Incumbent halfback Pearce was seen as a certain selection for the NSW team in State of Origin series which starts on May 28 and it remains to be seen what effect the Kings Cross incident has on those chances.
He had helped spark premiers the Roosters to a 30-6 NRL win against Wests Tigers on Friday night.
The Roosters said they were aware of the incident and that the NRL's Integrity Unit had been notified.
"The Sydney Roosters have been made aware that Mitchell Pearce was issued with an infringement notice for failure to quit a licensed premises overnight,'' the statement read.
"The infringement notice was issued and the fine paid.
"The Roosters have advised the NRL's Integrity Unit.
"From here, the club will address the matter internally and will be making no further comment.''
-AAP