ERISA 204(h) Notice: Requirements, Timing, and Penalties

An ERISA Section 204(h) notice is the written warning a private-sector pension plan must give participants before an amendment significantly reduces the rate at which they will earn future benefits. The plan administrator has to deliver it before the amendment takes effect — generally at least 45 days before — so affected individuals can adjust their retirement planning. If the notice is late, incomplete, or never sent, the plan sponsor faces an excise tax of $100 per day for every person who should have received it, and in serious cases the amendment can be effectively undone.¹

What Triggers the Notice

The trigger is any plan amendment that provides for a “significant reduction in the rate of future benefit accrual.”² The reduction is prospective. It affects what participants will earn going forward, not what they have already banked. Typical examples:

Lowering the benefit multiplier, such as moving from 1.5% of final average pay per year of service to 1.0%.
Changing the definition of compensation used in the formula, for instance by excluding bonuses that used to count.
Reducing the employer contribution rate in a money purchase pension plan.
Freezing future accruals entirely, whether for the whole workforce or a subset.

Amendments required by law are exempt, as are changes that touch only ancillary benefits like disability or death coverage rather than the retirement benefit itself.

When a Reduction Counts as “Significant”

There is no bright-line percentage. The regulations use a facts-and-circumstances test based on “reasonable expectations” at the time the amendment is adopted or, if earlier, at its effective date.³ A change that looks modest on paper can still be significant if it lands heavily on employees close to retirement or fundamentally changes the character of the benefit.

Early Retirement Subsidies and Cash Balance Conversions

Cutting or eliminating an early retirement benefit or retirement-type subsidy is treated the same as reducing the accrual rate.³ So a sponsor that leaves the base formula alone but trims a subsidized early retirement window still owes the notice if the trim is significant.

Cash balance conversions are the classic case. When an employer converts a traditional defined benefit plan to a cash balance design, many participants hit a “wear-away” period during which they earn little or no additional benefit because their old accrued benefit exceeds their opening cash balance account. The notice has to explain how the new formula works and what happens during that transition. A vague description of the new formula that hides the freeze can make the notice deficient on its face.

Which Plans Are Covered — and Which Aren’t

The rule reaches what the regulations call an “applicable pension plan”: traditional defined benefit pension plans qualified under the Internal Revenue Code, and individual account plans subject to the funding standards of IRC Section 412, most commonly money purchase pension plans.⁴

Several arrangements sit outside the requirement:

Profit-sharing and stock bonus plans, including 401(k) plans, because they are individual account plans not subject to the Section 412 funding rules.
403(b) tax-sheltered annuity plans for public schools and certain nonprofits.
Governmental plans maintained by federal, state, or local government employers.
Church plans, unless the church has elected coverage under IRC Section 410(d).
SEPs and SIMPLE IRAs.

The practical line: if your employer cuts the match on a 401(k) profit-sharing plan or a 403(b), no 204(h) notice is owed. If your employer has a traditional pension or money purchase plan and amends the benefit formula downward, it is.

Who Has to Receive the Notice

Three groups are entitled to notice under the statute:²

Applicable individuals — every participant and any alternate payee under a qualified domestic relations order whose future accrual rate may reasonably be expected to be significantly reduced.
Employee organizations, meaning any union or other organization representing affected participants.
Contributing employers to a multiemployer plan.⁵

Former employees with deferred vested benefits generally do not need to receive the notice unless the amendment reduces their already-accrued benefit expectations. The rule targets people whose future benefit stream will change.

What the Notice Must Say

The notice has to be written in language a typical participant can understand. Actuarial jargon defeats the purpose. It needs to include a clear description of the amendment, the specific effective date, and enough information about the change’s impact on future benefits that participants can grasp the practical effect. Individualized calculations for each participant are not required, but examples or illustrations comparing the old and new formulas are.

The notice also has to say that the full text of the plan amendment is available on request and give contact information for someone who can answer questions. A material misstatement or omission about the nature or timing of the reduction can invalidate an otherwise timely notice. Leading with the reduction, rather than wrapping it in positive framing about unrelated plan improvements, is the safer approach.

Timing and Delivery

The general rule: the notice must reach participants at least 45 days before the amendment’s effective date.⁵ Two exceptions shorten the window to 15 days:

A narrower exception allows notice up to 30 days after the effective date when an amendment adopted in connection with a plan merger or asset transfer under IRC Section 414(l) reduces only an early retirement subsidy without touching the accrual rate. For retroactive amendments, the 45-day clock runs from the date the amendment is put into operational effect, not the date the board formally adopted it.⁴ Missing the deadline by a single day exposes the plan to penalties.

Acceptable delivery methods include first-class mail to the participant’s last known address and hand delivery at the worksite. Posting the notice on a bulletin board does not count.⁴ Electronic delivery is allowed if the plan administrator uses a system that meets 26 CFR 1.401(a)-21, or the DOL’s 2020 electronic disclosure safe harbor, under which participants must first receive a paper notification explaining how electronic delivery works and keep the right to opt back to paper at no charge.⁶

Penalties for Failing to Comply

The consequences come from two directions, and they stack.

The $100-Per-Day Excise Tax

The Internal Revenue Code imposes a tax of $100 per day for each person who should have received the notice but didn’t, running from the first day of noncompliance until the notice is delivered or the failure is otherwise corrected.¹ For a plan with 500 affected participants, that runs $50,000 a day.

Some relief exists. No tax applies during any period when the responsible party didn’t know about the failure and was exercising reasonable diligence. If the failure is discovered and corrected within 30 days, no tax applies as long as reasonable diligence was in place. For unintentional failures where reasonable diligence was used, the total excise tax is capped at $500,000 per taxable year. The IRS may also waive part or all of the tax when the failure resulted from reasonable cause rather than willful neglect.¹

Egregious Failures and Benefit Restoration

An egregious failure carries a far larger consequence: the amendment is effectively unwound for affected individuals. A failure is egregious if it was within the plan sponsor’s control and was either intentional or resulted in most of the affected individuals not receiving most of the information they were entitled to. Failing to send a corrective notice promptly after discovering a mistake also counts as intentional.⁴

When a failure is egregious, every affected individual is entitled to the greater of the benefit they would have received without the amendment or the benefit under the amended plan. The plan has to keep paying at the old, higher rate for those individuals. For large plans, that liability can dwarf the excise tax and persist for decades. It is where most sponsors face their real financial exposure.

Non-Egregious Failures

Even when a failure does not rise to the egregious level, the excise tax still applies, and affected participants can bring claims under ERISA Section 502 to enforce their rights. The egregious/non-egregious distinction matters mainly for whether the amendment itself gets undone.

1
Office of the Law Revision Counsel. 26 USC 4980F – Failure of Applicable Plans Reducing Benefit Accruals to Satisfy Notice Requirements
2
Office of the Law Revision Counsel. 29 USC 1054 – Benefit Accrual Requirements
3
Federal Register. Notice Requirements for Certain Pension Plan Amendments Significantly Reducing the Rate of Future Benefit Accrual
4
eCFR. 26 CFR 54.4980F-1 – Notice Requirements for Certain Pension Plan Amendments Significantly Reducing the Rate of Future Benefit Accrual
5
eCFR. 26 CFR 54.4980F-1 – Notice Requirements for Certain Pension Plan Amendments Significantly Reducing the Rate of Future Benefit Accrual
6
eCFR. 29 CFR 2520.104b-31 – Alternative Method for Disclosure Through Electronic Media