Who, what, when, where, why: As of October 2026, retirement savers and plan sponsors across the United States are living with the practical effects of the SECURE 2.0 Act of 2022 (Pub. L. 117-328). Two provisions are driving conversations and planning choices this year: mandatory Roth treatment for certain catch‑up contributions in employer plans and a permanently reduced excise tax on missed required minimum distributions (RMDs). These statutory changes affect 401(k), 403(b) and governmental 457 plans, individual retirement accounts, pensions and the interaction with Social Security timing.

Context: why these two provisions still matter in 2026

SECURE 2.0, enacted December 29, 2022, contained hundreds of technical and substantive retirement provisions phased in over subsequent years. Two that changed routine behavior are:

  • Mandatory Roth treatment for certain catch‑up contributions. The law requires that catch‑up contributions for employees whose wages exceed the indexed threshold be treated as Roth (after‑tax) contributions in applicable employer plans. The statute set an initial threshold ($145,000) and then indexed it for inflation; plan administrators have applied the indexed figure for each plan year.
  • Lower excise tax on missed RMDs. The excise tax for failing to take an RMD was reduced from 50% to 25%, and can be reduced to 10% if the shortfall is corrected within the statutory correction window. That change is statutory and affects how advisers and custodians approach missed‑RMD remediation.

Both provisions are statutory (not merely guidance), so they continue to change tax timing and operational workflows rather than being optional best practices.

Specific changes and what we’ve learned through 2026

Across 2024–2026 plan years, three practical patterns have emerged.

  1. Payroll and communication errors were the predictable early problem. Many employers and third‑party administrators needed system updates to identify employees above the indexed threshold and to segregate catch‑up dollars into Roth accounts. Through 2025 and into 2026, recordkeepers issued participant notices and plan amendments; some small employers still required manual fixes in payroll mid‑year.
  2. Tax timing matters for high earners. For older workers making catch‑up contributions, a contribution that previously reduced taxable income may now create a higher ordinary‑income bill in the contribution year because catch‑up dollars are treated as Roth. That has influenced decisions on whether to reduce pre‑tax deferrals, accelerate deductions, or defer catch‑ups into a later year.
  3. RMD compliance and remediation became more pragmatic. The reduced excise tax changed the cost‑benefit analysis for remediation: in many cases, paperwork, trustee fees and withholding adjustments can still make immediate correction worthwhile, but the financial pain of an oversight is less likely to be catastrophic than under the old 50% penalty.

Details that matter to savers in October 2026

Practical facts and operational guidance for typical readers:

  • Which accounts are affected. The mandatory Roth catch‑up rule applies to applicable employer retirement plans (for example, 401(k) and 403(b) plans that permit catch‑ups). Traditional IRAs and Roth IRAs are not subject to the mandatory catch‑up conversion rule.
  • Threshold mechanics. The catch‑up threshold is the statutory, indexed compensation amount set in SECURE 2.0. If your W‑2 compensation for the plan year exceeds that indexed threshold, catch‑up contributions above the standard limit will be treated as Roth by the plan. Check your employer’s participant notice for the current indexed figure applied to your plan year.
  • RMD excise tax process. If you missed an RMD, Form 5329 remains the vehicle to report excise taxes. Under the statutory change, the base excise is 25%, reducible to 10% if corrected within the correction window and documented correctly. Work with your custodian to execute a corrective distribution and to obtain the documentation you’ll need for the tax return.

Impact: who is affected and how

  • High‑income older workers: Those age 50+ who rely on catch‑up contributions are most exposed to higher tax bills in the contribution year when their pay crosses the indexed threshold.
  • Plan sponsors and payroll teams: Employers must ensure payroll systems, plan documents and participant communications reflect Roth catch‑up treatment and the current indexed threshold—or risk participant surprise and tax misreporting.
  • Retirees and beneficiaries: Lower RMD penalties reduce the worst‑case cost of a missed distribution, but do not eliminate the need for robust RMD monitoring—missed distributions still trigger tax consequences and potential compliance work.

Reactions and industry practice as of October 2026

Advisers report a steady stream of client questions about unexpected tax bills from catch‑ups and about whether to unwind or accelerate Roth conversions. Many large recordkeepers and payroll providers completed system updates by mid‑2025; smaller plans and some third‑party payroll vendors continued manual processing into 2026.

Plan sponsors that invested in quarterly checks and proactive participant notices have seen fewer surprises. Meanwhile, fiduciaries are being advised to document operational decisions carefully: if a plan inadvertently treats catch‑ups incorrectly, the sponsor’s amendment and correction procedures will matter for participant tax outcomes.

What to do now — checklist for October 2026

  • Confirm the indexed catch‑up threshold your plan is using for the 2026 plan year with HR or the plan administrator.
  • Ask whether your payroll/recordkeeper treats catch‑up contributions as Roth automatically when your compensation exceeds the threshold; request written confirmation.
  • Model the tax impact of a Roth catch‑up versus reducing pre‑tax deferrals or shifting timing; run scenarios for years when you expect lower taxable income.
  • If you missed an RMD in 2024–2026, contact your custodian immediately to execute corrective distributions and collect documentation for Form 5329 and your return.
  • For advisers: update client onboarding, cashflow models and Social Security provisional‑income projections to reflect more Roth exposure and the lower RMD excise tax.

What’s next — what to watch for through year‑end and 2027

Watch for late‑calendar‑year participant communications from recordkeepers explaining 2027 indexed thresholds. Also monitor rulemaking or IRS guidance clarifying operational details of Roth catch‑up reporting and RMD correction procedures; any guidance released before the 2027 filing season will affect client remediation timelines.

How should I change tax or withdrawal timing strategies?

Consider accelerating Roth conversions or taxable income into years when you expect lower ordinary income, but model the total tax cost: mandatory Roth catch‑ups create after‑tax basis in plan accounts, which can reduce taxable income in future years. Consult your adviser and run multi‑year cashflow scenarios before accelerating conversions.

Can an employer reverse an incorrect Roth designation?

If a plan mistakenly treated a catch‑up as pre‑tax when it should have been Roth (or vice‑versa), the sponsor and recordkeeper must follow the plan correction procedures and IRS guidance. Prompt notice to affected participants and corrective plan amendments typically mitigate participant harm; consult your plan counsel or third‑party administrator.

What if I missed an RMD in a prior year?

Do not ignore it. Contact your custodian to complete the missed distribution, document the correction, and file Form 5329. The reduced statutory excise tax (25% base, 10% if corrected timely) lowers the monetary sting, but timely correction and documentation preserve tax outcomes and reduce future compliance risk.