As countries recover from COVID-19 pandemic, there are growing calls across societies to build forward better, more inclusively and greener, and accelerate the transition to net zero-carbon economies. This Guidance Note draws on the experiences in climate budgeting that emerge from Asia-Pacific countries and captures emerging global trends with adopted principles and steps involved. It builds on the work of UNDP as a technical partner in the Coalition of Finance Ministers for Climate Action. It aims to provide the necessary information with a systematic approach to policy makers and practitioners for integrating climate change into budgets and strengthening climate policy planning and budgeting, with a focus on Medium-Term Budgeting.