Many Americans in that age range have no savings at all or lack the expertise and time to determine whether their employers' retirement plan is a good one.
The average 401(k) plan balance hit $91,800 in the first quarter of this year and some savers reached balances as high as $251,600, according to Fidelity, which manages the single largest chunk of the nation's retirement plan assets.
However, many financial advisors recommend people save as much as 12 times their income during their final years of employment. By that calculation, someone with the average 401(k) balance would have been earning an annual income of only $7,500 in their final year. Those at the tail end of this spectrum would have had a final income of only $21,000.
The figures seem to reflect socio-economic patterns as well.
"The results are tilted in favor of the wealthiest Americans, so the bottom half of the baby boomers, by wealth level, had only 4% of the retirement assets," she says. "The wealthiest 10% had 56% of the retirement assets." The same is true when you look at minority groups, she adds:
But, the figures get more intimidating.
"We are going to see worse numbers in the future," says Bailey Childers, executive director of the National Public Pension Coalition in Washington DC
She argues that most 401(k) plans simply "do not work."
Still, there are some tips one can consider when evaluating their pension plans.
Financial journalist Suzanne McGee write in The Guardian, "One big warning sign is a plan that is heavily weighted to high-cost mutual funds — or worse still, the company's own stock. It's rarely a good idea to borrow against your 401 (k) balance unless you're desperate; it's always a good strategy to take advantage of an employer's offer to match your contributions — even though Americans leave an estimated $ 24bn a year on the table at present.