Financial adulthood has moved to the 30s: ‘the decade when people come to terms with where they are in life’

For most of American history, financial adulthood arrived with a recognizable set of keys: the house keys, the car keys, the filing cabinet where you kept the insurance paperwork.

The timing was fairly predictable—late 20s, early 30s at the outside.

Then it took a while longer to get the keys.

A new survey from fintech company Chime, which commissioned a poll of 3,000 U.S. adults as part of its Millennial Money Report, suggests the answer is yes, in a specific and measurable way.

Eighty-four percent of millennials say their 30s triggered a fundamental shift in how they think about money: what success means, how to measure it, and whether the old benchmarks still apply.

The mindset recalibration that used to accompany the first mortgage and the first kid now arrives on its own schedule, decoupled from the milestones that used to produce it automatically.

“Eighty-four percent of millennials said that their 30s prompted a reevaluation of objectives and goals,” Aaron Terrazas , an independent economist who led the survey, told Fortune .

The report spans 2,000 nationally representative millennials, divided into three equally sized cohorts — elder, core and younger — with comparison samples of 500 Gen X and 500 Baby Boomers.

Terrazas described the split within the millennial generation itself as one of the sharpest findings.

Both ends of the generation are technically the same generation.

But on nearly every financial attitude measured, they behave like different ones.

The fault line runs through 2008 Millennials born before 1991 came of age directly into the financial crisis and those born after watched it happen as kids.

The divergence in outcomes is visible in the data, according to Terrazas and the Chime study.

Older millennials are far more likely to have taken on extra income out of pure survival instinct—42% of elder millennials say a single paycheck simply wasn’t enough, compared to 31% of younger ones.