IRS Clarifies Which Retirement Plan Amendments Can Wait Beyond 2026

On Sept. 16, 2026, the IRS said some retirement plan amendments tied to the SECURE Act and SECURE 2.0 do not necessarily have to be signed by the broad Dec. 31, 2026 deadline. The clarification matters for sponsors of 401(k) plans, pension plans and 403(b) plans that have been working toward year-end document updates and were unsure how that deadline interacts with the IRS Required Amendments List.

As summarized in a JD Supra write-up of the IRS article, the agency confirmed that some required amendments can be due later, based on when the IRS places a provision on an annual Required Amendments List. That means the operational rule may already be in effect, but the formal document deadline can slide beyond 2026 for certain items.

What Changed

Earlier guidance had already set a broad amendment deadline of Dec. 31, 2026 for required and discretionary SECURE and SECURE 2.0 amendments for non-governmental, non-collectively bargained plans, with governmental plans generally getting until Dec. 31, 2029. A separate July 2026 summary on JD Supra said collectively bargained plans generally have until Dec. 31, 2028.

The new IRS clarification addresses how that broad deadline works alongside Revenue Procedure 2022-40. Under that procedure, required amendments resulting from a change in qualification requirements are generally not due until the end of the second calendar year after the item appears on the IRS Required Amendments List.

The practical effect is that the broad 2026 deadline is not the last word for every required SECURE or SECURE 2.0 provision. If a required item shows up later on the Required Amendments List, the document deadline may move later as well.

Who Is Affected

The clarification is relevant to sponsors of single-employer qualified plans such as 401(k) plans and traditional defined benefit pension plans, as well as 403(b) plans. It is especially important for employers and plan committees that have adopted operational changes under SECURE or SECURE 2.0 but are still sorting out when formal amendments must be signed.

Plan sponsors juggling multiple changes may care most. The July JD Supra summary noted that the 2026 amendment cycle can include changes involving required minimum distribution ages, Roth catch-up contributions for high earners, higher catch-up limits for participants ages 60 to 63, a $7,000 cash-out limit for small balances, and long-term part-time employee eligibility rules.

For affluent households, this is mostly an administrative story rather than a direct tax-law change. Still, it can affect how quickly a workplace plan adds features or updates plan language around withdrawals, catch-up contributions and employee eligibility. Business owners who sponsor plans may also face legal and administrative costs if deadlines are misunderstood.

The After-Tax Math

The key distinction is between required amendments and discretionary amendments.

• Required amendments: may get extra time if the relevant provision appears later on the Required Amendments List.
• Discretionary amendments: generally remain due by Dec. 31, 2026 for SECURE and SECURE 2.0 provisions if that relief applies, even if the plan adopted the feature earlier.

Here is how the IRS said that plays out for several notable items:

Example: if an employer had assumed every SECURE 2.0 amendment needed to be signed by Dec. 31, 2026, the IRS clarification suggests that assumption may be too broad. A required provision that does not appear until the 2027 Required Amendments List could instead carry a Dec. 31, 2029 amendment deadline. By contrast, an optional feature the plan chose to offer, such as a discretionary Roth employer contribution provision, would not get that same extension merely because of the Required Amendments List.

What to Discuss With Advisors

For plan sponsors, the immediate issue is document inventory. Households that own businesses with retirement plans may want to confirm which SECURE and SECURE 2.0 changes were implemented operationally, which are mandatory, and which were optional plan design choices.

That distinction matters because the IRS said discretionary amendment deadlines are not extended by publication on the Required Amendments List. However, the agency also noted that later guidance on a discretionary feature may still require another amendment, and that later amendment could follow the Required Amendments List timing rule.

In practice, businesses in this situation often discuss three questions with ERISA counsel, third-party administrators or plan document providers:

1. Which amendments are required versus optional?
2. Which required items have already appeared on a Required Amendments List?
3. Whether any operational changes were made that still need formal plan language before year-end 2026.

For participants, especially high earners who use catch-up contributions, the clarification does not change contribution limits or tax rates by itself. But it may affect when plan documents catch up with rules that shape how those contributions are handled inside employer plans.

What to Watch Next

The IRS said it intends to issue further guidance as part of its 2026 Required Amendments List. The agency also signaled that additional SECURE and SECURE 2.0 provisions expected to land on a later list include automatic enrollment requirements for new plans and long-term part-time employee participation rules.

That means the amendment calendar is still moving. For sponsors and business owners, the main takeaway is that Dec. 31, 2026 remains a critical deadline, but not every required change shares the same date. The details now depend more heavily on whether a provision is required or discretionary and when, exactly, the IRS places it on the Required Amendments List.

After TAX is an independent publication. Articles are general information, not tax, legal or investment advice. Consult a licensed professional about your situation.