Permanent TSB Group Holdings plc, formerly Irish Life and Permanent plc and trading as PTSB is a provider of personal financial services in Ireland. Irish Life Assurance plc and the Irish Permanent Building Society merged to form the Irish Life and Permanent Group in 1999, and the merged entity acquired the Trustee Savings Bank in 2001. The group has no connection to the UK's TSB Bank.

The bank is historically derived from three different companies:

Irish Life Assurance plc (founded 1939) and the Irish Permanent Building Society (founded 1884) merged to form the Irish Life and Permanent Group in 1999, and the merged entity acquired the Trustee Savings Bank (founded 1816) in 2001.

Irish Life was a life assurance company created in 1939 with state assistance and concentrated on life assurance and investment products.

were amalgamated.

Later some British companies shed their Irish operations, and merged them into this new company. They were:

Shares in the business were sold to the public in July 1991. In 1965 Irish Life entered the UK market and competed against its former parent, initially under its own name.

In 1999, Irish Life Assurance plc and the Irish Permanent Building Society merged to form the Irish Life and Permanent Group. In March 2012, Irish Life Assurance was sold to the Irish State for €1.3 billion as part of a bank recapitalisation programme following the Irish financial crisis.