Updated August 3, 2026. Quick answer: the 457(b) exemption is strictly better in every respect that matters. The rule of 55 is a narrow exception that requires separating in or after the year you turn 55 and only covers that employer’s plan; the 457(b) exemption has no age condition at all and is structural rather than conditional. If you have both, spend the 457(b) first.
Two different kinds of rule
- The rule of 55 is an exception written into 72(t)(2)(A)(v) for a plan you separate from in or after the year you reach 55. The plan is still a qualified retirement plan; the statute just excuses this distribution. Miss the age condition and the 10% applies — and it does not travel to an IRA.
- The 457(b) exemption is not an exception at all. The 10% tax reaches only plan types listed in 4974(c), and a 457(b) is not listed. There is no age to hit and no condition to satisfy.
Where the difference bites
Separate at 52 and the rule of 55 gives you nothing — you were too young when you left, and that cannot be fixed later. A 457(b) does not care: after separation the money is available without the 10% tax at any age. For anyone whose career ends early, involuntarily, or on a disability retirement, that is the entire ballgame.
There is a third variant that beats both for one group of workers. Police, firefighters, paramedics and corrections officers get the same separation-from-service rule with a different number: age 50 or 25 years of service, whichever is earlier. ⚠️ Like the rule of 55, it attaches to the plan — and a rollover to an IRA destroys it.
What they share
Both live inside the plan and both die on rollover to an IRA. That is the single most expensive mistake available to a public-sector worker leaving in their fifties: the standard advice to consolidate everything into an IRA converts penalty-free money into penalty-exposed money, permanently, in exchange for tidiness.
If neither applies, the remaining route is a 72(t) series — which works, but locks you into fixed payments for five years or until 59½, and breaking it is expensive. Comparing the three in order: 457(b) first, rule of 55 second, 72(t) only if neither is available.
Related: rule of 55 vs 72(t) · the 457(b) mechanism in full.
Talk to a fiduciary advisorSponsored advisor-matching link. We may earn compensation if you submit the third-party form. Compare fees, scope, conflicts, credentials, and fiduciary duty before hiring.
Sponsored advisor-matching link. We may earn compensation if you submit the third-party form. Compare fees, scope, conflicts, credentials and fiduciary duty before hiring. Affiliate Disclosure.
Penalty and limit statements on this page are read from the Internal Revenue Code itself (26 U.S.C. 72, 402, 414, 457 and 4974) and from IRS Notice 2025-67 for the 2026 figures. General information, not tax advice; your plan document can be more restrictive than the Code, and it governs what your plan actually allows.