Gen Zers are the most retirement-conscious generation ever. A staggering 70% have some sort of retirement plan, whether employer-sponsored or self-administered. Gen Zers started saving for their retirement at age 19. Compare that to millennials (age 25), Gen Xers (age 30), and baby boomers (age 35). Gen Zers anticipate needing to save $500,000 for retirement, however, which may prove to be an underestimate given that financial experts tend to peg the number higher at as much as $2 million.