NIST 800-53 for federal agencies and cloud providers
Baselines, tailoring, and the FedRAMP path — how 800-53 actually gets used in federal systems and authorizations.
800-53 is mandatory for federal information systems and the control basis for FedRAMP. Whether you're an agency authorizing official or a cloud provider seeking authorization, the mechanics are the same.
Baselines and tailoring
Select the low, moderate, or high baseline for your system's impact level, then tailor: add, remove, or adjust controls with justification. The moderate baseline is the common FedRAMP target. Tailoring decisions belong in your security plan before assessment — arguing them during assessment is expensive.
The FedRAMP path for cloud providers
Implement the baseline → 3PAO assessment → PMO or agency review → authorization. Firms in our directory tagged for the federal stage include authorized 3PAOs (Coalfire, Schellman) and readiness consultants (GuidePoint Security, A-LIGN, Optiv, StackArmor).
Budget reality
Our labeled estimates: 800-53 moderate-baseline assessment $50,000–$150,000; full FedRAMP 3PAO assessment $200,000–$500,000+ before remediation and PMO process. Full breakdown in the cost guide.
Get quotes from firms that do this work
Matched to your sector and scope — free, 2 minutes.
How it works: tell us once (4 questions, 2 min) → we match licensed auditors to your size and scope → they send scoped quotes directly. Free, no obligation.