Catch-Up Contributions Rule: What Accounting Firms Must Know

Key Takeaways

• The Treasury Department's final regulations on catch-up contributions are effective November 17, 2025 (90 FR 44527; RIN 1545-BR11), following a September 16, 2025 Federal Register publication.

• The rule implements a SECURE 2.0 Act of 2022 requirement: catch-up contributions made by certain catch-up eligible participants must now be designated Roth contributions.

• The regulations are codified at 26 CFR Part 1 and affect participants in, beneficiaries of, employers maintaining, and administrators of retirement plans that permit age-50-plus catch-up contributions.

• Accounting firms that administer, advise on, or process payroll for client retirement plans should confirm plan documents and recordkeeping systems reflect the Roth designation requirement before the effective date.

• Some accounting firms already lean on automation platforms such as US Tech Automations to encode deadline logic like this once and monitor it across every client plan, rather than re-checking it manually each quarter.

What this rule actually does

The Treasury Department's final regulations on catch-up contributions were published in the Federal Register on September 16, 2025, at 90 FR 44527 (RIN 1545-BR11), and take effect November 17, 2025. Source: Federal Register / eCFR. The regulations are codified at 26 CFR Part 1.

In plain English, the rule provides guidance for retirement plans that permit participants who have attained age 50 to make additional elective deferrals — commonly called catch-up contributions. It does not create the catch-up contribution opportunity itself; that already exists in many employer-sponsored retirement plans. What changes is how certain catch-up dollars are taxed going in.

The regulations reflect statutory changes made by the SECURE 2.0 Act of 2022, including a requirement that catch-up contributions made by certain catch-up eligible participants must be designated Roth contributions — meaning those dollars are withheld after-tax rather than pre-tax, at the plan's payroll and recordkeeping level.

The rule text is the authoritative description of exactly which participants and plans the designation requirement reaches; this brief paraphrases it and should not be treated as a substitute for reading it directly alongside plan counsel. Because the requirement changes a tax-withholding mechanic rather than a contribution limit, the operational burden falls less on "how much can be contributed" and more on "how is it coded and withheld" — which is exactly the kind of plan-administration detail that runs through payroll systems, recordkeeper platforms, and the accounting firms that reconcile them.

That mechanical distinction is also why the rule reads as a single, narrow change rather than a broad rewrite of catch-up contribution eligibility. It does not touch who qualifies for catch-up contributions in the first place, and it does not restate contribution limits — both of those live elsewhere in the tax code and are outside the scope of 90 FR 44527. Accounting firms reviewing a client's plan should be careful not to read more into the rule than the designation requirement itself; the safest approach is to treat every other aspect of the plan's catch-up provisions as unchanged unless plan counsel says otherwise.

Who is affected

Per the rule abstract, the regulations affect participants in, beneficiaries of, employers maintaining, and administrators of certain retirement plans — specifically those that permit age-50-plus catch-up contributions under 90 FR 44527.

For accounting firms, that scope reaches further than it first appears. Firms that serve as a plan's recordkeeper or third-party administrator sit directly inside the compliance chain. So do firms that run payroll for plan-sponsor clients, since the Roth designation requirement has to be reflected in payroll withholding codes, not just in plan documents. And firms that provide benefits or retirement-plan advisory services — even without recordkeeping or payroll responsibilities — are typically the first call a client makes when a rule like this lands, simply because the client trusts their accountant to flag it.

It is worth being precise about what the rule does not say: it does not name every accounting firm as a regulated party. The direct obligations sit with plan sponsors (employers), administrators, and the plans themselves. An accounting firm's exposure comes from the services it provides to those sponsors and administrators, not from the regulation naming accounting firms directly. That distinction matters when a firm is scoping how much of this falls on internal compliance versus how much belongs to each client's own plan governance.

Firms that serve several plan sponsors at once face a compounding version of this same scope question: the Roth designation requirement has to be evaluated plan by plan, since plan design, payroll vendor, and participant population all vary by client. A firm that treats this as one blanket update across its entire book of business risks missing the plans where it does not yet apply, or — just as costly — missing the plans where it does.

What Accounting Firms should do before the date

• Inventory affected plans. Identify every client (or in-house) retirement plan that permits catch-up contributions, and flag which have participants who may be catch-up eligible under 90 FR 44527.

• Confirm Roth capability with each recordkeeper. Before November 17, 2025, verify that each plan's recordkeeper and payroll provider can process Roth-designated catch-up deferrals, not just pre-tax ones, and that the election flows through correctly end to end.

• Update plan documents and compliance calendars. Make sure any plan amendment language traces back to 26 CFR Part 1 and the September 16, 2025 Federal Register notice, and route the effective date into whatever calendar the firm uses to track client compliance deadlines.

• Loop in ERISA and tax counsel early. This brief explains what the rule does in plain English; it is not a substitute for plan counsel's review of specific amendment language or a specific client's plan design.

• Communicate to affected participants ahead of time. Payroll corrections after the fact are more disruptive to a client relationship than a heads-up before the effective date arrives.

