According to a new survey, that age is 39.
Other age milestones, according to the survey: At 29, the average adult should have a solid group of friends, and by 31, they should have met and fallen in love with "the one."
Other results:
44% of those surveyed said they didn't think they’d ever have their lives completely together.
25% said their love life was a disaster. 16% said their job was the biggest hurdle to getting their lives together.
14% of 18- to 29-year-olds surveyed said they were too young to worry about “grown-up” issues.
78% said they are struggling to stay on top of things. (Click on Detroit)