Deposits at banks covered by the government guarantee fell by €600m in November.
Figures from the Department of Finance show a 0.4% drop in deposits during the month to €154.1 billion.
It's the second-highest level of monthly withdrawals from Irish banks since the state-funded recapitalisation was completed in August 2011.
The Department said the outflow of funds during November was due mostly to "retail movements", meaning withdrawals by consumers as opposed to corporate depositors.
In a statement the Department said it was "encouraging that as advertised deposit interest rates for both corporate and retail customers continue to trend lower across the sector that deposit volumes have remained stable in the second half of the year".
Overall deposit levels at Irish banks have increased by €14.1 billion since the recapitalisation was completed.
