Governmental 457(b) plans are a familiar part of the benefits package at many public agencies. Employees can defer a portion of their compensation and into the plan for retirement, often as a supplement to a defined benefit pension. It is tempting to think of a governmental 457(b) plan as the public sector version of a 401(k).
That is a useful shorthand, but the comparison has its limits. Governmental 457(b) plans operate under Internal Revenue Code section 457 and are subject to rules that differ in important respects from those governing 401(k) plans and other retirement plans. Some of those differences create opportunities for employees, while others can create administrative problems when an agency, employee, or payroll department assumes the rules work the same way.
Here are five differences public agencies should keep in mind.
1. The Contribution Limit Stands on Its Own
The annual contribution limit is a good example of how familiar numbers can obscure different rules. For 2026, the basic contribution limit for a governmental 457(b) plan is $24,500, or 100 percent of the participant’s includible compensation if less. That happens to be the same dollar amount as the 2026 elective deferral limit applicable to 401(k) and 403(b) plans.
Despite the identical dollar limits, the 457(b) limit is generally separate from the limit that applies to 401(k) and 403(b) plans. An employee who contributes to a 403(b) plan, for example, may also contribute up to the applicable annual limit to a governmental 457(b) plan. Subject to the terms and limits of the respective plans, an employee with access to both may contribute up to the applicable annual limit to each. That can make a 457(b) particularly valuable for public employees seeking to increase their retirement savings.
The rule is different, however, for contributions made to the 457(b) plan itself. Employer contributions generally count toward the same annual 457(b) limit as the employee’s salary deferrals. For example, an agency that contributes $2,000 to an employee’s 457(b) account generally reduces by $2,000 the amount the employee may defer from compensation for that year.
2. Employees Approaching Retirement May Have Another Catch Up Option
The age based catch up rules changed significantly under the SECURE 2.0 Act, passed by Congress in December 2022 . Prior to the SECURE 2.0 Act, any participant age 50 or older was able to contribute an additional amount to their retirement, with the limit set at a uniform dollar amount for participants. In 2026, participants age 50 or older may be eligible to contribute an additional $8,000. Participants who attain ages 60, 61, 62 or 63 during the year may qualify for an even larger catch up contribution of $11,250.
A governmental 457(b) plan may also provide a different catch up opportunity under Internal Revenue Code section 457(b)(3). During the final three taxable years before reaching the plan’s normal retirement age, an eligible participant may be able to make additional contributions based on amounts the participants could have deferred, but did not defer, in prior years of participation. This is sometimes described as allowing an employee to contribute up to twice the normal annual limit. While that can be true, it is not an automatic doubling of the contribution limit. The amount available depends on the participant’s contribution history. Suppose an employee is two years from the plan’s normal retirement age and wants to maximize contributions before retiring. The employee contributed well below the applicable limit during several earlier years of participation. Depending on the plan terms and the employee’s contribution history, some of that unused capacity may now be available under the special catch up. By contrast, an employee who consistently contributed the maximum may have no unused capacity available for the special catch up.
The special rule also creates an administrative issue that requires more than determining the employee’s age. The employee cannot use the special three-year catch up and the age based catch up in the same year. If both are potentially available, the participant may contribute under the provision that permits the greater contribution. The IRS has specifically identified administration of this special catch up as an area in which 457(b) plan errors occur. For agencies that offer it, accurate historical contribution records matter.
3. Age 59½ Does Not Have the Same Significance
One of the more notable differences between a governmental 457(b) plan and a 401(k) plan appears when an employee takes a distribution.
Generally, a distribution from a governmental 457(b) plan is not subject to the 10 percent additional federal tax on early distributions that generally applies to distributions from other retirement plans before age 59½. For example, a public employee who separates from employment and takes an otherwise permissible 457(b) distribution before reaching age 59½ generally does not incur the additional tax solely because of age.
There is an important exception for amounts that were rolled into the 457(b) plan from certain other retirement plans or accounts. If a participant previously rolled assets from a qualified retirement plan, 403(b) plan, or IRA into the governmental 457(b) plan, distributions attributable to those rollover amounts may still be subject to the 10 percent additional tax.
