A pension and a 401(k) are not the same thing

A pension is a monthly payment your employer promises to give you after you retire, based on how long you worked there and how much you earned. A 401(k) is a savings account you fund yourself during your working years, with money taken from your paycheck before taxes. The employer may add money to it, but you own the account and decide how it is invested. When you retire, you get to keep whatever is in the account — there is no may provide monthly payment.

The core difference is who bears the risk. With a pension, your employer promises a specific amount each month for life, and the employer's investment choices determine whether that promise holds. With a 401(k), you bear the investment risk: if the market drops, your balance drops, and your retirement income depends on how much you saved and how well your investments performed.

Most private employers today offer 401(k)s. Pensions are now rare in the private sector but remain common in government jobs, police and fire departments, and some union positions. Some employers offer both.

Key Takeaways

  • A pension pays you a fixed monthly amount for life after retirement; a 401(k) is a savings account you own that you withdraw from as needed.
  • With a pension, your employer guarantees the payment and manages the investments; with a 401(k), you choose how the money is invested and keep whatever grows.
  • Pensions are most common in government and union jobs; 401(k)s are the standard in most private companies.
  • You cannot have a pension and a 401(k) from the same employer at the same time, but you can have a pension from one employer and a 401(k) from another.

How a pension payment works

When you retire from a job that offers a pension, you contact the pension plan administrator — usually the human resources or benefits department — and request to begin receiving your pension. The plan calculates your monthly payment using a formula that typically multiplies your years of service by a percentage of your average salary in your final years of work.

For example, a police officer with 25 years of service might receive 50 percent of their average salary over the last three years, paid monthly for life. The amount does not change based on market performance. If you live to 95, you receive the same payment every month. If you die, your beneficiary may receive a reduced ongoing payment, depending on the plan rules you chose when you retired.

You do not manage the pension money or decide where it is invested. The pension fund's professional managers handle that. Your only choice is usually whether to take the full amount as a monthly payment or take a lump sum — a single large payment — instead. That choice is permanent and should be made carefully.

How a 401(k) account works

You open a 401(k) through your employer's plan administrator, usually during your first weeks of employment. You choose what percentage of each paycheck to contribute — typically 1 to 20 percent — and that money is deducted before income tax is calculated. Your employer may match a portion of what you contribute, usually up to 3 to 6 percent of your salary.

You then choose how to invest the money from a list of options the plan offers, usually mutual funds and target-date funds. Your balance grows or shrinks based on how those investments perform. You own the account and can see the balance anytime. You decide how much risk to take and can change your investment choices once or twice per year.

When you retire, you can withdraw money from the account as you need it. If you withdraw before age 59½, you typically pay a 10 percent penalty plus income tax on the amount withdrawn. At age 73, you must begin taking a minimum withdrawal each year, whether you need the money or not. The money you leave in the account can be passed to your heirs.

Vesting: when the money becomes yours

With a pension, you must work at the employer for a certain number of years before you earn the right to a pension payment. This is called vesting. The vesting schedule varies by employer and plan — some require 5 years, others 10 or more. Until you are vested, if you leave the job, you receive no pension. Once you are vested, you have earned a pension payment even if you leave the job immediately.

With a 401(k), your own contributions are always yours immediately — you are 100 percent vested in your own money from day one. Your employer's matching contributions may have a vesting schedule. For example, you might be 20 percent vested after one year, 40 percent after two years, and fully vested after five years. If you leave before you are fully vested in the employer match, you forfeit the unvested portion.

Tax treatment during retirement

Pension payments are taxed as ordinary income in the year you receive them. If you took a lump sum instead of monthly payments, the entire amount is taxable in that year, which can push you into a higher tax bracket. Some pensions allow you to roll a lump sum into an Individual Retirement Account (IRA) to spread the tax burden over time.

401(k) withdrawals are also taxed as ordinary income. However, you control the timing and amount of withdrawals, so you can manage your tax burden by taking smaller amounts in some years and larger amounts in others. If you withdraw before age 59½, you pay income tax plus a 10 percent early withdrawal penalty, with some exceptions for hardship or disability.

Portability: what happens when you change jobs

A pension is tied to the employer. If you leave the job before you are vested, you lose it entirely. If you leave after you are vested, you keep the pension you earned, but it is frozen at the salary and service level when you left. You do not earn additional pension credits at a new job. The monthly payment begins when you reach the plan's retirement age, which might be 55, 60, or 65 depending on the plan.

A 401(k) is portable. When you leave a job, you can roll the entire balance into a new employer's 401(k) plan or into an Individual Retirement Account (IRA) that you open yourself. The money continues to grow tax-deferred. You can have multiple 401(k)s from different employers, or you can consolidate them into one IRA. This flexibility is one reason 401(k)s are easier to manage across multiple jobs.

Employer contributions and matching

With a pension, the employer funds the entire plan. You do not contribute money from your paycheck — the employer's investment returns and contributions pay for your retirement benefit. This is why pensions are called defined benefit plans: the benefit is defined and may provide, and the employer bears the cost.

With a 401(k), you contribute your own money, and the employer may add a match. A typical match is 50 cents for every dollar you contribute, up to 6 percent of your salary. Some employers contribute a flat percentage regardless of what you contribute. Some contribute nothing. Because you bear the investment risk and the employer's contribution is optional and limited, 401(k)s are called defined contribution plans.

Frequently Asked Questions

Can I have both a pension and a 401(k) at the same time?

Not from the same employer. However, you can have a pension from one employer and a 401(k) from another. For example, you might work for a city government with a pension, then move to a private company with a 401(k). Both continue to grow independently.

What happens to my pension if the company goes out of business?

Private-sector pensions are insured by the Pension Benefit Guaranty Corporation (PBGC), a federal agency. If the plan fails, the PBGC pays your pension, though usually at a reduced amount if the plan was severely underfunded. Government pensions are not covered by the PBGC but are typically funded by tax revenue and are considered safer.

Can I take my pension as a lump sum instead of monthly payments?

Many plans offer this option, but not all. If your plan does, you must decide before you retire — the choice is permanent. A lump sum is taxed in full in the year you receive it, which can be a large tax bill. Consult a tax professional before choosing.

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

You lose the pension entirely. Any contributions the employer made on your behalf are forfeited. This is why checking your vesting schedule before leaving a job is important — sometimes waiting a year or two can mean the difference between no pension and a pension for life.

Can I roll a 401(k) into a pension plan?

No. A 401(k) can be rolled into an IRA or another 401(k), but not into a pension plan. Pension plans are closed to new contributions from outside sources. However, if you have both a pension and a 401(k), you manage them separately.