Home Mutual Funds 401(k) vs. Pension Plan: What’s the Difference?

401(k) vs. Pension Plan: What’s the Difference?

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A 401(k) and a pension are both employer-sponsored retirement plans. Both are methods for funding employees’ retirements, and both can benefit from contributions from the employer. So, how do these two retirement plans differ?

Key Takeaways

  • A 401(k) is a retirement plan to which employees can contribute; employers may also make matching contributions.
  • With a pension plan, employers fund and guarantee a specific retirement benefit for each employee and assume the risk of the financial obligation.
  • Once common, pensions in the private sector are rare and have been replaced by 401(k)s.
  • The shift to 401(k)s has placed the burden of saving and investing for retirement⁠—and the risk involved⁠—on employees.
  • A pension plan might be better suited for those wanting a fixed income for life, while a 401(k) plan might be better for those wanting greater control over their retirement funds.

401(k) vs. Pension Plan: An Overview

A 401(k) is classified as a defined contribution plan, and a pension is considered a defined benefit plan.

A defined-contribution plan allows employees and employers (if they choose) to contribute and invest funds to save for retirement, while a defined-benefit plan provides a specified payment amount in retirement. These crucial differences determine whether the employer or employee bears the investment risks.

In the U.K., these plans are called self-invested personal pension (SIPP) plans. A SIPP plan’s payout will depend on the overall performance of the chosen investments made with the contributed funds.

Pensions have become less common, and 401(k)s have had to pick up the slack despite having been designed originally as a supplement for traditional pensions rather than as a replacement. As of March 2022, 67% of United States private industry workers reported having access to defined contribution plans, while only 15% reported access to defined benefit plans.

This is in stark contrast to state and local government workers. As of March 2023, 86% of state and local government workers reported having access to defined benefit plans. Meanwhile, only 39% said they had access to defined contribution plans.

401(k) Plans

A 401(k) plan is primarily funded through employee contributions via pretax paycheck deductions. Contributed money can be placed into various investments—typically mutual funds, though stocks, bonds, other securities, and annuities may also be available. Any investment growth in a 401(k) occurs tax-deferred until you withdraw, and there is no cap on the growth of an individual account.

Many employers offer matching contributions with their 401(k) plans, meaning they contribute additional money to an employee account (up to a certain level) whenever the employee makes their own contributions. For example, assume your employer offers a 50% match of your individual contributions to your 401(k) up to 6% of your salary. You earn $100,000 and contribute $6,000 (6%) to your 401(k), so your employer contributes an additional $3,000.

Unlike pensions, 401(k)s place the investment and longevity risk on individual employees, requiring them to choose their own investments with no guaranteed minimum or maximum benefits. Employees assume the risk of both not investing well and outliving their savings.

401(k) Plans


  • Protection under federal law (ERISA from 1974). This protection does not protect against investment losses

  • Matching funds (matches may vary by employer, including some that do not match)

  • High annual contribution limit

  • Free investment advice (depending on your provider and company plan)

  • Loans on 401(k) balance in case of emergency

  • Tax benefits for pre-tax or post-tax contributions


  • Potentially limited investment options (depending on the plan provider)

  • Higher fees than other or self-managed investment accounts

  • Fees and penalties on early withdrawals

  • Payout lasts until the plan runs out of money

There’s a limit to how much you can contribute to a 401(k) each year. The contribution limit is $22,500 in 2023. Those aged 50 or older can also make a catch-up contribution, which is $7,500.

Pension Plans

Employees do not have control of investment decisions with a pension plan, and they do not assume the investment risk. Instead, contributions are made by the employer to an investment portfolio that is managed by an investment professional. In some cases, employees may also make contributions, which can be either required or voluntary.

The sponsor, in turn, promises to provide a certain monthly income to retired employees for life. This amount is usually determined by the number of years an employee has worked, a final average salary based on the last three to five years of the employee’s service, and a percentage multiplier, typically 2%. The pension must be vested, meaning that the employee is eligible to receive the full amount. Vesting can happen immediately or after a set number of years, often five to seven.