• Confirm scope before acting. Not every plan or every catch-up-eligible participant is necessarily affected the same way; treat the designation requirement as narrow until plan counsel confirms otherwise for a specific plan.

Operationalizing Roth catch-up monitoring at volume

For a firm tracking this across a handful of client plans, a spreadsheet and a calendar reminder is enough. For a firm tracking it across dozens or hundreds of plans — with participants aging into catch-up eligibility on a rolling basis and recordkeepers that vary client to client — the harder problem is keeping the check current rather than understanding it once. US Tech Automations builds agentic workflows that can watch a firm's plan roster, flag participants approaching catch-up eligibility, and route a recordkeeping or payroll follow-up before a date like November 17, 2025 slips past, without replacing the ERISA counsel or actuary who signs off on the underlying determination. That kind of monitoring matters most in the months right after a rule like this publishes, when the gap between "we know about the requirement" and "every affected plan has actually been updated" is where compliance risk tends to hide. The agentic workflows platform is built around exactly that kind of ongoing, rule-anchored monitoring.

How this fits the broader regulatory window

This catch-up contributions brief is one entry in a point-in-time index of 259 U.S. federal rules published July 1, 2024 – July 5, 2026 by 10 agencies governing our covered industries. Retirement-plan tax treatment sits alongside financial-services and consumer-protection rules in that same window — the throughline across all of them is a hard effective date, a primary-source citation, and a defined population of affected entities, which is exactly the shape of this rule: effective November 17, 2025, citation 90 FR 44527, RIN 1545-BR11, codified at 26 CFR Part 1.

Tracking a single rule like this one in isolation is manageable for most firms. Tracking the full set as it accrues across a 10-agency, multi-year window is closer to the actual compliance workload accounting firms and their clients carry, especially firms that serve multiple plan sponsors across different industries — which is the reason this rule is being logged and cross-referenced against sibling rules rather than treated as a one-off. For a firm that already tracks Federal Register activity across several agencies for other clients, this rule simply becomes one more line item in that same index rather than a separate research exercise.

Frequently asked questions

When does the catch-up contributions rule take effect?

The regulations are effective on November 17, 2025. They were published in the Federal Register on September 16, 2025, at 90 FR 44527, giving plan sponsors and administrators roughly two months of lead time to update plan documents, payroll systems, and participant communications before the cutover.

What CFR part governs the catch-up contributions requirement?

The final regulations are codified at 26 CFR Part 1. That is the part of the federal regulations that houses this rule's implementing text, so any plan amendment language should trace back to that citation alongside the September 16, 2025 Federal Register notice.

What is the Federal Register citation for this rule?

The rule is published at 90 FR 44527 (RIN 1545-BR11), following its September 16, 2025 notice. Citing this reference directly is useful for a plan's compliance file, since it points to the authoritative text rather than a secondary summary.

Who do the catch-up contributions regulations affect?

The regulations affect participants in, beneficiaries of, employers maintaining, and administrators of retirement plans that permit participants who have attained age 50 to make additional elective deferrals. For accounting firms, that reaches any client relationship touching plan recordkeeping, payroll integration, or benefits-compliance advisory work.

What statutory change is this rule implementing?

The regulations reflect statutory changes made by the SECURE 2.0 Act of 2022, including a requirement that catch-up contributions made by certain catch-up eligible participants must be designated Roth contributions. 90 FR 44527 provides the operational guidance plan sponsors need to apply that statutory requirement.

Does the Roth designation requirement apply to every catch-up contribution?

No. Per the rule's own scope, the Roth designation requirement applies to catch-up contributions made by certain catch-up eligible participants — not to every age-50-plus deferral in every plan. Firms should confirm, plan by plan, which participants and contribution streams the requirement actually touches rather than assuming a blanket change across all clients.

What should accounting firms do first?

Start by identifying which client or in-house retirement plans permit catch-up contributions at all, since the Roth designation requirement in 90 FR 44527 only reaches plans and participants within that scope. From there, confirming recordkeeper and payroll capability ahead of November 17, 2025 is the single highest-leverage step before looping in plan counsel on documentation.

Related guidance

• Gross proceeds reporting by brokers — another accounting-lens brief on federal information-reporting obligations.

• Section 42 low-income housing credit average-income test — a related accounting-lens brief on federal tax-credit compliance.

• Extension of a federal compliance date for disclosure — another brief on a shifted federal compliance deadline.

Disclaimer

This brief is provided for informational purposes only and does not constitute legal or tax advice. It creates no attorney-client relationship and should not be relied on as a substitute for individualized advice; consult a qualified professional — tax counsel, ERISA counsel, or your plan's recordkeeper — before acting on anything described here.

Last reviewed: July 5, 2026

Every date, citation, RIN, CFR reference, and figure in this post is copied verbatim from the Federal Register and eCFR as of the snapshot date. Nothing is estimated, modeled, or extrapolated. This is not legal or tax advice.

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