Permanent TSB has become the latest financial institution to raise its standard variable mortgage rate for homeowners.
The bank said it would raise the rate by half a percentage point to 4.19% from Tuesday 3 August.
Permanent TSB said the move would affect around 80,000 customers, adding on average another €17 a month to their repayments.
Chief Executive David Guinane said the decision was due to the continuing high cost to the bank of borrowing money on the international market.
AIB said today that it has no current plans to increase its interest rates, while Bank of Ireland said its rates are under constant review and declined to comment further.