A 401(k) offers portability and personal control but no guaranteed payout, while a traditional pension offers a fixed monthly benefit for life but ties that benefit to one employer and caps protection if the plan fails. Neither is universally "better" — the right answer depends on how long you expect to stay with one employer, how comfortable you are managing investments, and how much certainty you want in retirement.
Both plans aim to replace income after you stop working, but they put the risk in different hands. A 401(k) puts the investment risk and the contribution decisions on the employee. A pension puts the investment risk and the funding obligation on the employer, backstopped by federal insurance when a plan can't pay what it promised.
Table of Contents
- How Each Plan Actually Pays Out
- Who Still Has Access to Each Type
- What Happens If a Pension Plan Fails
- Is Pension Insurance Actually at Risk Today?
- Contribution Limits and Portability for 2026
- Frequently Asked Questions
How Each Plan Actually Pays Out
A 401(k) is a defined-contribution plan: you and often your employer put money into an individual account, you choose the investments, and your retirement income depends entirely on how much was contributed and how the markets performed. The balance can fall as well as rise, and there's no guaranteed floor. Average participant balances at Vanguard and Fidelity reached record highs in 2025 after the S&P 500 gained roughly 16%, according to year-end data reported by Vanguard and Fidelity — but that same exposure to market swings works in reverse during a downturn. A pension is a defined-benefit plan: the employer promises a specific monthly payment for life, calculated by a formula that typically factors in salary and years of service.
The employer, not the employee, is responsible for investing enough to cover that promise, and for making up any shortfall. The gap between the two numbers Vanguard reported for 401(k) savers shows why "average" balances can mislead. Vanguard's average 401(k) balance hit $167,970 in 2025, but the median — the midpoint where half of savers have more and half have less — was only $44,115, according to Vanguard's data. A small number of large, long-tenured accounts pull the average well above what a typical saver actually has.
Who Still Has Access to Each Type
Traditional pensions have become rare in the private sector. Among private-sector workers whose employer offers any retirement plan, 70% had access to a 401(k)-style defined-contribution plan as of March 2025, compared with just 14% who had access to a traditional defined-benefit pension — down from 20% in 2010, according to the Bureau of Labor Statistics' National Compensation Survey. That shift means most workers today are not actually choosing between a 401(k) and a pension — they're choosing how to make the most of a 401(k), because a pension simply isn't on offer.
Pensions remain more common in government jobs, certain unionized industries, and a shrinking number of legacy corporate plans. For the minority of workers who do have a pension available, it's often paired with a 401(k) rather than offered as a replacement for one. In that case the question isn't "which one" but how to weigh a guaranteed base income against a self-directed account that can grow faster — or shrink — depending on the market.
What Happens If a Pension Plan Fails
Pensions carry a safety net that 401(k)s don't need, because 401(k) balances belong to the individual and can't be lost to employer insolvency. A qualified private-sector pension is insured by the Pension Benefit Guaranty Corporation (PBGC), which steps in with a guaranteed benefit if a plan terminates underfunded, according to PBGC. That guarantee has limits.
For a single-employer plan terminating in 2026, the maximum insured benefit for a 65-year-old retiree taking a straight-life annuity is about $93,477 a year, or $7,789.77 a month — so a higher earner in a failed plan can still lose part of what they were promised, per PBGC's 2026 maximum guarantee table. The protection is thinner still for multiemployer pensions, the kind typically found in union-negotiated industries covering multiple companies. PBGC's guarantee there tops out at $35.75 per month for each year of credited service — about $12,870 a year for someone with 30 years of service — and that figure hasn't changed since plans that became insolvent after December 22, 2000, according to PBGC's multiemployer guarantee schedule.
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- Check whether your pension is single-employer or multiemployer — the guarantee caps differ substantially.
- A pension benefit above the PBGC cap is only at risk if the plan actually terminates underfunded, not simply because a cap exists.
- A 401(k) has no equivalent insurance need, since the account is owned outright by the employee.
Is Pension Insurance Actually at Risk Today?
Despite the caps, most pensions in solvent plans aren't operating anywhere near guarantee-limit risk right now. PBGC's own insurance programs were financially sound as of fiscal year 2025: the single-employer program's net position rose to $62.2 billion, up from $54 billion in fiscal year 2024, and the multiemployer program's net position rose to $2.6 billion, according to PBGC's FY2025 Annual Report.
That financial strength matters because it means the PBGC caps described above are a backstop for the rare case of a plan failing, not a sign that failure is common or imminent. A worker in a well-funded pension plan today is unlikely to ever see the guarantee limits come into play.
Contribution Limits and Portability for 2026
For workers relying on a 401(k), the IRS raised the 2026 employee contribution limit to $24,500, up from $23,500 in 2025, with an additional $8,000 catch-up contribution allowed for workers age 50 and older, and a larger $11,250 catch-up for those ages 60 to 63, under IRS Notice 2025-67. Maximizing those limits, especially the age-based catch-ups, is one of the few levers a 401(k) saver controls directly. Portability is the other structural difference worth weighing.
A 401(k) balance belongs to the employee and moves with them to a new job, rolled into a new employer's plan or an IRA without losing value. A pension benefit, by contrast, is typically tied to years of service with a single employer, and can be reduced or forfeited entirely if an employee leaves before the plan's vesting schedule is satisfied. Someone who changes jobs frequently captures far less value from a pension formula than someone who stays decades with one employer — a trade-off not covered by any single contribution limit or insurance rule, but consistent across how the IRS, BLS, and PBGC each describe the two systems.
Frequently Asked Questions
Can I have both a 401(k) and a pension?
Yes. Some employers, particularly in government and certain unionized industries, offer both, letting a worker combine a guaranteed pension base with a self-directed 401(k) for additional growth.
Does PBGC insurance cover 401(k) plans?
No. PBGC insures traditional defined-benefit pensions only; a 401(k) balance is individually owned and isn't exposed to employer insolvency the way an underfunded pension is.
What happens to my pension if I switch jobs before vesting?
The benefit tied to that employer's plan can be reduced or forfeited, since pension formulas are built around years of continuous service, unlike a portable 401(k) balance.
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