The deadline had initially been set for midnight yesterday, May 28th.
A spokesperson for Revenue said it had taken the step to extend it due to the unprecedented volume of phone calls in the build-up to the deadline.
The spokesperson said there were 10,000 people filing over the phone and online every hour in the lead up to the decision.
Earlier Revenue reported a surge of quarter of a million people filing Local Property Tax returns since yesterday morning.
It had received 1.44m returns by 5pm yesterday evening, indicating a compliance rate of over 80%.
Revenue sent 1.66m notifications to liable property owners and had hoped to achieve compliance of 80% or above by the end of the year.
The Revenue Commissioners’ Local Property Tax helpline can be contacted at 1890-200-255.