He served 10 days of a 15-day sentence resulting from his June driving under the influence arrest, the Las Vegas Sun reported.
Neil, 50, will now serve 15 days under house arrest. His girlfriend, KSNV-TV entertainment reporter Alicia Jacobs, announced his release on her Twitter page.
"My great day just got even BETTER!! He's finally HOME!" Jacobs tweeted.
He was visited in jail by comedian Carrot Top, who said, "I would not do well in jail."
Motley Crue is scheduled to begin a world tour in April. It will pass through Las Vegas at least once.