It's believed up to 1,100 customers have been overcharged by the banking group
The Irish Independent reports customers at AIB subsidiaries EBS and Haven have been overcharged for years - some as far back as 2006.
It's understood they'll be refunded an average of 6,000 euro, and some have already been contacted by the bank.
It brings to 13,300 the total number of the banking groups customers who've been overcharged in relation to trackers.
