A spokesman for the Irish Payment Services Organisation has said that some payments - including salaries and pensions - into people's accounts may be delayed for a few hours because of the bank holiday across most of Europe yesterday.
Most clearing houses were closed across Europe yesterday and so payments to banks were delayed.
Irish banks only received funds from Europe at about 10am this morning - usually funds would have arrived much earlier at around 6am or 7am.
The banks will process the payments during the morning and funds should be in people's accounts this afternoon.
The IPSO spokesman noted that people working in the HSE, teachers and many others actually got paid a day early because of the bank holiday in Europe yesterday.
A spokeswoman for the Department of Social Protection said payments made to banks will be in accounts by the close of business today at the latest.