If you have a pension, you already know you're part of a shrinking club.
Private-sector pensions covered about 35% of American workers in the early 1990s.
Today, that number sits closer to 15%, according to Department of Labor data.
Most people now get a 401k instead, or nothing at all.
The two plans work in completely opposite ways.
A pension promises a set monthly check for life, usually based on your salary and years of service.
A 401k is a pot of money you build yourself, and how long it lasts depends on how much you saved and how you invest it.
On paper, a pension looks like the safer deal.
You don't have to guess how long you'll live or worry about a bad stock market year.
But there's a catch: you have to stay at that employer long enough to vest, often five years.
Leave too early, and you could walk away with far less than you expected.
A 401k gives you something a pension can't — control.
You decide your contribution rate, your investments, and when you tap the money.
You also own it from day one, so switching jobs doesn't cost you anything.
The trade-off is that the entire burden of saving enough falls on you.
Here's where the math gets uncomfortable.
Financial planners often suggest replacing 70% to 80% of your pre-retirement income.
A traditional pension formula, say 1.5% of your final salary times years worked, can get a 30-year employee close to that target without them lifting a finger.
A 401k only gets there if you contribute steadily for decades.
Many companies match 50% of your contributions up to 6% of pay, which is free money you should never skip.
A pension has no match — the employer funds the whole thing.
But pensions also come with funding risk.
Underfunded plans can freeze benefits or push cuts onto retirees, and that has happened to millions of workers.
Taxes hit both plans, just at different times.
Traditional 401k contributions lower your taxable income now, but withdrawals get taxed in retirement.
Pensions are usually funded with pre-tax dollars too, so the monthly check is taxable.
A Roth 401k flips this: no upfront break, tax-free withdrawals later.
Most pensions pay nothing until retirement age.
A 401k lets you borrow against it or take a hardship withdrawal, though you'll pay a 10% penalty before age 59½ on top of income tax.
If you can land a pension and stay long enough to vest, it's hard to beat a guaranteed lifetime check you can't outlive.
If you don't have that option, a 401k is still a solid tool, but only if you actually use it.
Target at least 15% of your income, including the match, and review your investments once a year.
The bigger lesson is that neither plan saves you on autopilot.
Final Thoughts
Whichever you have, the workers who end up fine in retirement are usually the ones who checked their statements, kept their fees low, and didn't cash out early.