The Building Societies Association or BSA is the voice for building societies and for some other mutual financial service providers. Together these organisations serve over 23 million customers up and down the length of the UK and have total assets of over £366 billion.
Including their subsidiaries, they hold residential mortgage balances of over £284 billion - this equates to 22% of all outstanding mortgages in the UK. They also hold over £262 billion of retail deposits - 18% of all such deposits in the UK - including 33% of cash ISA balances. They employ approximately 40,000 full and part-time staff and operate through approximately 1,550 branches.