Employees should also be careful when considering a rollover out of the 457(b) plan. Moving governmental 457(b) assets into an IRA or another retirement plan can affect how a later distribution is treated. If the assets are rolled into an IRA or an employer plan that is not a governmental 457(b) plan, a later distribution before age 59½ may be subject to the 10 percent additional tax unless an exception applies. An employee who expects to need access to retirement funds before age 59½ may therefore want to understand the potential tax consequences before completing a rollover.
4. “457(b)” Does Not Always Mean Governmental 457(b)
Public agencies occasionally encounter guidance that refers broadly to “457 plans.” That description can obscure an important distinction.
Section 457(b) plans may be maintained by state and local governments, but they may also be maintained by certain tax exempt organizations. Governmental and nongovernmental 457(b) plans are subject to important differences.
For governmental plans, Internal Revenue Code section 457(g) requires plan assets and income to be held in trust for the exclusive benefit of participants and their beneficiaries. The requirement may also be satisfied through qualifying custodial accounts or annuity contracts. By contrast, assets set aside to fund a nongovernmental 457(b) plan generally remain the property of the tax-exempt employer and are subject to the claims of the employer’s general creditors.
This distinction is especially important when researching plan questions or responding to employee inquiries. Internet searches for “457(b) distribution rules” or “457(b) rollover rules” can produce information about both governmental and nongovernmental plans. Agencies should confirm that the guidance they rely on actually addresses the type of plan they sponsor.
5. Outsourcing Administration Does Not Outsource Every Responsibility
A public agency may have an experienced deferred compensation provider administering its 457(b) plan. Employees may enroll through the provider, select investments on the provider’s website, request distributions from the provider, and call the provider when they have questions. From an employee’s perspective, the provider may appear to “run” the entire plan.
However, the agency remains involved in important aspects of plan administration. The agency still has to implement employee deferral elections through payroll and timely transmit contributions. Employment and compensation information may need to be provided to the recordkeeper. The agency and provider also need to understand who is responsible for determining eligibility for particular plan features, and the plan must ultimately operate in accordance with its written terms and Internal Revenue Code section 457.
Consider an employee using the special three year catch up. The recordkeeper may maintain the account, but calculating the employee’s permitted contribution can require historical information about prior eligibility and contributions. If the recordkeeper does not have accurate information, the contribution limit can be calculated incorrectly.
Contribution elections present another potential source of error. For example, an employee changes a contribution election, but the change is entered incorrectly and payroll contributions eventually exceed the employee’s applicable annual limit. The IRS updated its guidance concerning excess governmental 457(b) deferrals in July 2026. When a governmental 457(b) plan exceeds the applicable plan limitation, the excess deferral, together with allocable net income, must be distributed as soon as administratively practicable after the plan determines that there is an excess deferral.
These situations are good reasons for agencies to periodically examine how responsibility is divided among benefits personnel, payroll, and the plan provider. An agency should know who monitors contribution limits, who determines eligibility for special catch up contributions, what information the provider receives from payroll, and how the parties communicate when an error is identified.
A service agreement can assign administrative tasks. It cannot eliminate the need for accurate information, clear allocation of responsibilities, and effective coordination .
Know Which Rules Apply to Your Plan
These differences are not merely technical. Some can provide meaningful advantages to public employees. The separate 457(b) contribution limit may allow an employee participating in another type of retirement plan to save substantially more. The special three-year catch-up can help some employees increase savings as they approach retirement. And the different treatment of governmental 457(b) distributions under the 10 percent additional tax may be particularly important for employees who leave public service before age 59½.
At the same time, not every governmental 457(b) plan offers every feature permitted by federal law. The Internal Revenue Code establishes the framework, but the agency’s plan document determines which optional features are actually available. An agency should therefore review its own plan terms before advising an employee that a particular catch up, distribution option, Roth feature, or other provision is available.
Recent changes make that review particularly timely. SECURE 2.0 increased catch-up contributions for participants who attain ages 60 through 63 during the year. Beginning in 2026, participants whose prior year wages from the employer sponsoring the plan exceed the applicable threshold generally must make age based catch up contributions on a Roth basis. Those changes may require coordination among the agency, payroll, and the agency’s 457(b) provider.
Governmental 457(b) plans can look deceptively familiar. Understanding the rules that make them different from other retirement plans, and the administrative responsibilities those rules create, can help public agencies administer their plans more effectively and provide employees with more accurate information concerning an important part of their retirement benefits.






