MAP20260004167 Choudhary, Mahipal Marathon effort / Mahipal Choudhary Sumario: The article, written from an actuary's perspective, describes the demanding transition to the IFRS 17 accounting standard within an insurance company. It highlights how the project required not only technical changes but also a deep cultural and organizational transformation. The text outlines key stages such as impact assessment, process redesign, system integration, and cross-functional collaboration between actuarial and finance teams. It also notes challenges like parallel runs and ongoing adjustments, as well as benefits including greater transparency, clearer performance drivers, and improved communication with investors. Ultimately, it concludes that IFRS 17 is an evolving framework that promotes continuous learning and long-term value creation En: The Actuary : the magazine of the Institute & Faculty of Actuaries. - London : Redactive Publishing, 2019-. - 02/02/2026 Number 7 - February 2026 , p. 50 - 52 1. IFRS 17 . 2. Reporting financiero . 3. Cálculo actuarial . 4. Transparencia financiera . 5. Requerimientos financieros . 6. Normas internacionales de información financiera . I. Institute of Actuaries (London) . II. Title.