An ERISA plan amendment is a formal, written change to the governing document of an employee benefit plan, and it takes effect only after the sponsor drafts specific replacement language, secures written authorization from whoever holds amendment power under the plan, signs the document by the applicable deadline, and gives participants the right notice on the right schedule. For most non-governmental qualified retirement plans, the current deadline to adopt the amendments required by the SECURE Act, the CARES Act, and SECURE 2.0 is December 31, 2026. Governmental plans have until December 31, 2028.1Internal Revenue Service. IRS Notice 2024-02 – Miscellaneous Changes Under the SECURE 2.0 Act of 2022
When You Have to Amend, and When You Choose To
Amendments come in two flavors, and the difference controls your timeline.
Mandatory amendments follow changes in federal law. SECURE 2.0 alone introduced dozens of provisions touching required minimum distribution ages, emergency withdrawal exceptions, and penalty-free distributions for domestic abuse survivors, among others.2United States Senate Committee on Health, Education, Labor, and Pensions. SECURE 2.0 Act Section-by-Section The plan has to operate under the new rules from their effective dates even when the paper amendment comes later, and the IRS gives sponsors a grace period called the remedial amendment period to get the document caught up. Under Section 401(b) of the Internal Revenue Code, a plan with a disqualifying provision is still treated as meeting qualification requirements if the sponsor adopts a corrective amendment by the end of that period.3Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans The statutory baseline is the employer’s tax filing deadline with extensions for the year the plan or amendment was adopted, but the IRS routinely extends these deadlines through published guidance, sometimes by years. The consolidated deadline for SECURE, CARES, and SECURE 2.0 amendments sits at the end of 2026 for most private plans.
Discretionary amendments are the ones the employer chooses to make: raising a 401(k) match, shortening a vesting schedule, expanding eligibility to part-time workers, or changing the compensation definition used to calculate benefits. Voluntary or not, they carry the same drafting, authorization, and disclosure requirements as amendments Congress forces. A sloppy discretionary amendment can create compliance problems as fast as a missed mandatory one.
What You Cannot Cut: The Anti-Cutback Rule
Under ERISA Section 204(g), a plan amendment cannot decrease a participant’s accrued benefit. The protection also extends to early retirement benefits, retirement-type subsidies, and optional forms of benefit participants have already earned.4Office of the Law Revision Counsel. 29 USC 1054 – Benefit Accrual Requirements You can change how future benefits accrue. You generally cannot touch what participants have already built up.
Violations are hard to unwind. If a plan adopts an amendment that impermissibly cuts accrued benefits, the amendment is typically void as to those benefits and the plan has to keep honoring the prior terms. Regulations do carve out several exceptions:
- Changes to the rate of future accrual, so long as already-earned benefits stay intact.
- Amendments needed to satisfy new qualification requirements, which can reduce protected benefits where necessary.
- Involuntary cash-out provisions for small account balances as permitted under the Code.
- Modifications or elimination of loan programs and changes to hardship distribution standards.
- Elimination of an optional form of benefit in a defined contribution plan, provided participants keep the right to a single-sum distribution that is otherwise identical.
The full regulatory list is longer and fact-specific.5eCFR. 26 CFR 1.411(d)-4 – Section 411(d)(6) Protected Benefits Any amendment that comes close to reducing an existing benefit deserves legal review before adoption.
Drafting and Authorizing the Amendment
Before drafting, pull together the plan’s exact legal name and the employer’s nine-digit EIN, both of which appear on every IRS filing. Pick a specific effective date, since that determines when the new rules start applying to participants. If the change reaches backward, confirm retroactive application is permitted under the Code and identify how far back it goes.
Then work against the current plan document. Every amendment should reference by section number the exact provisions it replaces or modifies. Template language from a third-party administrator or the IRS can help, but any template still needs to be reconciled with the specific document it will sit inside. Mismatches between what an amendment says and what the plan actually does are the most common source of operational errors.
A drafted amendment does nothing until the party with amendment authority formally approves it. For corporations, that usually means a board resolution or a unanimous written consent that references the specific provision granting amendment power, identifies the amendment being adopted, and states the effective date. Vague delegation language causes problems here. A resolution authorizing someone to “handle plan administration matters” or “sign necessary documents” may not be specific enough to support a substantive amendment.6Pension Benefit Guaranty Corporation. Model Plan Amendment for Special Financial Assistance The resolution should say plainly that the board is authorizing the amendment of the plan document itself, and any delegation to fewer than all board members or trustees needs to be documented.
Once authorized, the designated officers sign and date the amendment. Wet or electronic signatures both work, subject to the plan’s own terms and applicable state law. Store the signed original with the primary plan document. A sponsor should be able to produce, on short notice, a complete current plan document that incorporates every amendment in order. An incomplete document trail is one of the first things DOL investigators flag during an audit.7U.S. Department of Labor. Reporting and Disclosure Guide for Employee Benefit Plans
When You Have to File with the IRS
Most routine amendments do not require any IRS filing. The main exception involves plan mergers, consolidations, spinoffs, and transfers of assets or liabilities to another plan. Those transactions require Form 5310-A, filed at least 30 days before the transaction takes place.8Internal Revenue Service. Instructions for Form 5310-A Filing late does not automatically block the transaction, but it creates a compliance deficiency the IRS may scrutinize.
