Amid the growing financial vulnerabilities posed by climate change, we investigate macroprudential capital buffers to mitigate systemic risks and increase the resilience of the bankingsector. Leveraging granular data and state-of-the-art stress testing methods, we quantifypotential bank losses attributed to climate-related transition risks. Focusing on short-termtransition scenarios, we document a significant variance among banks in their risk exposure, with the most exposed institutions b