A 401(k) and a pension are two separate things, even though both are retirement accounts

A 401(k) is not a pension. The two are funded differently, managed differently, and pay out differently. A pension is a promise your employer makes to pay you a set amount each month after you retire — the employer puts money in, manages the investments, and bears the risk if the fund runs short. A 401(k) is an account that belongs to you. You decide how much to contribute (up to annual limits set by the IRS), you choose where the money is invested, and you decide when and how much to withdraw after age 59½. Your employer may match part of what you contribute, but the account is yours to manage.

The distinction matters because it changes what you receive, when you receive it, and what happens if you leave your job. Many people have access to a 401(k) through their employer but no pension at all. Some people have both. Understanding which one you have — or will have — affects how much you need to save on your own and what your income will look like in retirement.

Key Takeaways

  • A 401(k) is a savings account you control; a pension is a monthly payment your employer guarantees for life.
  • You contribute to a 401(k) with pre-tax dollars and choose how the money is invested; your employer contributes nothing unless they offer a match.
  • A pension is funded entirely by your employer, who manages the investments and assumes all investment risk.
  • If you leave a job with a 401(k), you take the account with you; if you leave a job with a pension, your benefit depends on vesting rules.
  • Most private employers now offer 401(k)s; traditional pensions are more common in government jobs and some large corporations.

How contributions and funding work differently

With a 401(k), you contribute money from your paycheck. Your employer deducts it before taxes are calculated, which lowers your taxable income for that year. You choose how much to contribute, up to $23,500 per year (as of 2024; this limit changes annually). Your employer may offer a match — for example, matching 50 cents for every dollar you contribute, up to 6 percent of your salary — but they are not required to. Many small employers offer no match at all.

With a pension, your employer contributes the money. You typically contribute little or nothing. The employer is responsible for setting aside enough money today to pay you a monthly benefit decades from now. If the pension fund's investments perform poorly, the employer must make up the shortfall. If the investments do well, the employer may reduce their contributions. You have no say in how the money is invested.

This difference is why pensions have become rare in the private sector. Employers bear all the investment risk and must fund the pension even in bad years. A 401(k) shifts that risk to you — if the stock market drops, your account balance drops, and your retirement income may be lower than you expected.

What you receive and when

A 401(k) is a lump sum that belongs to you. You can withdraw money after age 59½ without penalty. You decide how much to take out each year. Some people spend it all in the first decade of retirement; others stretch it over 30 years. If you die before spending it all, the remaining balance goes to your beneficiary. If you need money before 59½, you can withdraw it, but you will owe income tax plus a 10 percent penalty on the amount withdrawn (with some exceptions, such as hardship withdrawals or loans).

A pension is a monthly check for life. The amount is calculated using a formula based on your salary and years of service — for example, 2 percent of your average salary for each year worked. If you worked 25 years and your average salary was $50,000, your pension might be $25,000 per year, paid in monthly installments of about $2,083. That payment does not change based on market performance. It continues as long as you live. When you die, your spouse may receive a reduced benefit if you chose a survivor option when you retired, but the money does not pass to your other heirs.

Vesting and what happens if you leave your job

A 401(k) is yours immediately. Any money you contribute is vested — it belongs to you — from the moment it is deposited. If your employer matches your contributions, that match money may have a vesting schedule. For example, you might be 25 percent vested after one year, 50 percent after two years, and 100 percent vested after four years. If you leave before you are fully vested, you forfeit the unvested portion of the match. But your own contributions always come with you.

A pension has a vesting schedule set by your employer. You might not be vested at all until you have worked there for five years. Once you are vested, you have a right to a pension benefit, even if you leave the job. However, the amount you receive is usually based on your salary and service at the time you leave, not at retirement. If you leave at age 35 after 10 years of service, your pension will be calculated on those 10 years, not on 30 years of service. If you stay until age 65, your pension will be much larger.

Investment control and risk

With a 401(k), you choose how your money is invested. Your employer provides a list of mutual funds, index funds, and sometimes individual stocks or bonds. You decide what percentage goes into each option. If you choose aggressive investments and the market crashes, your balance drops. If you choose conservative investments and the market booms, you miss out on gains. You bear all the investment risk.

With a pension, your employer's investment team manages the money. You have no control over how it is invested. But you also have no risk — the employer guarantees the monthly payment regardless of how the investments perform. This is why pensions are considered more secure: the payment does not fluctuate based on market conditions.

Tax treatment in retirement

Money you withdraw from a 401(k) is taxed as ordinary income in the year you withdraw it. If you contributed pre-tax dollars (the standard option), the entire withdrawal is taxable. If you contributed after-tax dollars (a Roth 401(k) option, available through some employers), withdrawals are tax-free. You must begin taking withdrawals at age 73 (as of 2023, under the SECURE 2.0 Act); the IRS calculates a minimum amount based on your age and account balance.

Pension payments are also taxed as ordinary income, but the tax is usually withheld automatically from each monthly check. You do not have to decide how much to withdraw — the amount is fixed. Some pensions offer a lump-sum option at retirement, allowing you to take the entire value as a one-time payment instead of monthly checks. If you choose that option, the tax treatment depends on how you handle the money.

Where each type of plan is common today

Most private employers offer a 401(k) or similar plan (such as a 403(b) for nonprofits or 457(b) for government workers). Pensions are rare in the private sector now. They are most common in government jobs — federal, state, and local employees often have pensions — and in some large, established corporations, particularly in industries like utilities, railroads, and unionized manufacturing.

If you work for a small business, you almost certainly have a 401(k) or no retirement plan at all. If you work for a government agency, you likely have a pension. If you work for a large corporation, you may have a 401(k), a pension, or both. Your employee handbook or HR department can tell you which plans you have access to.

Frequently Asked Questions

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

Yes. Some people work for an employer that offers both. For example, a government employee might have a pension and also be able to contribute to a 401(k) or 403(b). If you have both, the pension provides a may provide base income, and the 401(k) is additional savings you control. Contribution limits apply separately to each plan.

What happens to my 401(k) if I leave my job?

The money stays in your account. You can leave it there (if your balance is above a certain threshold, usually $5,000), roll it into an IRA, or roll it into your new employer's 401(k) plan. You cannot cash it out without paying taxes and a 10 percent penalty, unless you are 59½ or older or meet a hardship exception. The account is yours regardless of where you work.

If I leave a job before being vested in the pension, do I lose everything?

It depends on the vesting schedule. If you are not vested, you have no right to a pension benefit from that employer. However, if you are vested, you keep the benefit even after you leave. The amount is based on your salary and service at the time you leave, not at retirement. Check your pension plan documents or ask HR what the vesting schedule is.

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

A pension is more predictable because the payment is may provide for life. A 401(k) requires you to manage the money and decide when to spend it. If you are a disciplined saver and comfortable with investment decisions, a 401(k) can work well. If you prefer may provide income and do not want to manage investments, a pension is more secure. Many financial advisors recommend having both if possible.

Can I convert my 401(k) into a pension-like payment?

Not directly, but you can purchase an annuity with your 401(k) balance. An annuity is an insurance product that converts a lump sum into monthly payments for life, similar to a pension. The payment amount depends on your age, the annuity type, and current interest rates. This is an option some people choose at retirement, though it is not automatic.