Notifying Participants
Adopting the amendment is only half the job. ERISA imposes two distinct notice requirements that apply in different situations, and mixing them up is a common mistake.
Summary of Material Modifications
The Summary of Material Modifications is the standard vehicle for describing an amendment to participants. It has to explain what changed in language an average participant can understand, and the plan administrator must distribute it no later than 210 days after the end of the plan year in which the amendment was adopted.9eCFR. 29 CFR 2520.104b-3 – Summary of Material Modifications to the Plan Distributing an updated Summary Plan Description that incorporates the changes satisfies the requirement.7U.S. Department of Labor. Reporting and Disclosure Guide for Employee Benefit Plans
One rule gets misapplied often: the shortened 60-day notice window for material reductions in covered services or benefits applies only to group health plans, not retirement plans. If you are amending a 401(k) or defined benefit plan, the 210-day SMM standard applies regardless of whether benefits are being reduced. The separate notice that applies to retirement plan benefit cuts is the Section 204(h) notice.
Section 204(h) Notice for Benefit Reductions
When an amendment to a pension plan significantly reduces the rate of future benefit accrual, or eliminates an early retirement benefit or retirement-type subsidy, ERISA Section 204(h) requires a separate notice at least 45 days before the amendment’s effective date. Small plans (fewer than 100 participants with accrued benefits) get 15 days, and the same 15-day period applies to multiemployer plans and to amendments adopted in connection with business acquisitions.10eCFR. 26 CFR 54.4980F-1 – Notice Requirements for Certain Pension Plan Amendments Significantly Reducing the Rate of Future Benefit Accrual
The 204(h) notice does not replace the SMM. They serve different purposes and run on different clocks. An amendment that significantly reduces future accruals triggers both: the 204(h) notice before the effective date, and the SMM within 210 days after the end of the plan year. Missing the 204(h) notice can render the amendment ineffective as to the reduction period until proper notice is given.
Penalties for Late or Missing Notice
If a participant requests plan information and the administrator fails to provide it within 30 days, a court can impose a penalty of up to $100 per day for each day the response is late.11Office of the Law Revision Counsel. 29 USC 1132 – Civil Enforcement Penalties run per participant, so a plan with hundreds of participants and a systemic disclosure failure can accumulate real liability quickly. The DOL can also pursue separate enforcement actions for patterns of noncompliance.
Delivering Notices Electronically
The Department of Labor maintains two safe harbors that let plan administrators deliver required disclosures, including the SMM, electronically instead of on paper. Options include a notice-and-access model, where participants are told where to find the document online, and direct email delivery.12U.S. Department of Labor. U.S. Department of Labor Announces Rule to Better Deliver Retirement Plan Information Options, While Saving Billions of Dollars for Plans
Electronic delivery does not cover everyone. Participants who do not have regular computer access at work, or who opt out, must receive a physical copy by mail or in person. Document the date and method of every delivery either way. If a participant later disputes receipt, the burden is on the plan administrator to prove it.
Fixing a Missed or Late Amendment
If you discover a required amendment was never adopted, or was adopted too late, the IRS Employee Plans Compliance Resolution System provides a path to fix the problem without losing the plan’s tax-qualified status. The available method depends on the type of failure.
Plan document failures, including late or missing amendments, are not eligible for the Self-Correction Program. The IRS is explicit: if the plan document is not up to date with current tax law, the sponsor has to use the Voluntary Correction Program instead.13Internal Revenue Service. Retirement Plan Errors Eligible for Self-Correction Self-Correction is reserved for operational errors, where the document was correct but the plan was administered incorrectly. Only three narrow categories of operational failures can be corrected through a retroactive plan amendment under Self-Correction: certain compensation limit mistakes, hardship distribution errors, and early inclusion of otherwise eligible employees.14Internal Revenue Service. Fixing Common Plan Mistakes – Using a Plan Amendment for Correction in the Self-Correction Program
The Voluntary Correction Program requires a formal submission to the IRS with a user fee tied to the plan’s net assets, ranging from $2,000 for plans with $500,000 or less in assets up to $4,000 for plans over $10 million. Asset values come from the most recently filed Form 5500, and fees are paid through Pay.gov as part of the submission.15Internal Revenue Service. Voluntary Correction Program (VCP) Fees These fees are not small, but they are far cheaper than the alternative. A document failure caught by the IRS during an audit, rather than self-reported, limits the correction options available and can lead to significantly worse outcomes, up to and including plan disqualification. The cheapest amendment is the one you adopt on time.