The latest problem with its systems came just days away from Christmas and is just a week after its online banking system and its app went down.
Business Online, used by employers, was down this afternoon, prompting employers trying to process payments for staff expressed frustration.
One commented: “Business Online is not letting me log on. When will it be back online? Wages to pay.”
The bank said its IT staff were examining a problem preventing business customers logging into its system.
It denied it was being hacked and said a short time later the bank said that its business banking system was back online.
Last Friday customers of Bank of Ireland expressed huge frustration after Bank of Ireland’s mobile phone app and its online banking facility went down this morning.
By lunchtime the bank’s systems were back operating, Bank of Ireland said.
The outage has occurred on one of the busiest shopping days of the year, just as Christmas approaches.
The bank had said it was aware of issues for customers accessing its mobile app and 365 Online.
“We are working to resolve this as soon as possible and apologise for any inconvenience,” Bank of Ireland said.
One annoyed customer said she had been unable to access the mobile this morning.
“It won’t let me in. The app goes as far as ‘running security checks’ and then freezes,” she said. Others reported on social media accounts that they could not log in to online banking.
One person posted: “It is telling me I don’t have my devise set up to my account. I do. I used it 10 minutes ago.”
Customers also reported difficulties receiving transfers from AIB to Bank of Ireland accounts.
Customers report regular problems with Bank of Ireland’s online banking and its app.
Two Fridays ago PTSB bank was hit by a big technical issue had been experiencing delays in sending and receiving payments.
Its customers were unable to receive payments, including wages, pensions and other transfers.
Customers also couldn’t make payments, which means some direct debits and standing orders may not get processed on schedule.