Not CUI Compliant
4 NIST 800-171 gaps detected. Not FedRAMP authorized. Consumer-grade HR/payroll. Very popular among startups entering GovCon without understanding compliance requirements.
Gusto
by Gusto
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
HR & Payroll
Overview
Gusto is a popular HR and payroll platform among startups and small businesses. It is cloud-only with no government-specific offering and no FedRAMP authorization. Many small companies entering defense contracting use Gusto without understanding they need to assess whether payroll data intersects with CUI.
CUI Risk Assessment
Not FedRAMP authorized. Consumer-grade HR/payroll. Very popular among startups entering GovCon without understanding compliance requirements.
Using Gusto in a Defense Contractor Environment
Gusto represents a significant compliance risk for defense contractors handling CUI, as it typically processes employee PII, financial data, and potentially ITAR-controlled personnel information for employees working on defense contracts. Within a CMMC Level 2 authorization boundary, Gusto would need to be included as it handles CUI derived from employee access to controlled technical information and export-controlled data. The platform's cloud-only architecture with no FedRAMP authorization violates fundamental CUI protection requirements. DCMA assessors consistently flag Gusto during CMMC readiness reviews, particularly noting its lack of encryption controls meeting FIPS 140-2 requirements and inadequate audit logging for CUI access. Compensating controls are insufficient given Gusto's consumer-grade security posture - contractors cannot implement NIST 800-171 controls like media protection (3.8.1) or system integrity monitoring (3.13.8) on vendor infrastructure they don't control. Recent DIBCAC reviews have specifically cited Gusto as an example of 'shadow IT' that creates systemic compliance failures, particularly where contractors use it for payroll without realizing employee data intersects with security clearance and ITAR export control requirements.
Deployment & Architecture
Deployment Model: Cloud SaaS (vendor-hosted)
Gusto lacks FedRAMP authorization. Using this tool for CUI processing violates DFARS 252.204-7012 requirements. Defense contractors must evaluate FedRAMP-authorized alternatives or implement and document compensating controls in their POA&M.
Migration Guidance
Defense contractors using Gusto must migrate to FedRAMP-authorized solutions within 90-120 days to maintain DFARS compliance. Phase 1 (weeks 1-4): Conduct data inventory to identify all CUI within Gusto including employee records with security clearance indicators, export control training records, and payroll data for ITAR-controlled positions. Export all historical data while maintaining CUI handling procedures during extraction. Phase 2 (weeks 5-8): Implement replacement solution such as ADP Workforce Now (FedRAMP Moderate) or Workday HCM (pursuing FedRAMP authorization), ensuring new platform handles required CUI markings and access controls. Phase 3 (weeks 9-12): Complete data migration with verification of CUI protection controls, update SSP sections 2.3 (authorization boundary) and 8.1 (interconnections), and modify POA&M entries related to HR system compliance. User training requires 8-16 hours per administrator focusing on CUI handling procedures. Update authorization boundary diagrams to reflect new HR system placement within the CUI environment. Migration costs typically range $25,000-$75,000 for organizations under 500 employees, including licensing, implementation services, and compliance documentation updates.
Migration Checklist
- 1ISSO must immediately add Gusto to POA&M as a high-risk finding under NIST 800-171 controls 3.1.1, 3.8.1, 3.13.8, and 3.13.11.
- 2Contracts officer should review all active contracts to determine if employee data in Gusto constitutes CUI under DFARS 252.204-7012 requirements.
- 3ISSO must conduct risk assessment documenting specific CUI categories processed by Gusto including employee PII with security clearance levels.
- 4System administrator should implement immediate data export procedures to extract all CUI from Gusto while maintaining proper CUI markings.
- 5ISSO must update authorization boundary diagram removing Gusto from CUI processing environment and documenting compensating controls if temporary retention required.
- 6Procurement team should initiate vendor evaluation for FedRAMP-authorized HR solutions meeting CMMC Level 2 requirements within 30 days.
- 7Legal counsel must review Gusto service agreement to identify data residency violations and notification requirements for CUI exposure.
- 8ISSO should update SSP section 2.3 to reflect Gusto removal from authorization boundary and document replacement system security controls.
Compliance Cross-References
Gusto's non-compliance creates cascading failures across multiple NIST 800-171 control families: Access Control (AC) violations due to inability to implement role-based access for CUI (3.1.1), System and Communications Protection (SC) failures from lack of FIPS 140-2 validated encryption (3.13.8, 3.13.11), and Media Protection (MP) violations from uncontrolled cloud storage (3.8.1). These deficiencies directly trigger DFARS 252.204-7012 non-compliance, requiring immediate corrective action under clause (f)(2). For CMMC Level 2 assessments, Gusto failures impact Access Control (AC.L2-3.1.1) and System and Information Integrity (SI.L2-3.14.1) assessment domains, creating systemic findings that can result in practice-level deficiencies. The tool's consumer-grade architecture prevents implementation of required security controls, making it incompatible with FedRAMP Moderate baseline requirements that govern CUI systems, ultimately forcing defense contractors into fundamental authorization boundary redesign to maintain contract compliance.
NIST 800-171 Violations
Using Gusto for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
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Frequently Asked Questions
Can I keep using Gusto as a defense contractor?
If your payroll and HR data does not include CUI, Gusto may be acceptable with documented risk acceptance. However, Gusto lacks the government compliance features of ADP or Paychex and has no path to FedRAMP authorization.
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