Banking union O-SII scores published by ECB

Other systemically important institutions (O-SIIs) are identified by national authorities and are required to maintain an O-SII capital buffer.

This buffer forms part of a combined buffer requirement, which includes elements like the capital conservation buffer and the countercyclical capital buffer, designed to enhance financial stability.

The European Central Bank (ECB) assesses these O-SII buffer levels using a floor methodology.

In December 2024, this methodology was significantly enhanced to incorporate a banking union perspective, complementing the national perspective that has been in use since 2016.

This enhancement provides a more comprehensive and harmonised view of systemic importance across the euro area, moving beyond purely national considerations.

The current publication presents the O-SII scores derived from this new banking union perspective, utilising data collected as at the end of 2024.

These scores will now be published annually, offering regular insights into the systemic footprint of major institutions within the banking union framework.

The published O-SII scores, presented in basis points, offer a quantitative measure of systemic importance for institutions within the banking union.

Leading institutions like BNP Paribas, Deutsche Bank AG, and Groupe Crédit Agricole received scores of 911, 693, and 677 basis points respectively, placing them in higher buckets of the ECB's floor methodology.

These scores are vital for national competent authorities in determining the O-SII capital buffer requirements for individual banks.

The enhanced methodology ensures a consistent and comparable assessment of systemic risk across the euro area.

The data cut-off date for this report was 28 October 2025.