A 401(k) and a 403(b) are both workplace retirement plans that let employees defer pay into individual accounts. A 403(b) is offered by public schools, colleges, and certain tax-exempt employers, while a 401(k) is often offered by for-profit employers. They can differ in investment menus, ERISA coverage, and catch-up options, and plan rules vary by employer.
For many households in Allentown, Bethlehem, and Easton, the plan on the benefits sheet depends on who signs the paycheck. University faculty and administrators and hospital and health system employees are often offered a 403(b), sometimes alongside another plan. This guide explains how the two plan types compare, what the IRS says about 2026 limits, and what to review if you work in higher education or healthcare. It is educational, and it does not recommend one plan over the other for any individual.
Why These Plans Exist
Until the 1980s, many employees could count on a defined-benefit pension, where the employer decided how to fund and invest for retirement payments. That changed as defined-contribution plans such as the 401(k) and the 403(b) became common. In a defined-contribution plan, you generally choose how much to contribute, within IRS limits, and which of the plan's investment options to use. Your eventual balance depends on those choices, your employer's contributions if any, and market results, which can be positive or negative.
A third plan type, the 457(b), is less common. Some public and nonprofit employers offer it in addition to a 403(b).
401(k) vs. 403(b): How They Compare
The table below summarizes general differences. Every plan is governed by its own plan document, so confirm the details with your employer's benefits office or plan administrator.
| Feature | 401(k) | 403(b) |
|---|---|---|
| Who may offer it | Most often for-profit employers | Public schools, colleges and universities, churches, and 501(c)(3) tax-exempt organizations, which can include hospitals |
| Typical investment menu | Often a menu chosen by the employer, which may include a broad range of fund types | Accounts are annuity contracts or custodial accounts invested in mutual funds, and the IRS notes that options are limited to those the employer chooses |
| ERISA coverage | Private-sector plans are generally covered by ERISA | Governmental plans, certain church plans, and plans that meet Department of Labor safe-harbor requirements are not subject to ERISA; other 403(b) plans may be |
| Catch-up provisions | Age 50 and older catch-up, and a higher catch-up for ages 60 through 63, if the plan allows | The same age-based catch-ups, plus a 15-year service catch-up for eligible employees, if the plan allows |
| Roth option and loans | Depends on the plan | Depends on the plan |
| Pairing with a 457(b) | Less common | Some public and nonprofit employers offer a 457(b) alongside the 403(b) |
Tax-deferred contributions can reduce current taxable income, and Roth contributions are taxed now with potentially different treatment later. Both approaches involve trade-offs, including plan fees, limited investment menus, and the possibility of taxes and penalties on early withdrawals. Investing involves risk, including the potential loss of principal.
2026 Contribution Limits
Searches for 403(b) contribution limits are common, so here is what the IRS publishes. These figures are from the IRS and were checked on October 8, 2026. The IRS adjusts them for cost of living, so they may change in future years.
| 2026 limit | Amount |
|---|---|
| Employee elective deferrals (401(k) and 403(b)) | $24,500 |
| Age 50 and older catch-up, if the plan allows | $8,000 |
| Ages 60, 61, 62, and 63 catch-up, if the plan allows (instead of $8,000) | $11,250 |
| Total annual additions (employee plus employer contributions) to a 403(b) account | Generally the lesser of $72,000 or 100% of includible compensation |
Sources: IRS, Retirement Topics: 403(b) Contribution Limits, Retirement Topics: Catch-Up Contributions, and IRS announcement of 2026 limits. Figures as of October 8, 2026.
A few rules shape how those limits apply in practice:
- Combined deferral limit. The IRS says elective deferrals to your 403(b) must be combined with deferrals to other plans you participate in, such as a 401(k) or SIMPLE IRA, and the total cannot exceed the annual deferral limit. This can matter if you have a 403(b) at one employer and a 401(k) through a second job or practice.
- The 15-year service catch-up. If the plan permits it, an employee with at least 15 years of service with the same eligible employer may be able to defer an additional amount. Under the IRS rules, this special catch-up is limited to the least of $3,000 a year, a $15,000 lifetime total (reduced by amounts used in prior years), or a formula based on years of service and prior deferrals. Only years with the same organization count, and the IRS lists hospitals and public school systems among the eligible employer types, so ask your plan administrator whether your employer qualifies.
- Roth catch-up requirement. Beginning in 2026, the IRS says that in plans with Roth features, participants whose prior-year wages with the plan sponsor exceeded $150,000 must make catch-up contributions on a Roth basis. Higher earners, including some physicians, may want to confirm how this applies to their plan.
