FedRAMP Overview for Cloud Service Providers
The Federal Risk and Authorization Management Program (FedRAMP) establishes the standardized security assessment, authorization, and continuous monitoring framework that cloud service providers (CSPs) must satisfy before their offerings can be procured by U.S. federal agencies. This page describes the program's regulatory structure, the authorization pathways available to CSPs, the scenarios that trigger program requirements, and the boundaries that determine which path a provider must follow. It draws on published guidance from the General Services Administration (GSA), the Office of Management and Budget (OMB), and the National Institute of Standards and Technology (NIST).
Definition and scope
FedRAMP was established by OMB memorandum in 2011 and codified by the FedRAMP Authorization Act, signed into law as part of the National Defense Authorization Act for Fiscal Year 2023 (FedRAMP Authorization Act, NDAA FY2023, Div. F, §§1001–1010). The program mandates that any cloud service — defined as infrastructure, platform, or software delivered as a service — used to process, store, or transmit federal information must hold an active FedRAMP authorization before agency procurement.
The program's scope is defined by two intersecting variables: the cloud deployment model (public, private, hybrid, or community) and the impact level assigned to the data the system will handle. NIST FIPS 199 and NIST SP 800-60 govern impact categorization, placing systems into Low, Moderate, or High impact tiers based on the potential consequences of a confidentiality, integrity, or availability failure (NIST FIPS 199).
The FedRAMP Program Management Office (PMO), housed within GSA, administers the marketplace of authorized offerings and maintains the security control baselines derived from NIST SP 800-53. The Moderate baseline alone contains 323 controls — the most common baseline applicable to federal workloads that process non-public but unclassified information.
How it works
FedRAMP authorization proceeds through a structured sequence of phases regardless of which authorization pathway a CSP pursues.
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Readiness Assessment — The CSP completes a Readiness Assessment Report (RAR) documenting its control implementation posture. The PMO reviews the RAR to determine whether the system is likely to achieve full authorization.
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Security Assessment — An accredited Third Party Assessment Organization (3PAO) conducts an independent audit of the CSP's System Security Plan (SSP), policies, and technical controls. The 3PAO is accredited by the American Association for Laboratory Accreditation (A2LA) under FedRAMP criteria.
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Authorization Decision — The authorizing official — either a federal agency Chief Information Officer (CIO) or the Joint Authorization Board (JAB), depending on pathway — reviews the Security Assessment Report (SAR) and Plan of Action and Milestones (POA&M) and issues an Authorization to Operate (ATO) or Provisional ATO (P-ATO).
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Continuous Monitoring — Post-authorization, the CSP submits monthly vulnerability scanning results, annual security assessments, and incident reports. The FedRAMP Continuous Monitoring Strategy Guide specifies reporting cadences and remediation timeframes.
Agency ATO vs. JAB P-ATO: These two pathways differ in scope and reusability. An Agency ATO is granted by a single sponsoring agency and may be reused by other agencies through the FedRAMP marketplace. A JAB P-ATO is issued by the Joint Authorization Board — composed of CIOs from the Department of Defense (DoD), the Department of Homeland Security (DHS), and GSA — and carries presumptive government-wide reuse authority. The JAB pathway is more rigorous in vetting and is prioritized for cloud offerings with broad cross-agency demand.
Common scenarios
Commercial SaaS entering the federal market: A software vendor seeking to sell a collaboration or productivity platform to federal customers initiates the Agency ATO pathway by identifying a sponsoring agency willing to serve as the authorizing official. The vendor engages a 3PAO, prepares the SSP documenting control implementation against the FedRAMP Moderate baseline, and undergoes assessment before the agency CIO issues the ATO. The authorization is then verified on the FedRAMP marketplace, making it available to the approximately 430 federal agencies and sub-agencies that reference the marketplace for procurement decisions.
Infrastructure provider targeting DoD workloads: Cloud infrastructure providers handling Controlled Unclassified Information (CUI) for DoD components must meet not only FedRAMP Moderate or High baselines but also the additional requirements in the DoD Cloud Computing Security Requirements Guide (CC SRG), published by the Defense Information Systems Agency (DISA). This overlay adds DoD-specific controls on top of the FedRAMP baseline and requires separate Impact Level designations (IL2 through IL6).
Existing authorized CSP adding a new service offering: A CSP that already holds a FedRAMP authorization for one service must submit a significant change request to the PMO and sponsoring agency before extending that authorization to cover a materially different offering. The PMO's Significant Change Policies and Procedures define what constitutes a significant change requiring re-assessment versus a standard change reportable through continuous monitoring.
Professionals navigating the intersection of federal procurement and information security qualification standards will find the Infosec Providers a useful reference for locating assessed and authorized providers.
Decision boundaries
The primary decision point for a CSP is determining the required impact level before beginning authorization preparation. Selecting the wrong baseline — most commonly underestimating data sensitivity and pursuing a Low authorization when the agency's data qualifies as Moderate — results in rejected authorizations and costly remediation cycles.
| Impact Level | FIPS 199 Definition | Applicable Baseline | Approximate Control Count |
|---|---|---|---|
| Low | Limited adverse effect on agency operations | FedRAMP Low | 125 controls |
| Moderate | Serious adverse effect | FedRAMP Moderate | 323 controls |
| High | Severe or catastrophic effect | FedRAMP High | 421 controls |
(Control counts reflect FedRAMP baselines published by GSA as of the Rev 5 transition; FedRAMP Baselines.)
A second boundary governs pathway selection. The JAB P-ATO pathway requires the CSP to demonstrate sufficient federal demand — the PMO uses a prioritization process to select offerings for JAB review based on government-wide need. CSPs that cannot demonstrate broad cross-agency demand are directed to the Agency ATO pathway.
The continuous monitoring obligation persists indefinitely post-authorization. A CSP that fails to submit monthly deliverables or that exceeds the remediation windows defined in its POA&M risks authorization revocation, which removes the offering from the FedRAMP marketplace and terminates existing agency procurement relationships.
For a broader orientation to the security compliance service landscape, the describes how this reference network is organized, and How to Use This Infosec Resource provides context on navigating the provider network by compliance domain.