Systemically Important Institutions

The objective of the O-SII buffer is to reduce the probability of failure of a systemically important institution. The buffer enhances the resilience of these institutions, which due to the scale or nature of their business are of systemic importance, by providing an additional layer of loss absorbing capital. A higher capital requirement for these institutions acknowledges the greater impact that their failure would have.

Consistent with the purpose of the buffer and the wider capital buffer framework the O-SII buffer is fully available to banks to use during times of stress (e.g. the effects of the COVID-19 pandemic) to absorb the impact of the shock to the economy.

Identified other systemically important institutions and associated buffers (2020)

Institution Buffer rate
Buffer phase-in
1 July 2019 1 July 2020 1 July 2021 1 January 2022
AIB Group plc 1.50% 0.50% 1.00% 1.50% 1.50%
Bank of America Europe DAC1 0.75% 0.50% 0.75% 0.75%
Bank of Ireland Group plc 1.50% 0.50% 1.00% 1.50% 1.50%
Barclays Bank Ireland plc 1.00% 0.50% 0.75% 1.00%
Citibank Holdings Ireland Limited 1.00% 0.25% 0.50% 1.00% 1.00%
Ulster Bank Ireland DAC 0.50% 0.25% 0.50% 0.50% 0.50%

2020 Assessment

Download the 2020 O-SII Assessment

Previous Assessments

Download the 2019 O-SII Assessment | pdf 3MB

2018 O-SII Assessment I pdf 913 KB

2017 O-SII Assessment I pdf 774 KB

2016 O-SII Assessment I pdf 640 KB

2015 O-SII Assessment I pdf 389 KB

Other Systemically Important Institutions O-SIIs: FAQs