Planning for retirement is one of the most important steps you can take to secure your financial future. Employer-sponsored plans like 401(k)s and 403(b)s are two of the most common ways Americans build retirement savings. While they share many similarities, there are important distinctions that can impact your long-term strategy. At District Capital, we help professionals evaluate whether a 401(k), a 403(b), or a combination of both fits best within their comprehensive retirement plan.
In this guide, we’ll explain the features, benefits, and limitations of each plan so you can make informed decisions about your retirement savings.
What is a 401(k) plan?
A 401(k) is a retirement savings plan offered by for-profit employers. Employees can contribute a portion of their salary to the plan on a pre-tax or after-tax (Roth) basis, depending on the plan’s structure. Contributions grow tax-deferred, and taxes are paid when you withdraw funds in retirement. Many employers incentivize participation by offering a matching contribution, which is essentially free money added to your account.
Key Features of a 401(k):
- Broad investment options, such as mutual funds, ETFs, and company stock.
- Contribution limits set by the IRS, which increase for participants aged 50 and older.
- Penalty-free withdrawals allowed starting at age 59½, with required minimum distributions (RMDs) beginning at age 72.
What is a 403(b) plan?
A 403(b) is similar to a 401(k) but is specifically designed for employees of non-profit organizations, public schools, religious institutions, and certain government agencies. Like a 401(k), a 403(b) allows participants to contribute pre-tax or Roth dollars, with earnings growing tax-free until withdrawn.
Key Features of a 403(b):
- Often includes investment options such as annuities and mutual funds.
- Employers may or may not offer matching contributions.
- Includes special catch-up contributions for employees with 15 or more years of service with the same employer.
What are the similarities between 401(k) and 403(b) plans?
While these plans are designed for different types of employers, they have several similarities that make them powerful tools for retirement savings:
Tax Advantages
Both plans allow pre-tax contributions, reducing your taxable income in the year of contribution. Contributions grow tax-deferred, meaning you won’t pay taxes on earnings until you withdraw the funds. Roth options are also available, offering tax-free withdrawals in retirement if certain conditions are met.
Contribution Limits
For 2025, the contribution limits are:
- $23,500 for participants under age 50.
- $31,000 for participants aged 50 and older.
- $34,750 for participants aged 60-63 under special catch-up provisions.
Withdrawal Rules
Both plans allow penalty-free withdrawals starting at age 59½. Early withdrawals may incur a 10% penalty plus income taxes, although exceptions apply. RMDs are required starting at age 72, except for Roth accounts.
How are 401(k) and 403(b) plans different?
Despite their similarities, there are critical differences between 401(k) and 403(b) plans that can influence which one is better suited to your needs.
Employer Type
- 401(k): Offered by for-profit companies. Solo 401(k) plans are available for self-employed individuals and small business owners.
- 403(b): Offered by non-profit organizations, public schools, religious institutions, and some government entities.
Investment Options
- 401(k): Offers a wide range of investment options, including mutual funds, ETFs, and sometimes company stock.
- 403(b): Typically limited to annuities and mutual funds, although some plans are expanding their investment options.
Catch-Up Contributions
Both plans allow catch-up contributions for participants aged 50 and older. However, 403(b) plans have an additional provision for employees with 15 or more years of service with the same employer. This allows an extra $3,000 per year, up to $15,000 lifetime, under specific conditions.
Fees
- 401(k): Fees vary but are generally lower due to broader participation and competition among plan providers.
- 403(b): Fees are often higher, especially when annuities are involved. It’s essential to understand the fee structure of your plan.
Employer Match
While both plans allow for employer matching, it’s less common in 403(b) plans, as offering a match often requires compliance with the Employee Retirement Income Security Act (ERISA), which can be burdensome for some non-profits.
