On October 7, 2026, the Monetary Authority of Singapore issued its final Guidelines on AI Risk Management, and the clock is now running. Every financial institution in Singapore has until October 7, 2027 to meet the core supervisory expectations, with the remaining sections due by October 7, 2028. The Guidelines apply to all FIs and all forms of AI, from a chatbot embedded in a support tool to autonomous agentic systems. Here’s the part most coverage will miss: the most commercially significant clause is not aimed at banks at all. MAS makes financial institutions fully accountable for third-party AI, including AI developed, operated, or provided by vendors. FIs must obtain sufficient assurance from those providers, and if they cannot, MAS expects them to limit, suspend, or replace the service. If you sell AI-powered software to banks, insurers, payment firms, or asset managers with a Singapore presence, that sentence is about you. Over the next twelve months, your FI customers will start asking how your AI is governed, and a security questionnaire alone won’t answer the question. This article covers what the Guidelines require, why vendors are effectively in scope, and how ISO 42001, the international standard for AI management systems,