The bank has 76 branches throughout the State.
It comes as Bank of Ireland is closing a third of its network, with fears AIB may also eventually shut some of its 200 branches and 70 EBS offices.
Director for retail banking at Permanent TSB Patrick Farrell said the bank was investing €5m in its branch network in the coming years.
This comes on the back of an investment of €20m in its branch network in the past two years, including upgrading some branches, increased customer training for branch staff and investments in new technology in branches.
Speaking in the bank’s state-of-the-art branch in Omni Shopping Centre in Santry in Dublin, Mr Farrell said the bank has introduced what it calls Quick Banking Machines into 44 branches.