The Financial Services Union (FSU) has opened a ballot of its members in AIB on proposed new hybrid working policies at the bank.
In July, AIB said that staff would be required to work in an office-based location for a minimum of three days a week.
At the time, the FSU accused the bank of acting unilaterally and described the announcement as regressive, shortsighted and without justification.
Following negotiations between the two sides, AIB presented the FSU with new proposals including usage of AIB hubs, reviews of pre-existing arrangements, and a commitment to agree any future changed with the union.
The ballot opened today and will close on Wednesday 5 November.
"If our members vote yes, the new hybrid working principles will come into effect on 1 January 2026," FSU General Secretary John O'Connell said.
"If FSU members vote not to accept the new principles the FSU will refer the matter to the WRC," he added.
AIB has said it listened to feedback from staff and has taken on board constructive suggestions from the FSU.
