Household deposits in banks here stood at a record high of €101 billion at the end of last year, according to figures from the Central Bank.
The level of household deposits passed €100 billion for the first time in 2017.
Lending for house purchase showed a net increase in 2017 for the first time since 2009.
New lending outpaced repayments by €45 million.
In the month of December, mortgage loans increased by €199 million.
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Developments in loans and deposits mean that Irish households continued to be net funders of the Irish banking system.
Banks held €10.8 billion more in household deposits than loans at the end of December.
That contrasts to the situation in May 2008 when household loans exceeded deposits by €72.6 billion.