- 457(b) plans. The IRS lists a separate $24,500 deferral limit for 457(b) plans in 2026, and catch-up rules differ by plan type. Whether you can use a 457(b) in addition to a 403(b) depends on whether your employer offers one and on its terms.
What This Means for University and Hospital Employees
If you work for a college, a university, or a health system in the Lehigh Valley, a 403(b) is often part of your benefits package, and some employers also offer a 457(b) or a 401(k). A plan comparison can be useful, but the more practical question is usually what your own plan allows. Consider asking your benefits office:
- Which plans am I eligible for? Confirm whether you have a 403(b), a 457(b), a 401(k), or more than one, and whether eligibility depends on job classification or hours.
- What does the investment menu include, and what do the investments cost? Review the fees disclosed by the plan, including administrative and investment costs, and whether accounts are annuity contracts, mutual-fund custodial accounts, or both.
- Does the plan offer Roth contributions, loans, and catch-ups? These features are optional, so plan documents control. Ask about the age-based and 15-year service catch-ups.
- How do employer contributions work? Ask whether there is a match or a base contribution, and whether vesting schedules apply.
- Is the plan subject to ERISA? Your plan's summary documents and disclosures can help show which protections and reporting rules apply.
- What happens if I change employers or retire? Options may include leaving funds in the plan, rolling over to another plan or IRA, or taking a distribution. Each has different rules, costs, and tax consequences. Our article on managing your retirement plan covers these decisions in more detail.
Faculty and administrators who spend many years at one institution, and physicians and hospital staff who may have both employer plans and other income sources, can find that retirement accounts need coordination with taxes, income planning, and benefits. Our retirement income planning article explains how workplace accounts may fit into a distribution plan.
Two related guides may help. Higher-education employees who also see a 401(a) on their benefits sheet can read our comparison of the 401(a) and 401(k). If you are thinking about leaving an employer in your mid-50s, our Rule of 55 guide explains how an early-access exception may apply to the plan at the employer you leave, and where it may not.
How Wealthcare of the Lehigh Valley Can Help
Wealthcare of the Lehigh Valley is a fee-only fiduciary that works with higher-education faculty and administrators, medical professionals, and other pre-retirees and retirees across Allentown, Bethlehem, Easton, and the broader Lehigh Valley. Our 401(k) and retirement plan management service looks at employer plans such as 403(b) and 401(k) accounts as part of a broader financial plan. Outcomes depend on your circumstances, plan rules, tax law, and market conditions.
If you would like to talk through your employer's plan options, you may schedule a consultation with our team.
Frequently Asked Questions
What is the difference between a 401(k) and a 403(b)?
Both let employees defer salary into individual retirement accounts. A 403(b) is offered by public schools, colleges, and certain tax-exempt organizations such as hospitals, while a 401(k) is most often offered by for-profit employers. They can differ in investment menus, ERISA coverage, and available catch-up provisions, and plan rules vary by employer.
What are the 403(b) contribution limits for 2026?
According to the IRS, the 2026 limit on employee elective deferrals is $24,500. Plans that allow it may permit an additional $8,000 catch-up at age 50 or older, or $11,250 for ages 60 through 63. Some plans also offer a 15-year service catch-up. Your plan's terms determine which options are available.
Can I contribute to both a 401(k) and a 403(b) in the same year?
It may be possible if you have access to both plans, but the IRS says elective deferrals to a 403(b) and a 401(k) count toward one combined annual deferral limit. A governmental or eligible tax-exempt 457(b) plan has its own deferral limit, if your employer offers one.
Can I have a 403(b) and a 457(b) at the same time?
If your employer offers both, it may be possible. The IRS lists a separate 2026 deferral limit of $24,500 for 457(b) plans, so those deferrals are generally tracked apart from your 403(b) limit. Whether you can use both depends on your employer's plans and their terms, so confirm with your benefits office.
Do hospital and university employees usually have a 403(b)?
Many do, because public colleges and certain tax-exempt hospitals and universities are eligible to sponsor 403(b) plans. Some employers offer a 401(k), a 457(b), or more than one plan. Your benefits office or plan documents can confirm which plans you are offered.
Is a 403(b) or a 401(k) better for me?
Neither is better for everyone, and you usually choose among the plans your employer offers rather than between plan types. Compare the plan's fees, investment menu, employer contributions, Roth availability, and distribution rules, and consider how the account fits your broader financial plan.
Written by Ayad Amary, CFP®, AIF®
Wealthcare of the Lehigh Valley
