scanning and stricter change control as the impact rises.
Incident response needs faster reporting, tighter coordination, and more regular exercises at High. Contingency planning and availability, one of the sharpest differentiators between the two levels, covers redundancy, alternate processing sites, backup protection and recovery testing built to shorter recovery windows. System and communications protection, personnel and physical security, and supply-chain risk all increase in rigor as well, which is why a third-party risk assessment often becomes part of High-baseline preparation.
For the current, authoritative control list, check FedRAMP's Rev. 5 Agency Authorization resources rather than relying on a static summary that ages quickly as baselines get updated.
NIST SP 800-53 provides the base catalog of security and privacy controls. NIST SP 800-53B takes that catalog and defines baselines specific to low-, moderate-, and high-impact systems. FedRAMP then adapts those baselines with its own program-specific requirements, documentation standards, and evidence expectations. NIST SP 800-53A supplies the assessment procedures assessors use to verify each control actually works as intended.
This layered structure is why Moderate and High aren't just arbitrary labels. Each one traces back to a specific NIST baseline, tailored through a risk-based process rather than picked off a shelf.
Both Moderate and High services can pursue FedRAMP Ready status ahead of full authorization. It's optional, but strongly recommended as a way to surface gaps early through a security maturity assessment and a cloud security assessment of your current posture.
Expect the process to involve a new gap assessment, architecture changes, additional control implementation, an updated System Security Plan, revised policies and procedures, expanded evidence collection, additional 3PAO testing, updated continuous-monitoring procedures, and coordination with your sponsoring agency. Providers who anticipate future High-impact demand often save time by identifying High-specific architectural gaps before finalizing a Moderate-only design, rather than rebuilding core infrastructure after the fact.
Providers typically define the cloud service offering and its authorization boundary, determine the appropriate impact level or certification approach, and select an authorization strategy with a sponsoring agency or the Joint Authorization Board. From there, the work moves into readiness and gap assessments, control implementation through vulnerability assessment services and penetration testing services, documentation, build and configuration review, independent 3PAO assessment, remediation of findings, agency review, and finally, ongoing continuous monitoring once authorized.
Because FedRAMP continues to update its rules and baselines, don't assume every provider follows one identical route from start to finish. Two services at the same impact level can still take different paths depending on their architecture and their agency relationship.
Getting these distinctions right at the planning stage avoids the more expensive kind of mistake: building toward the wrong baseline, or promising an agency customer a level of assurance the architecture doesn't actually back up.
Microminder doesn't grant FedRAMP authorization and isn't a substitute for a recognized 3PAO. The value sits in preparation: closing gaps, organizing evidence, and getting your architecture ready before assessors arrive.
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What is FedRAMP?
A standardized program for security assessment, authorization, and continuous monitoring of federal cloud services. See FedRAMP compliance services.What is the difference between FedRAMP Moderate and High?
Moderate covers serious adverse impact; High covers severe or catastrophic impact, with stricter controls and monitoring.What are FedRAMP compliance levels?
Traditionally, Low, Moderate, and High. FedRAMP is moving toward Class B, C, and D in 2026.Is FedRAMP Moderate now Class C?
Yes, generally. Agencies still make their own use-specific risk decisions on top of the class.Is FedRAMP High now Class D?
Yes, generally, with the same caveat: class doesn't replace agency risk determination.Does FedRAMP Moderate cover CUI?
Often, but not automatically. The agency determines categorization based on impact and use, not data type alone.How many controls does FedRAMP Moderate or High require?
Totals shift with baseline updates. Check FedRAMP's Rev. 5 baseline documents rather than a fixed number.Can a FedRAMP Moderate service become High?
Yes, but it needs gap remediation, architecture changes, added controls, and reauthorization, not just a label change.Who decides whether a cloud service needs Moderate or High?
The provider, sponsoring agency, authorizing official, and assessors all play a role, but agency risk and use drive it.Is FedRAMP authorization permanent?
No. It requires continuous monitoring, reporting, change management, and ongoing maintenance after authorization.How long does FedRAMP authorization take?
It depends on readiness, scope, baseline, architecture, and agency review. There's no single fixed timeline.