401(k) vs 403(b): Key Differences and How to Plan Around Them
If you have changed jobs between a private company and a hospital, university, school district, or nonprofit, you may have noticed that your retirement plan changed names. The 401k vs 403b question comes up often, and for good reason. The two plans share many features, but there are differences in who offers them, what you can invest in, and some of the rules for saving more.
This retirement plan comparison explains how each plan works, where they differ, and how either one fits into a broader wealth and tax plan.
Start Here: A Complimentary Wealth and Tax Review
Many people hold a mix of old and current workplace plans. Compound offers a complimentary, no-obligation wealth and tax review that may include:
Your current plan: 401(k), 403(b), 457(b), or a combination
Old accounts: plans from former employers that may be worth consolidating or repositioning
Contribution strategy: traditional versus Roth, and how much to save
Investment options: fund choices, annuity contracts, and fees
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What Is a 403(b) Plan?
A 403b plan is a retirement plan for employees of public schools, colleges and universities, hospitals, and many tax-exempt organizations, along with certain ministers. Like a 401(k), it allows employees to contribute part of their pay on a pre-tax or, if the plan allows, Roth basis. Earnings grow tax-deferred inside the account.
A 401(k), by comparison, is most commonly offered by private, for-profit employers. Both are defined contribution plans, which means your balance depends on contributions and investment performance rather than a promised benefit.
401 vs 403 b: What Is the Same?
People searching "401 vs 403 b" are often surprised by how similar the plans are:
Contribution limits: Both plans share the same annual elective deferral limit set by the IRS, and the limit generally applies across both if you participate in a 401(k) and a 403(b) in the same year.
Catch-up contributions: Workers age 50 and older can generally make additional catch-up contributions in either plan.
Tax treatment: Traditional contributions are pre-tax, and withdrawals are taxed as ordinary income. Qualified Roth withdrawals are generally tax-free.
Employer contributions: Either plan may include a match or other employer contributions, often subject to vesting.
Withdrawal rules: Early withdrawals before age 59½ are generally subject to income tax and may be subject to an additional tax unless an exception applies. Required minimum distributions generally apply to pre-tax balances.
Rollovers: Both can generally be rolled into an IRA or another eligible employer plan when you leave a job.
401k vs 403b: Key Differences
Who offers the plan
401(k) plans are typically offered by for-profit companies. 403(b) plans are limited to public education employers, certain tax-exempt organizations, and certain ministers.
Investment options
403(b) investments have traditionally been limited to annuity contracts and mutual funds. 401(k) plans can offer a wider range, such as collective investment trusts or company stock. Some 403(b) menus include annuity products with higher costs or surrender charges, so it is worth reviewing what you own and what it costs.
Additional catch-up opportunity
Some 403(b) plans offer an additional catch-up provision for employees with long service at certain qualifying organizations. Not every plan offers it, and the rules interact with the age 50 catch-up, so it is worth confirming with your plan administrator.
Regulatory oversight
Most 401(k) plans are subject to federal employee benefit law, known as ERISA, which brings fiduciary and disclosure requirements. Some 403(b) plans, such as those offered by public schools, governmental employers, and churches, may not be subject to ERISA. That can mean different disclosure practices, which makes it more important to understand fees and investment choices yourself.
Pairing with a 457(b)
Many public employers and some nonprofits also offer a 457(b) plan. Governmental 457(b) plans generally have their own separate contribution limit, which may allow some employees to save significantly more on a tax-advantaged basis by using both.
How to Plan Around Either Plan
Whether you have a 401(k), a 403(b), or both over your career, the planning questions are similar:
Are you contributing enough to receive the full employer contribution?
Traditional or Roth? The answer depends on your current and expected future tax rates.
What are you paying? High-cost annuity contracts or funds may reduce long-term growth.
How does this account fit with everything else? Your workplace plan should be invested as part of your overall allocation, not in isolation.
What happens when you leave? A rollover may simplify your accounts, but it is worth comparing fees, investment options, and creditor protection first.
To explore how hypothetical contributions may grow over time, try the Compound calculator. Results are hypothetical and for illustration only.
A Note for Physicians and Hospital Employees
Physicians and other medical professionals often have access to a 403(b), a 457(b), and sometimes a separate plan through a private practice. Coordinating those plans with high income, student debt, and practice ownership can be complex. Learn more about financial planning for doctors and tax planning for high-income physicians.
Connecting Retirement Plans to Your Wealth and Tax Strategy
Your workplace plan is one part of your financial picture. Compound brings wealth management and tax planning and preparation together so contribution, investment, and withdrawal decisions are reviewed with taxes in mind. For broader context, see retirement planning in Wisconsin.
Compound works with educators, health care professionals, nonprofit employees, and executives throughout Wisconsin, including Milwaukee, Madison, Green Bay, Appleton, Eau Claire, La Crosse, and Wausau, as well as surrounding areas.
Have a 403(b), a 401(k), or both? Request a complimentary wealth and tax review.
Frequently Asked Questions
What is the main difference in 401k vs 403b plans?
The biggest differences are who offers them and what you can invest in. 401(k)s are typically offered by for-profit companies, while 403(b)s are offered by schools, hospitals, and many tax-exempt organizations, and have traditionally been limited to mutual funds and annuity contracts.
Is a 403b plan better than a 401(k)?
Neither is better in general. The quality of a specific plan, including fees, investment choices, and employer contributions, usually matters more than the plan type.
Can I contribute to both a 401(k) and a 403(b)?
You can participate in both, but the employee elective deferral limit generally applies across both plans combined. A governmental 457(b) generally has a separate limit.
Can I roll a 403(b) into an IRA?
Generally, yes, after you leave the employer or meet other plan conditions. Compare fees, investment options, and any surrender charges before moving money.
Do 403(b) plans offer Roth contributions?
Many do, but not all. Check your plan documents or ask your plan administrator.
Compound is a registered investment adviser. Registration does not imply a certain level of skill or training. This article is for informational and educational purposes only and should not be construed as personalized investment, tax, or legal advice. Tax laws and retirement plan rules are complex and subject to change. Strategies discussed may not be suitable for everyone, and there is no guarantee that any strategy will achieve its objectives or reduce taxes. Calculator results are hypothetical, are not guarantees of future results, and do not reflect any actual investment. Investing involves risk, including possible loss of principal. Please consult your tax, legal, and financial professionals before acting on any information in this article. For more information, see Compound's Form ADV, available at adviserinfo.sec.gov.
About Compound Wealth
Tax planning often intersects with investment decisions, business ownership, retirement planning, and other financial considerations. Compound Wealth provides an integrated approach that combines tax planning, wealth management, accounting, and business transition services to help clients evaluate financial decisions from multiple perspectives as part of an ongoing planning process.
