Building Societies Association

The Building Societies Association (BSA) is the trade body that represents all building societies and several large credit unions in the United Kingdom. It was established in 1869 under the original name Building Societies Protection Association, with the aim of coordinating a collective response to proposed government changes that threatened stamp duty exemptions for mutual lenders.

As of 2024, the BSA represents 49 member institutions, comprising 42 building societies and 7 credit unions, which together serve approximately c. 26 million customers across the UK.

The association advocates on behalf of its members in relation to financial services regulation, legislation, and policy developments in both the UK and Europe. It also provides research, public affairs support, and guidance for the mutual sector, with a focus on ensuring a sustainable and competitive environment for member institutions.