401(k), 403(b), and 457 Plans

Start with the sponsor

The names 401(k), 403(b), and 457(b) refer to different provisions of federal tax law. A private business commonly sponsors a 401(k). A 403(b), also called a tax-sheltered annuity arrangement, may be offered by public educational organizations, certain churches, and eligible tax-exempt organizations. A 457(b) may be sponsored by a state or local government, or by a qualifying tax-exempt organization for a select group of management or highly compensated employees. A worker cannot choose among these types independently of the employer’s eligibility and adopted plan.

A public employee may have access to a governmental 457(b) and perhaps a 403(b), depending on the employer. A teacher at a public school may be eligible for both. A charity may offer a 403(b), while a tax-exempt hospital’s selected executives may have a nongovernmental 457(b). Similar names do not make the plans interchangeable. The sponsor is the first clue to plan eligibility and to the rules that follow.

Contribution limits can interact

For 2026, IRS guidance lists a basic elective-deferral limit of $24,500 for 401(k), 403(b), and governmental 457(b) plans, with catch-ups available to some participants under current law and plan terms. When a participant has both a 401(k) and a 403(b), elective deferrals generally share an aggregate limit. A governmental 457(b) generally has a separate limit. A tax-exempt employer’s 457(b) has different rules, so do not apply the governmental-plan treatment automatically.

The annual limit is not the only constraint. A 401(k) or 403(b) may have an annual-additions limit that includes employer contributions, subject to compensation and statutory rules. A 457(b) limit is structured differently. Catch-up provisions can depend on age, plan terms, years of service, and whether the participant qualifies for a special pre-retirement catch-up. The numbers change over time, so identify the tax year and confirm the current IRS guidance.

Suppose a 59-year-old employee defers $15,000 into a 401(k) and $12,000 into a 403(b). The employee should not compare each plan separately with the basic limit. Shared deferrals can mean that the combined $27,000 exceeds the general limit unless eligible catch-up rules cover the excess and the plans permit it. If the same employee also contributes to a governmental 457(b), that plan may have a separate deferral limit, subject to its own terms.

401(k): common private-employer structure

A 401(k) lets an eligible employee direct some compensation into an account, often before tax or as a designated Roth contribution if the plan offers that option. The employer may match or make other contributions. Investment options, automatic enrollment, loans, hardship distributions, and vesting depend on law and plan design. A 401(k) can be traditional, safe harbor, SIMPLE, or another arrangement, and the design affects testing, contribution, and notice rules.

Read the summary plan description and fee disclosures to learn the match formula, vesting schedule, investment menu, eligibility date, and distribution options. A match with a year-end true-up may reward a different contribution pattern than a match calculated each pay period. An employee who defers only late in the year could miss some match if the plan has no true-up. This is a plan-specific feature, not a universal 401(k) rule.

403(b): education, churches, and eligible nonprofits

A 403(b) is generally available through public schools, certain tax-exempt organizations, and churches. Contributions may be made to a custodial account or annuity contract, depending on the arrangement. Employees defer salary, and employers may also contribute. Rules for universal availability, investments, vendors, and special catch-ups can differ from 401(k) arrangements. A long-serving employee at a qualifying organization may have a 15-year service catch-up if statutory conditions and plan terms permit it.

The 15-year service catch-up is not a blanket extra contribution for every person with 15 years on the job. It is limited by a formula that considers prior catch-up deferrals and years of service, and applies only to specified employers and plans. If an employee can use both the service catch-up and age-50 catch-up, ordering rules matter. A calculator should ask about service history and prior deferrals rather than adding an automatic amount.

A 403(b) can also have a maximum annual-additions limit that includes employer and employee amounts, while elective deferrals are subject to a separate limit. A participant covered by multiple workplace arrangements should ask whether amounts are aggregated. The same household may have a 403(b), a 401(k) from outside work, and an IRA, each with different coordination rules. “I have three accounts” does not mean that every contribution limit multiplies by three.

Governmental 457(b): public employers

State and local governments can sponsor governmental 457(b) plans. Employees defer compensation, and plan assets generally are held in a trust for participants. The plan can provide a special catch-up during the final three taxable years before the normal retirement age specified by the plan, if statutory conditions are met. It may also permit age-based catch-ups. Which route applies and how much room remains depend on prior deferrals and plan terms.

A notable distribution distinction concerns the additional tax on early distributions. Amounts distributed from a governmental 457(b) generally are not subject to the same 10% additional tax that can apply to early distributions from many other employer plans. Amounts rolled into the governmental plan from other plan types may be treated differently. Ordinary income tax can still apply, and the plan’s distribution rules still control. The distinction does not make the account freely accessible at any time.

