PRA SS1/23: UK Implementation of Basel 3.1 Capital Requirements

SS1/23 Overview and Scope

PRA SS1/23 provides comprehensive implementation guidance for Basel 3.1 capital requirements in the UK. The supervisory statement emphasises enhanced challenge requirements for internal model approaches, with particular focus on model validation, governance oversight, and ongoing monitoring procedures.

Challenge Requirements

• Model validation: Independent validation of internal models with comprehensive challenge of assumptions and methodologies
• Governance oversight: Board and committee oversight of model development, validation, and ongoing monitoring
• Supervisory reporting: Regular reporting on model performance, validation findings, and remediation activities

Implementation Timeline

Phased implementation approach with specific milestones for different model categories and banking organization types.

References

• PRA SS1/23 - Basel 3.1 Implementation
• Implementation Timeline