The overall World Cup title is considered the most prestigious in skiing because it covers all disciplines over a whole season.
Hirscher said he had not decided whether to continue racing next season.
"We have to talk things over in the summer. That decision will be the toughest of my life," he told reporters. "I can't say how it will go. My head's a bit crazy at the moment."
Hirscher equalled the record of 20 overall and discipline World Cup titles set by American Lindsey Vonn who retired last month.
Vonn won four overall, eight downhill, five super-G and three combined titles while Hirscher has won eight overall, six giant slalom and six slalom titles.
Ramon Zenhaeusern of Switzerland won Sunday's race and Henrik Kristoffersen of Norway was second.
(Writing by Brian Homewood; Editing by Ken Ferris)