Governmental 457(b) plans may permit rollovers to or from other eligible retirement plans under applicable rules. The source of funds can affect whether special early-distribution treatment applies. Track transferred amounts and obtain plan guidance before a rollover or withdrawal. A participant who moves money from a 401(k) into a governmental 457(b) should understand that the transferred balance can have different tax consequences from original 457 deferrals.

Tax-exempt employer 457(b): deferred-compensation promise

A nongovernmental tax-exempt 457(b) is often an unfunded deferred-compensation promise for a select group of management or highly compensated employees. The assets generally remain subject to the employer’s creditors rather than being held in the same participant-trust structure as a governmental plan. These plans have restrictions on eligible participants, rollovers, loans, and distribution events. They are not simply a nonprofit version of a public employee’s 457 account.

A hospital executive with a tax-exempt 457(b) should consider employer credit risk in addition to investment risk. Even if a statement displays a notional account and investment choices, the arrangement can still be an unfunded promise. A governmental employee’s account, in contrast, is generally held in trust for participants. The employer category affects legal structure and the participant’s practical claim on assets.

An eligible 457(b) plan sponsored by a tax-exempt entity is distinct from a nonqualified 457(f) arrangement. If a 457(f) plan fails, taxation can occur when the substantial risk of forfeiture lapses under the applicable rules. The distinction is technical, but it matters when a question describes deferred compensation without specifying its statutory section. Identify the plan’s legal structure before applying tax or distribution assumptions.

A worked comparison

Imagine a public university employee can defer into a 403(b) and a governmental 457(b). The employee contributes $10,000 to each. If eligible and permitted by both plans, the deferrals may use separate basic limits, although the employee should still account for employer contributions and the particular plan’s catch-up provisions. If the employee also has a 401(k) from a second job, 401(k) and 403(b) elective deferrals generally share the relevant aggregate limit; the governmental 457(b) is analyzed separately.

Now change the employer: a nonprofit hospital offers a 403(b) to staff and a tax-exempt 457(b) to selected executives. An executive cannot assume that the 457(b) has the governmental plan’s trust structure or rollover rights. The executive should examine the plan document, distribution events, employer-credit exposure, and how deferred amounts are treated when employment ends. This may affect whether deferring extra compensation is worthwhile even if the stated investment return looks attractive.

Finally, consider a worker leaving a private employer at age 52 with a 401(k) and starting at a municipality with a governmental 457(b). A rollover may be permitted, but it could change early-distribution treatment for the rolled balance. The worker should compare the old plan’s fees and protections with the new plan’s rules and avoid moving funds solely because a single distribution feature appears favorable.

Compare the plans for a worker

When comparing job offers, look at employer match, vesting, investment fees, access, portability, and the quality of plan administration. A 457(b) may provide a separate deferral opportunity for a public employee. A 403(b) may include a service-based catch-up for an eligible long-tenured worker. A 401(k) may offer a broad investment menu or matching formula. No feature follows automatically from a plan label.

A hypothetical public employee could defer $24,500 into a 403(b) and another $24,500 into a governmental 457(b) for 2026 if eligible, permitted by the plans, and consistent with current limits. That example illustrates how separate basic deferral limits may operate; it is not a recommendation or a claim that all employers offer both plans. Cash flow, matching contributions, tax treatment, other savings, and liquidity needs should shape an actual decision.

A nonprofit executive offered a 403(b) and a nongovernmental 457(b) faces a different choice. The 403(b) is an individual account arrangement with its own rules. The 457(b) can expose deferred compensation to employer credit risk and restrict distributions. A large displayed balance does not necessarily mean segregated assets are available. The employee should weigh the deferral opportunity against the legal promise and employer risk.

A concise classification checklist

Ask who sponsors the arrangement and which statutory type it is. Identify whether deferrals are shared with another workplace plan or have a separate limit, and whether employer contributions create another limit. Then inspect catch-up eligibility, Roth availability, investment and distribution choices, rollover treatment, and plan terms. For a 457(b), decide whether the employer is governmental or tax-exempt before discussing access, credit risk, or rollovers.

If a question supplies a contribution amount, verify the year and the participant’s age. If it describes someone leaving employment, distinguish governmental from nongovernmental 457(b) before discussing rollover or withdrawal. If it asks which plan an organization can sponsor, start with employer eligibility. These steps prevent the common mistake of treating every salary-deferral account as a 401(k) under a different name.

A plan’s summary and annual notices are useful starting points, but payroll records are needed to verify deferrals. If an employee contributes to more than one workplace plan, compare year-to-date totals before the final paycheck. Employers may use different payroll schedules, and correcting an excess after year-end can involve deadlines and tax reporting.

When payroll has changed employers midyear, ask the former plan for a deferral total before setting the new election. That simple check helps prevent an avoidable limit error.