The International Association of Insurance Supervisors (IAIS) has published guidance for supervisors on the practical aspects of implementing a risk-based solvency (RBS) regime. Developed by the Risk-based Solvency Implementation Forum in cooperation with the International Monetary Fund (IMF), the document draws on the experiences of several IAIS members and sets out key considerations for RBS design and implementation. The guidance emphasises that moving to RBS is a medium- to long-term project, and that programme design will vary by jurisdiction depending on the legal system, supervisory resources, and the preferences of supervisors and industry stakeholders. It outlines core elements of a project plan, including the role of continuous stakeholder engagement, and highlights that implementation requires cultural change for both supervisors and the insurance sector that needs careful management. The IAIS will host a public webinar on 26 June 2025 (13:00–14:00 CEST) to present the guidance and respond to audience questions.