Comparison of 401(k) vs 403(b)
| 403(b) | 401(k) | |
| What is it? | An employer-sponsored retirement savings plan for non-profit entities | An employer-sponsored retirement savings plan for any business entity, including non-profits |
| Eligible employer | Educational organizations and nonprofit organizations under 501(c)(3) of the IRC | Any employer |
| Investment options | Annuities and mutual funds | Any investment available under the plan |
| Tax Treatment | Contributions are made either pre-tax and grow tax-deferred, or after-tax and grow tax-free | Contributions are made either pre-tax and grow tax-deferred, or after-tax and grow tax-free |
| Contributions Limits 2026 | Employees can contribute up to $24,500. Catch-ups: $8,000 (50+), $11,250 (ages 60–63). A “15-years of service” catch-up may allow +$3,000 for long-tenured employees (403(b) only). | Employees can contribute up to $24,500. Catch-ups: $8,000 (50+), $11,250 (ages 60–63). No 15-year special catch-up. |
| Contribution Limits 2025 | Employees can contribute up to $23,500 for 2025 (or $31,000 if aged 50 and older, or $34,750 if aged 60-63). An employee of a “qualified organization” with 15 years of service may be eligible to contribute an additional $3,000 per year. | Employees can contribute up to $23,500 for 2025 (or $31,000 if aged 50 and older, or $34,750 if aged 60-63). |
| Deductions and deferrals | Employer contributions are tax-deferred for employees. Employee contributions can be pre-tax or after-tax | Employer contributions are deductible to the employer. Employee contributions can be pre-tax or after-tax |
| Subject to ERISA? | Only if considered an ERISA employee benefit plan. Many nonprofits avoid employer contributions to maintain ERISA-exempt status. | Yes. 401(k)s are ERISA plans. |
| Form 5500 annual reporting | Not required for non-ERISA 403(b) plans; required if ERISA applies. | Required for all 401(k) plans. |
Can I have both a 403(b) and a 401(k)?
Yes, it’s possible to contribute to both plans if your employer offers both options. However, the combined contributions to both accounts cannot exceed the IRS annual contribution limit ($23,500 for 2025, or more with catch-up contributions). Having both plans can provide additional flexibility in your investment strategy.
Should I choose a 403(b) or a 401(k)?
The choice between a 401(k) and a 403(b) depends largely on your employer. For-profit companies offer 401(k)s, while non-profits and educational institutions typically provide 403(b)s.
If you have access to both, consider the following factors:
- Investment Options: Review the options available in each plan to see which aligns better with your goals.
- Employer Match: Compare the match offerings, as this can significantly boost your savings.
- Fees: Lower fees mean more of your money stays invested.
- Catch-Up Contributions: If you qualify for the additional 403(b) catch-up contributions, it may be advantageous.
Can I rollover a 403(b) to a 401(k)?
Yes, you can roll funds from a 403(b) to a 401(k) if you change employers and the new 401(k) plan accepts rollovers. A rollover allows you to consolidate your retirement savings and potentially access a broader range of investment options.
Start saving for retirement today!
Both 401(k) and 403(b) plans are excellent tools for retirement savings. The most important step is to start contributing to your employer-sponsored plan as early as possible. The combination of tax advantages, employer contributions, and compound growth can help you build a secure financial future.
If you’re unsure about your retirement strategy or want to explore how these plans fit into your overall financial goals, schedule a free discovery call with one of our financial advisors today. Let’s build a plan tailored to your future!
Frequently Asked Questions
1. Can I move money from a 401(k) to a 403(b)?
Yes. If you change jobs and your new employer offers a 403(b) plan that accepts rollovers, you can transfer funds from your old 401(k). Be sure to follow IRS rollover rules to avoid taxes or penalties.
2. Do 401(k) and 403(b) plans have different vesting schedules?
They can. Employers set their own vesting schedules, which determine how long you must stay with the organization before employer contributions fully belong to you. Always review your plan’s rules.
3. Which plan usually has more investment options—401(k) or 403(b)?
Generally, 401(k) plans offer a wider variety of investment options, including mutual funds, ETFs, and sometimes company stock. 403(b) plans often focus on annuities and mutual funds, though options have been expanding.
4. Are employer matches common in 403(b) plans?
Employer matches are less common in 403(b) plans than in 401(k)s, but they do exist. When offered, the terms may vary, so it’s important to understand your employer’s specific policy.
5. What happens to my 403(b) or 401(k) if I change employers?
You usually have several options: leave the money in your old plan, roll it into your new employer’s plan, move it to an IRA, or cash it out (though this may trigger taxes and penalties).
6. Can I contribute to both a Roth IRA and a 401(k) or 403(b)?
Yes. As long as you meet the income and contribution eligibility rules for each account, you can contribute to both a Roth IRA and an employer-sponsored plan in the same year.
Alvin Carlos, CFP®, CFA is a fee-only financial planner, in Washington, D.C. He has a Master’s degree in International Relations from SAIS-Johns Hopkins. Alvin is the founder of District Capital, a financial planning firm designed to help professionals in their 30s and 40s maximize their money and retire by 55, through holistic financial planning and research-driven investing. Schedule a free discovery call today.
