If you are one of the roughly 15% of private-sector workers who still has a traditional pension, you own something rare.
Everyone else is running a 401(k)-style plan, which means the outcome depends heavily on what you contribute and how markets behave.
Pensions and 401(k)s work in opposite directions.
A pension promises a set monthly check for life, usually based on your salary and years of service.
A 401(k) is an account you fund yourself, often with an employer match, and the balance is whatever it grows into by the time you stop working.
The biggest difference is who carries the risk.
With a pension, your employer (backed by a federal insurance program) absorbs market swings and longevity risk.
A bad decade right before retirement can permanently shrink what you can safely withdraw.
That does not automatically make pensions better.
Pensions can freeze, and if the company fails, the Pension Benefit Guaranty Corporation covers only part of what you were promised, up to set limits.
A 401(k) balance is yours immediately and travels with you when you change jobs.
For most workers today, the question is not either-or.
It is how to squeeze the most out of a 401(k) that was never designed to replace a pension.
Three moves matter more than picking funds: contribute at least enough to capture the full employer match, keep fees low, and raise your contribution rate every time you get a raise.
The match is the closest thing to free money in personal finance.
A common formula is 50 cents per dollar up to 6% of pay, which works out to an instant 50% return on that portion.
Skipping it is the single most expensive mistake in retirement planning.
A fund charging 1% a year versus 0.05% can cost six figures over a career.
Index funds tracking broad market benchmarks are widely available inside most 401(k) menus and usually cost a fraction of actively managed options.
Contribution limits for 2025 sit at $23,500 for workers under 50, with a $7,500 catch-up for those 50 and older and a larger catch-up for ages 60 to 63.
Many employers also let you set an automatic annual escalation, so your savings rate climbs without you thinking about it.
If you split a career between a pension job and a 401(k) job, both can pay off.
A smaller pension plus a solid 401(k) balance can replace more income than either alone, and the pension portion gives you a steadier base to draw from when markets drop.
Leaving before you vest in a pension can wipe out the benefit entirely.
Vesting schedules typically run three to five years, so check your plan document before you accept that offer across town.
The retirement you get is mostly a math problem, not a loyalty test.
Know what you have, fund it hard, and check the fees.
Our take: most Americans will retire on a 401(k) whether they like it or not, so treat the match as mandatory and fees as a threat.
Final Thoughts
If you are lucky enough to have a pension, read the vesting rules before you make any move.