A 401(k) and a pension are two different ways your employer can save money for your retirement

A pension is a monthly payment your employer promises to give you for life after you retire. Your employer puts money into a fund during your working years, manages that fund, and then pays you a set amount each month starting at retirement. You do not choose how the money is invested.

A 401(k) is a savings account that belongs to you. You put your own money into it (usually taken from your paycheck before taxes), and your employer may add money too. You choose how to invest it from a list of options. When you retire, the money in the account is yours to withdraw — there is no monthly payment from your employer.

The core difference: with a pension, your employer takes the investment risk and guarantees you a payment. With a 401(k), you take the investment risk and you control when and how much you withdraw.

Key Takeaways

  • A pension pays you a fixed monthly amount for life; a 401(k) is a savings account you own and can withdraw from whenever you choose.
  • With a pension, your employer manages the money and bears the investment risk; with a 401(k), you manage it and bear the risk.
  • Pensions are rare in private companies now but still common in government and some union jobs; 401(k)s are the standard retirement savings tool for most private employers.
  • You cannot move a pension to another job, but you can roll a 401(k) to a new employer's plan or to an IRA.
  • If you leave a job with a pension before vesting, you may lose the benefit entirely; if you leave a job with a 401(k), the money stays yours.

How money flows into each plan

With a pension, your employer contributes money on your behalf. You typically do not put money in yourself. The employer hires investment professionals to manage the fund. The amount you receive at retirement is calculated using a formula — usually based on your salary, years of service, and age.

With a 401(k), you decide how much to contribute from your paycheck, up to an annual limit set by the IRS (the limit changes each year). Your employer may match part of what you contribute — for example, matching 50 cents for every dollar you put in, up to 6 percent of your salary. But the match is optional; not all employers offer one. You then pick from a menu of investment options (usually mutual funds or target-date funds) and decide how to split your contributions among them.

What happens to the money when you retire

With a pension, you stop working and your employer starts sending you a monthly check. That check continues for the rest of your life, no matter how long you live. Some pensions offer a choice at retirement: take a smaller monthly payment that continues to your spouse after you die, or take a larger payment that stops when you die. The amount you receive is fixed and does not change with inflation (though some pensions do adjust for inflation over time).

With a 401(k), the money is yours to manage. You can leave it in the account and withdraw it slowly, withdraw it all at once, or roll it into an IRA or your new employer's plan. You must start taking withdrawals by age 73 (this age changes periodically). If you withdraw money before age 59½, you typically pay a 10 percent penalty plus income tax, with some exceptions. There is no may provide the money will last your whole life — if you run out, there is no employer backup.

Vesting: when the money becomes yours

With a pension, you must work at the company for a certain number of years before the pension benefit is yours to keep. This is called vesting. Vesting schedules vary: some pensions vest after 5 years of service, others after 10. If you leave before you are vested, you lose the pension entirely. Once you are vested, the benefit is yours even if you quit the next day.

With a 401(k), your own contributions are yours immediately — vesting does not apply to your money. But your employer's matching contributions may have a vesting schedule. For example, your employer's match might vest 25 percent per year, so after four years it is all yours. If you leave after two years, you keep your contributions and half the match, but lose the other half. Check your plan documents to see your employer's vesting schedule.

Portability: moving the money to a new job

A pension is not portable. If you leave your job, you cannot take the pension with you. You keep the right to the monthly payment (if you are vested), but it stays with your former employer's plan. You receive it starting at your plan's retirement age, which may be different from when you actually stop working.

A 401(k) is portable. When you leave a job, you can roll the money into your new employer's 401(k) plan, into an IRA, or leave it with your former employer (if the balance is above a certain amount, usually $5,000). Rolling it over keeps the money growing tax-deferred. If you withdraw it directly instead of rolling it over, you owe income tax and possibly a 10 percent penalty.

Risk and who bears it

With a pension, your employer bears the investment risk. If the stock market crashes and the pension fund loses money, your employer must still pay you the promised amount. If the company goes bankrupt, the Pension Benefit Guaranty Corporation (PBGC), a federal agency, steps in and pays a portion of your pension (up to a limit that changes yearly). You are protected from market downturns and company failure.

With a 401(k), you bear the investment risk. If you invest heavily in stocks and the market crashes, your account balance drops. There is no federal may provide. However, you also benefit if the market rises — your account grows. You have control over how much risk you take by choosing conservative or aggressive investments.

Availability today: which plans still exist

Pensions are uncommon in private companies. Most large private employers stopped offering them in the 1980s and 1990s. Today, pensions are standard in government jobs (federal, state, and local), the military, and some union positions. If you work for a city, county, state, or the federal government, you likely have a pension option.

401(k)s are the standard retirement savings tool for private employers. Most companies with more than 50 employees offer one. Some small employers offer SIMPLE IRAs or SEP IRAs instead, which work similarly but have different contribution limits and rules. If your employer offers a 401(k), that is your main retirement savings vehicle — there is usually no pension.

Frequently Asked Questions

Can I have both a pension and a 401(k)?

Yes. Government employees often have both — a pension from their government job and a 401(k) or similar plan. Some union jobs also offer both. If you work in the private sector, you typically have only a 401(k). Check your employer's benefits summary to see what you have.

What if I leave my job before I am vested in the pension?

You lose the pension benefit. The money your employer contributed on your behalf stays in the pension fund. You receive nothing. With a 401(k), you keep your own contributions and any vested portion of the employer match, even if you leave immediately.

Can I withdraw from my 401(k) before retirement?

You can, but it usually costs you. Withdrawals before age 59½ are subject to a 10 percent penalty plus income tax. Some plans allow loans or hardship withdrawals with fewer penalties. A pension does not allow early withdrawal — you must wait until your plan's retirement age.

Which is better for retirement: a pension or a 401(k)?

A pension is more secure because your employer guarantees a payment for life. A 401(k) gives you more control and portability, but requires you to manage the money and make it last. If you have a pension option, it is usually worth taking. If you only have a 401(k), contribute enough to get your full employer match.

What happens to my pension if my employer goes out of business?

If the company is private, the PBGC takes over and pays a portion of your pension (the amount varies by year and your age). If the employer is a government agency, pensions are typically protected by state law and do not depend on the agency's finances. Check your pension plan documents or contact your plan administrator for specifics.