401(k) vs. 403(b) vs. 457(b) in 2026: Contribution Rules, Tax Differences, and Which Plan Fits Your Job
A workplace retirement plan’s name can reveal a great deal about who may use it, how much can be contributed, and when the money can be withdrawn. In most cases, your employer type—not personal preference—determines whether you receive access to a 401(k), 403(b), or 457(b).
For 2026, the basic employee contribution limit is $24,500. However, that headline number does not tell the whole story. Some workers can contribute to both a 403(b) and a 457(b), potentially creating $49,000 of employee contribution space before catch-up contributions. Withdrawal rules, employer contributions, fees, investment menus, and tax options also differ.
This article provides general educational information, not individualized tax, legal, or investment advice. An employer can offer fewer features than federal law permits, so verify the rules in your Summary Plan Description and with your plan administrator.
401(k), 403(b), and 457(b): Who Can Use Each Plan?
401(k) plans
A 401(k) is the most common defined-contribution retirement plan among private-sector, for-profit employers. Employees generally contribute through payroll deductions, and employers may provide matching or nonelective contributions.
403(b) plans
A 403(b) is generally available through public schools, colleges, universities, churches, hospitals, and qualifying tax-exempt organizations. These plans can resemble 401(k)s, but their investment menus have traditionally centered on mutual funds and annuity contracts.
457(b) plans
A 457(b) deferred-compensation plan is commonly offered by state and local governments. Certain tax-exempt nonprofit employers can also establish nongovernmental 457(b) plans, although those plans have materially different asset-protection, eligibility, distribution, and rollover rules.
Some government and nonprofit employees receive access to both a 403(b) and a 457(b). This is especially important because the 457(b) limit is generally separate from the employee-deferral limit shared by 401(k) and 403(b) plans.
| Plan | Typical employer | Tax options | Typical investment menu |
|---|---|---|---|
| 401(k) | Private-sector, for-profit company | Traditional; Roth if offered | Selected mutual funds, collective trusts, target-date funds, and sometimes a brokerage window |
| 403(b) | Public school, university, hospital, church, or qualifying nonprofit | Traditional; Roth if offered | Mutual funds and annuity contracts |
| 457(b) | State or local government; certain nonprofits | Traditional; Roth may be available in governmental plans | Employer-selected funds or annuity-based options |
The actual menu may be broader or narrower than these examples. Review expense ratios, administrative charges, annuity costs, surrender provisions, and any employer match before choosing investments.
2026 Contribution Limits and Catch-Up Rules
The 2026 employee elective-deferral limit is $24,500. For a 401(k) or 403(b), this limit covers the combined total of traditional pre-tax and designated Roth contributions. Choosing Roth treatment does not create an additional limit.
Standard age-50 catch-up
An eligible participant who is age 50 or older by the end of 2026 may contribute an additional $8,000 if the plan permits catch-up contributions. That produces a potential employee total of $32,500.
The catch-up can apply to 401(k), 403(b), and governmental 457(b) plans. It generally does not apply to nongovernmental 457(b) plans.
Higher catch-up for ages 60 through 63
A participant who is age 60, 61, 62, or 63 at the end of 2026 may qualify for a higher catch-up of as much as $11,250, provided the employer’s plan allows it. When applicable, that can raise employee deferrals to $35,750: the $24,500 basic limit plus the $11,250 higher catch-up.
This higher amount replaces the standard $8,000 age-50 catch-up for the year; it is not added on top of it.
403(b) 15-year-service catch-up
A 403(b) may allow certain employees with at least 15 years of service with the same eligible employer to contribute up to another $3,000 per year. The lifetime maximum under this provision is $15,000, and the available amount can be reduced based on prior contributions and years of service.
This catch-up is calculation-intensive. Employees should not assume that completing 15 years of service automatically produces the full $3,000 allowance.
Special 457(b) catch-up
A 457(b) may permit a special catch-up during the three years immediately preceding the plan’s designated normal retirement age. The maximum can be as high as $49,000 in 2026—twice the basic $24,500 limit—but the actual allowance depends on eligible contribution space that the employee did not use in prior years.
A participant generally cannot use the special 457(b) catch-up and an age-based catch-up for the same plan in the same year. The plan administrator must determine which provision produces the permitted amount.
Catch-up rules should never be stacked automatically. Age, employer history, prior deferrals, compensation, plan type, and plan-specific provisions can all affect the calculation.
The Biggest Contribution Advantage: 457(b) Plus 401(k) or 403(b)
The employee-deferral limit for 401(k) and 403(b) plans is generally aggregated. If an employee contributes $15,000 to a 401(k) in 2026, that person ordinarily has only $9,500 of the shared $24,500 limit left for a 403(b), excluding an applicable catch-up.
A 457(b) generally has a separate limit. An eligible worker could therefore make the following contributions in 2026:
- $24,500 to a 401(k) or 403(b); and
- $24,500 to a 457(b);
- for a combined $49,000 before catch-up contributions.
For example, suppose a 52-year-old public university employee has both a 403(b) and a governmental 457(b). Ignoring catch-ups, the employee could direct $24,500 to each plan. This separate-limit structure can be valuable for a high earner, a late-career saver, or someone trying to build retirement assets rapidly.
There is an important employer-contribution distinction. In a 457(b), employer and employee contributions generally share the same $24,500 annual limit. If an employer contributes $4,500, the employee may have only $20,000 of regular contribution space remaining.
For 401(k) and 403(b) plans, the employee’s $24,500 elective-deferral limit sits within a larger combined employee-employer limit. That combined limit is generally the lesser of 100% of eligible compensation or $72,000 in 2026, excluding qualifying age-based catch-up contributions. Employer contributions therefore do not normally reduce the employee’s $24,500 elective-deferral allowance.