The guaranteed income comes with a caveat: If the company’s portfolio performs poorly or the company declares bankruptcy or faces other problems, benefits may be reduced. However, almost all private pensions are insured by the Pension Benefit Guaranty Corporation, with employers paying regular premiums, so employee pensions are often protected. Ultimately, pension plans present individual employees with significantly less market risk than 401(k) plans.

Pension Plans


  • Compound returns on earliest investments

  • Employer contributions up to a certain level (depending on employer)

  • Guaranteed income via annuity at retirement

  • A simplistic approach to investing as the benefit is defined

  • Easier to plan knowing what your retirement benefit (i.e. monthly payment) will be

  • Plan payout upon achieving retirement is for life


  • Inaccessibility until you’re closer to retirement

  • Lack of control over your account because it’s managed by your employer/pension provider

  • Risk of company bankruptcy resulting in reduced pension benefits

  • Employer retains control over the money until the employee retires

Though they are rare in the private sector, pension plans are still somewhat common in the public sector—for government jobs, in particular.

Pension vs. 401(k): Which Is Better?

Though there are pros and cons to both plans, pensions are generally considered better than 401(k)s because all the investment and management risk is on your employer, while you are guaranteed a set income for life. However, a 401(k) does offer some upsides.

A 401(k) can be more aggressively managed, and you control the growth, which can be greater than that of a pension fund, whose growth you don’t control. It can start earning money immediately, while a pension usually takes five to seven years before you are vested.

A 401(k) is also more portable; you can take it from one employer to another by rolling it over into a new 401(k) at your new job. You can also roll it over into an individual retirement account (IRA). A pension stays with the employer who provides it if you switch jobs. You must keep track of it, and when you are ready to retire, you have to apply for the pension before you can get your payments.

Can a Pension Plan Go Belly Up?

If it is not insured by the Pension Benefit Guaranty Corporation, it theoretically could if a company goes bankrupt. Fortunately, most private pensions are insured, so though payments might be reduced in the event of a financial calamity, the pensioner is protected.

Can I Take My Pension Early?

The answer is generally no. You must wait until the retirement age specified in the pension plan. However, some unscrupulous operators have come up with the idea of a “pension advance.” Future pensioners can use some or all of their as-yet-unreceived pension payments as collateral if they need some ready cash. The offers usually come attached to high fees and interest rates and the offer is illegal if you have a military pension.

Can I Get Early Payments From My 401(k)?

In most cases, if you make a withdrawal from your 401(k) before age 59½, you will have to pay a 10% early withdrawal fee (as well as pay taxes on the amount withdrawn). The Internal Revenue Service does have some exceptions to this rule listed on its website. They vary depending on the kind of retirement plan in question.

Is a Pension Better Than a 401(k) Plan?

A pension plan differs from a 401(k) plan, and different investors may be better suited for either option. A pension plan is usually better for investors who are interested in securing a fixed, stable income during their retirement. However, there is more risk involved regarding the pension plan as it is overseen by your company. Investors who want more control over their retirement plan without a guarantee of an income might prefer a 401(k).

Can I Have Both a Pension and 401(k)?

Yes, you can have both a pension plan and a 401(k) plan at the same time. It’s more likely to only have one active through your current employer, so it’s most often the case to have a pension plan you’ve vested for through a previous employer. In this situation, you can make contributions to your 401(k), and your pension plan benefits when you retire have already been established (ignoring any underlying changes to the plan).

The Bottom Line

Your employer is much more likely to offer a 401(k) than a pension in its benefits package. If you work for a company that still offers a pension plan, you have the advantage of a guarantee of a given amount of monthly income in retirement, with investment and longevity risk placed on the plan provider. If you work for a company that offers a 401(k), you’ll need to take on the responsibility of contributing and choosing investments on your own.

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