Bank of Ireland has increased its interest rates on variable and tracker mortgages after citing turbulence in global money markets.
The move has been taken without any similar move by the European Central Bank to increase its base rate.
Mortgage holders in Bank of Ireland and ICS Building Society, which is owned by the bank, will see the rate changes take effect from next Tuesday.
The standard variable rate will increase by 0.1 per cent to 5.44 per cent (5.6 per cent
APR), and the tracker rates will see rises of between 0.1 per cent and 0.25 per cent.
"Turbulence in the money markets has lead to an increase in the cost at which banks borrow in the market place," said Joe Larkin, head of personal lending, Bank of Ireland.
"This in turn leads to an increase in the cost of mortgages. This has been well signalled over the last number of months," he added.