How a 403(b) is different from a 401(k) retirement plan

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By Tara Mastroeni

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Tara Mastroeni

Writer, Fox Money

Tara Mastroeni has over a decade of experience covering personal finance and is a real estate and mortgage expert. Tara's byline has been featured by Forbes, The Balance, Business Insider, and Yahoo News.

Updated October 16, 2024, 2:50 AM EDT

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There are many different retirement plans on the market, but as an employee, you’re most likely to be offered one of the two qualified tax-advantaged plans offered by employers, a 401(k) or a 403(b).

For the most part, these plans function very similarly. For example, they have the same tax rate for early distributions and the same beneficiary rules. However, there are a few key differences between them. With that in mind, below is a look at how a 403(b) plan is different from a 401(k).

Differences between a 401(k) vs. 403(b) plan

Eligibility

While 401(k) plans are offered by for-profit companies, 403(b) plans are offered by tax-exempt organizations like schools, ministries, non-profits, and hospitals.

Regulation

By and large, 403(b) plans tend to be subject to less regulatory oversight than 401(k) plans. 401(k) plans are subject to the regulations outlined in the Employee Retirement Income Security Act (ERISA) and overseen by the U.S. Labor Department.

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403(b) plans are mostly exempt from these regulations, provided that the employer does not make contributions to employee 403(b) accounts. If that happens, the accounts begin to be considered “employer-sponsored” and then become subject to the same ERISA guidelines and reporting requirements as 401(k) plans.

Investment options

In general, 401(k) plans offer more investment options than 403(b) plans. It’s not uncommon to see 401(k) plans that offer a selection of stocks, mutual funds, exchange-traded funds (ETFs), and money market funds. With the passage of the Setting Every Community Up for Retirement Enhancement (SECURE) Act in 2019, employees have also begun to see more annuities being offered as part of their plans.

For their part, 403(b) plans are made up mostly of mutual funds, as well as fixed and variable annuities.

Contribution limits

In 2020, both plans offered the same basic annual contribution limit of $19,500, as well as a catch-up option that offers anyone over the age of 50 the opportunity to make an additional contribution of $6,500 per year.

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403(b) plans also offer a second type of catch-up contribution. They allow anyone who has worked for their employer for over 15 years to contribute an additional $3,000 per year, up to a lifetime maximum of $15,000.

Employer match

Most companies that offer 401(k)s offer an employer-match incentive. Usually, this is done by matching your contributions up to a certain percentage of your income. While employers who offer 403(b) plans have the option to do an employer-match incentive, most do not. If they did, they would be subject to the additional regulation mentioned above.

Cost

403(b) plans tend to have lower administrative costs than 401(k)s, but since 403(b) plans tend to rely more on higher-cost investments, their fees tend to be higher.

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Can I have both a 401(k) and a 403(b)?

Though it’s rare to see, some employers may offer both a 401(k) and 403(b) option. Alternatively, if you have two jobs, you may be given one option from each employer. In either case, it is possible to contribute to both accounts in order to maximize your retirement savings.

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That said, according to the IRS, no matter how many accounts you have, the limit on how much you can contribute is the same in total for the year. In 2020, that limit is $19,500. If you're over 50, that limit rises to $26,000. However, if you’ve worked with your 403(b) employer for 15 years, you are allowed to invest the extra $3,000 in that account.

Which is better for retirement: 401(k) or 403(b)

Ultimately, depending on which type of plan your employer offers, you may not have a choice between the two. If you do, it’s important to look at the investment options that are available to you, as well as any incentives like an employer match, and any costs and fees before making your final decision. It’s only by looking at the full picture of what each plan has to offer that you’ll be able to decide which one is a better fit for you.

Meet the contributor:
Tara Mastroeni
Tara Mastroeni

Tara Mastroeni has over a decade of experience covering personal finance and is a real estate and mortgage expert. Tara's byline has been featured by Forbes, The Balance, Business Insider, and Yahoo News.

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Fox Money is a property of Credible Operations, Inc., which is majority-owned indirectly by Fox Corporation. This material may not be published, broadcast, rewritten, or redistributed. All rights reserved. Use of this website (including any and all parts and components) constitutes your acceptance of Fox's Terms of Use and Updated Privacy Policy | Your Privacy Choices.