Tax Differences: Traditional, Roth, and Employer Contributions
Traditional contributions
Traditional contributions are generally deducted from payroll before federal income tax is calculated. They may reduce current taxable income, although they ordinarily remain subject to Social Security and Medicare taxes. Contributions and investment earnings are generally taxed as ordinary income when distributed.
For example, an employee earning $90,000 who makes a $10,000 traditional contribution could reduce income subject to federal income tax by approximately $10,000, before considering other payroll and tax adjustments.
Roth contributions
Designated Roth contributions are made after tax, so they do not reduce current taxable income. Qualified withdrawals are generally free from federal income tax when applicable holding-period and age or other qualifying-event requirements are satisfied.
Federal law may permit a Roth feature, but the employer’s plan must adopt it. Do not assume every 401(k), 403(b), or governmental 457(b) offers Roth contributions.
Employer contributions
Employer matching and nonelective contributions have traditionally been deposited into a pre-tax account, even when the employee selects Roth salary deferrals. Current law can permit certain plans to offer Roth treatment for vested employer contributions, but implementation is optional and plan-specific. Check how your employer actually handles its contributions.
Annual contribution taxation is also separate from required minimum distribution rules. Traditional workplace-plan balances are generally subject to required distributions under the applicable age rules. Designated Roth accounts in employer plans are no longer subject to lifetime required minimum distributions for the original owner, though beneficiaries may face distribution requirements.
If you participate in multiple plans or change jobs during 2026, compare year-to-date payroll records from every employer. A new employer’s payroll system may not know how much you contributed to a prior employer’s 401(k) or 403(b).
Withdrawals, Early Access, Investments, and Rollovers
401(k) and 403(b) access
401(k) and 403(b) elective deferrals generally cannot be distributed until an allowed event, such as reaching age 59½, separating from service, experiencing a qualifying hardship, becoming disabled, or dying. Other exceptions can apply, but a taxable early distribution may also trigger a 10% additional federal tax.
Governmental 457(b) access
Distributions from a governmental 457(b) generally avoid the 10% early-distribution penalty after the employee separates from service, regardless of age. Traditional distributions are still normally subject to ordinary income tax.
This can make a governmental 457(b) particularly useful for someone planning to leave public employment before age 59½. However, money rolled into the 457(b) from another type of plan may retain different penalty treatment.
Nongovernmental 457(b) risks
A nongovernmental 457(b) is not simply a governmental plan offered by a nonprofit. Assets generally remain the employer’s property and may be available to its general creditors. Distribution elections can be less flexible, participation may be limited to a select group of management or highly compensated employees, and rollovers are substantially restricted.
Investments and rollovers
401(k) plans often offer a diversified selection of funds, while 403(b) plans may rely more heavily on mutual funds and annuities. A plan label does not determine quality: a low-cost 403(b) can be more attractive than an expensive 401(k), and vice versa.
Governmental 457(b) balances can generally be rolled to eligible retirement accounts when legal and plan requirements are satisfied. Nongovernmental 457(b) balances generally cannot be rolled into an IRA, 401(k), 403(b), or governmental 457(b).
Before moving governmental 457(b) money to an IRA or another plan, consider the loss of its special early-access treatment. A rollover can make the destination account’s withdrawal rules apply to future distributions.
Which Plan Fits Your Job and Savings Goal?
Private-sector employee
Your primary option will usually be a 401(k). Start by contributing enough to receive the full employer match, then examine the vesting schedule, plan fees, and investment choices. A generous match can outweigh modest differences in fund expenses, but high recurring fees still deserve attention.
Teacher, hospital employee, or nonprofit worker
Review the 403(b)’s vendor list carefully. Compare mutual fund expense ratios, annuity charges, surrender periods, administrative fees, and available employer contributions. Long-tenured employees should ask whether the plan permits the 15-year-service catch-up and request a formal calculation.
Government employee with two plans
If you have both a 403(b) or 401(k) and a governmental 457(b), first identify where any employer match is offered. After capturing the full match, compare fees and investments while considering the 457(b)’s separate $24,500 limit and potentially more flexible post-separation withdrawals.
For example, an employee able to save $30,000 might contribute enough to a 403(b) to earn the full match, direct additional savings to a lower-cost 457(b), and then return to the 403(b) if more contribution space is needed.
Employee planning an early career change or retirement
A governmental 457(b) may deserve additional attention because distributions after separation generally avoid the 10% early-withdrawal penalty. Compare that benefit with each plan’s fees, employer match, and investment menu rather than choosing based on withdrawal flexibility alone.
High earner or late-career saver
Determine whether the standard age-50 catch-up, higher age-60-to-63 catch-up, 403(b) service catch-up, or special 457(b) catch-up applies. Ask the recordkeeper for a written calculation because the largest theoretical number is not necessarily the amount you are eligible to contribute.
What to Do Next
- Confirm eligibility. Identify every 401(k), 403(b), and 457(b) available through your employer.
- Read the Summary Plan Description. Check Roth availability, withdrawal events, catch-up provisions, loans, vesting, and rollover rules.
- Capture the full employer match. Review the matching formula and whether contributions must be made throughout the year.
- Compare total costs. Examine fund expenses, recordkeeping charges, annuity costs, advisory fees, and surrender provisions.
- Verify contribution limits. Give HR or the recordkeeper information about other workplace plans and request confirmation before using a catch-up provision.
The practical difference among a 401(k), 403(b), and 457(b) is not just the name. Your employer determines which plan is available, while federal rules and plan design determine how much you can contribute, how the money is taxed, and when it can be accessed. For workers offered both a 403(b) or 401(k) and a 457(b), the separate contribution limits can be the most valuable distinction of all.