Since 2015, budget analysis work based on the SUN Approach has been conducted by 50 countries and has provided valuable insights into the nature of government spending allocations to nutrition-specific and nutrition-sensitive areas. The SUN Movement has recognised that there is a growing need to support SUN member countries through replicability and refinement of the budget analysis exercise, often referred to as the “3-Step Approach”. Building off of the previous Budget Analysis for Nutrition: A Guidance Note for Countries (2018), MQSUN+ worked with the SUN Movement Secretariat, country representatives, and technical experts to develop this guidance note. This updated guidance note aims to update the ‘3-Step Approach’ and improve the nutrition-sensitive methodology by refining the guidance for determining budget allocations in SUN countries.