457(b) Plans and Why They Stack

The 457(b) is the only deferred-compensation plan in the Internal Revenue Code that does not share its contribution limit with the 401(k) or 403(b). For state and local government employees whose employers offer both, the stacking opportunity is one of the most powerful pre-tax savings tools the tax code provides.

What a 457(b) is

IRC §457(b) governs "eligible deferred compensation plans" offered by:

• Governmental employers — states, political subdivisions, agencies. These are the most common and the most participant-friendly.
• Tax-exempt §501(c) organizations (other than churches). These are "top-hat" plans available only to a select group of management or highly compensated employees, and the assets remain subject to employer creditors under IRC §457(b)(6).

The 2025 limits

• Employee deferral: $23,500
• Age-50 catch-up (governmental plans only): +$7,500
• SECURE 2.0 super catch-up, ages 60–63 (governmental plans only): +$11,250 instead of $7,500
• Three-year special catch-up (available in the three years preceding the plan's normal retirement age, under §457(b)(3)): the lesser of twice the annual limit ($47,000) or the annual limit plus unused deferral capacity from prior years

Why it stacks

The §402(g) elective deferral limit ($23,500 in 2025) coordinates deferrals across 401(k), 403(b), SIMPLE IRA, and Solo 401(k). The 457(b) deferral limit is set independently in §457(e)(15) and does not count toward the §402(g) ceiling. A public-school teacher whose district offers both a 403(b) and a 457(b) can defer $23,500 to each — $47,000 of pre-tax savings, plus age-50 catch-ups in both.

Pre-59½ access — the standout feature

Distributions from a governmental 457(b) are not subject to the 10% early-withdrawal penalty under IRC §72(t). Separation from service at any age permits penalty-free withdrawal. (Rollovers from a 457(b) to an IRA forfeit this benefit — once in the IRA the §72(t) penalty applies.)

For a 55-year-old government employee planning to retire early, the 457(b) is the ideal bridge account: it can fund the pre-59½ years without SEPP or Roth-ladder logistics.

The tax-exempt 457(b) gotcha

For tax-exempt §501(c) employers, the 457(b) is a true "top-hat" plan: the deferred amounts remain subject to the general creditors of the employer until distributed. If the charity fails, you become an unsecured creditor for your deferral. This risk does not exist for governmental 457(b)s, where assets must be held in trust under §457(g) and protected from employer creditors.

Common mistakes

• Treating it as a second 401(k) for limit purposes. Rolling the 457(b) into a 401(k) at retirement loses the §72(t) penalty exemption permanently.
• Missing the three-year special catch-up. Available only in the three years preceding the plan's normal retirement age, and only if you have unused deferral capacity from prior years. Most participants never use it.
• Concentrating in the tax-exempt 457(b). For nonprofit executives, the credit risk is real. Diversify between the 403(b) (qualified plan, protected) and the 457(b) (unsecured).
• Forgetting that catch-ups don't stack. You cannot use both the age-50 catch-up and the three-year special catch-up in the same year — pick the larger one.

Sources

• Internal Revenue Code §457, deferred compensation (Cornell LII): law.cornell.edu/uscode/text/26/457
• Internal Revenue Code §457(g), trust requirement for governmental plans: law.cornell.edu/uscode/text/26/457
• IRS Publication 4484, "Choose a Retirement Plan for Employees of Tax Exempt and Government Entities": irs.gov/pub/irs-pdf/p4484.pdf
• Treasury Regulation §1.457-2 through §1.457-12: law.cornell.edu/cfr/text/26/1.457-2
• IRS, "Comparison Chart: 401(k), Roth 401(k), 403(b), 457(b)": irs.gov/retirement-plans/roth-comparison-chart

RetirementCheck101 treats 457(b) as a separate limit and surfaces the stacking opportunity automatically. Explore the free educational tool.