What Li-SaaS is
FedRAMP Tailored for Low-Impact SaaS (Li-SaaS) is a reduced-scope baseline published to accelerate authorization of low-impact, low-complexity SaaS offerings. It is built from the FedRAMP Low baseline but pares down to 156 controls by leveraging inheritance and removing controls that do not apply to a narrowly-scoped SaaS model. Li-SaaS packages are simpler, cheaper, and faster to assess than full Low, Moderate, or High.
Li-SaaS is not a discount for everyone. It is a specific fit for a specific kind of service. Misapplying it wastes six months.
Eligibility criteria
For Li-SaaS the service must meet all of:
- FIPS 199 Low — no confidentiality, integrity, or availability impact above Low. In practice: no PII, no CUI, no financial data, no HR data.
- Operates in a FedRAMP-authorized underlying environment (IaaS or PaaS) — Low, Moderate, or High.
- Does not manage, modify, or significantly process federal data — the SaaS is a tool, not a system of record.
- Uses MFA for federal users.
- Does not store federal data for extended periods (if any).
- Provides limited service interconnections.
In practice Li-SaaS fits marketing analytics tools, scheduling utilities, survey platforms, simple collaboration add-ons, and narrow productivity tools. It does not fit anything that holds federal CUI, PII, or mission data.
The 156 controls
Li-SaaS draws from NIST 800-53 Low baseline but reduces the count via a combination of:
- Inheritance from the underlying FedRAMP-authorized platform (many controls are fully inherited).
- Explicit removal of controls that do not apply to the scoped service (e.g., physical access controls on CSP hardware you do not own).
- Parameterized simplification for a narrow-scope SaaS context.
The 156 focus on access control, audit, configuration management, identification and authentication, incident response, personnel security, system integrity, and communications protection as they apply at the SaaS layer.
Timeline reality
| Phase | Li-SaaS | Low (full) | Moderate |
|---|---|---|---|
| Readiness | 1-2 months | 2-3 months | 2-4 months |
| SSP authoring | 1-2 months | 2-3 months | 3-5 months |
| 3PAO assessment | 1-2 months | 2-3 months | 3-4 months |
| Remediation | 1 month | 2 months | 2-4 months |
| Agency review | 1-2 months | 2-3 months | 1-3 months |
| Total | 5-9 months | 10-14 months | 12-18 months |
Cost delta
A small-firm Li-SaaS authorization typically runs $100K-$250K in 3PAO costs plus internal engineering. Full Low is $200K-$400K. Moderate is $400K-$900K. Annual ConMon is proportionally lower as well.
Ranges are 3PAO assessment fees plus estimated internal engineering cost. Annual ConMon adds 15–25% of initial authorization cost per year.
When Li-SaaS is the right call
- Your service is genuinely low-impact, low-complexity.
- Your service is a utility layered on top of a FedRAMP-authorized platform.
- You are a small firm with limited compliance-engineering headcount.
- You have a time-constrained agency sponsor.
- Your roadmap does not include CUI or PII processing in the next 18 months.
When Li-SaaS is wrong
- Your product handles any CUI, PII, PHI, or financial data. That is Moderate minimum.
- You plan to add such data to the product within 12-18 months. You will end up re-authorizing.
- Your service has many interconnections or federates with multiple identity providers at the agency.
- Your service is a system of record for federal users.
- The agency sponsor wants Moderate from the start. Trying to convince them down is usually harder than just pursuing Moderate.
Common failure mode
A small SaaS firm looks at the cost and timeline of Moderate, decides Li-SaaS is cheaper, and pursues authorization for a product that does not actually meet the Low-impact criteria. Midway through the 3PAO assessment, it becomes clear that the service processes CUI or PII, and the package gets paused and reworked. The rework is more expensive than pursuing Moderate from the start.
Honest FIPS 199 analysis up front is worth more than a compressed timeline. If the analysis says Low, pursue Li-SaaS. If it says Moderate, pursue Moderate. Do not let schedule pressure distort categorization.
Li-SaaS to Moderate: the upgrade
Li-SaaS authorizations can be upgraded to Moderate as the service's scope grows. The upgrade reopens the SSP, maps the additional controls from Low to Moderate (325 - 156 = 169 additional controls on paper, though many are inherited), and reassesses. Six to nine months is a reasonable upgrade timeline. It is cheaper to start at Moderate if you know you will end there.
Bottom line
Li-SaaS is a real accelerator for a narrow category of services — low-impact, low-complexity, platform-layered utilities. For those, expect a 5-9 month authorization. For anything touching CUI, PII, PHI, or financial data, skip Li-SaaS and plan for Moderate. Run FIPS 199 honestly; the wrong baseline choice is a more expensive mistake than the right one implemented slowly.
Frequently asked questions
156 controls, pared down from the FedRAMP Low baseline via inheritance and scope tailoring. Lower implementation burden than full Low (~125 explicit + many inherited).
Services with FIPS 199 Low impact, operating on a FedRAMP-authorized platform, not holding CUI, PII, PHI, or financial data, with limited interconnections and federal data persistence. Marketing analytics, scheduling, survey tools are common fits.
Typical 5-9 months end to end, including readiness. Full Low is 10-14 months. Moderate is 12-18 months.
$100K-$250K in 3PAO fees plus internal engineering for a small firm. Full Low is $200K-$400K. Moderate is $400K-$900K.
Yes, though it is cheaper to start at Moderate if you know you will end there. Upgrade takes 6-9 months of additional engineering and reassessment.
Firms choose it for speed, then discover mid-assessment that the service actually handles CUI or PII, which forces a rework to Moderate. Honest FIPS 199 up front avoids this.