A 55-year-old marketing director earning $160,000 used to stash an extra $7,500 into her 401(k) each year on a pre-tax basis, shaving roughly $1,800 off her annual federal tax bill. That option no longer exists. Starting in January 2026, every dollar of her catch-up contribution must go into a Roth account, taxed upfront, with no pre-tax alternative available.
This is not a proposal working its way through Congress. It is settled federal law, enacted as Section 603 of the SECURE 2.0 Act, which President Biden signed in December 2022. The IRS and Treasury Department finalized the implementing regulations in early 2025 (TD 10027), and the two-year administrative grace period the IRS gave employers through Notice 2023-62 expired at the end of 2025. The rule is now fully in effect.
Who is affected and how the threshold works
The mandate targets a specific slice of the workforce: employees aged 50 or older whose prior-year W-2 wages from the employer sponsoring the plan exceeded $145,000. That figure is indexed for inflation under the statute, though as of June 2026 the IRS has not announced an adjusted threshold for the 2027 tax year. For 2026 contributions, $145,000 remains the operative line, based on 2025 wages.
Two details trip people up. First, the threshold looks only at wages from the plan sponsor. It ignores total household income, freelance revenue, rental income, and investment gains. A worker earning $140,000 from an employer and $80,000 from a rental portfolio stays below the cutoff. Second, the test is backward-looking: your 2025 W-2 determines your 2026 treatment. There is no mechanism to adjust mid-year if your income drops.
Workers below the threshold keep the flexibility they have always had. They can split catch-up contributions between pre-tax and Roth accounts, depending on what their plan allows. The mandate only narrows options for those above the wage line.
The dollar impact on your paycheck
For 2026, the standard catch-up contribution limit for workers 50 and older remains $7,500, on top of the regular 401(k) deferral limit. Under the old rules, a high earner in the 24% federal bracket who made that full catch-up pre-tax kept an extra $1,800 in take-home pay during the year. Under the new rule, that $7,500 is taxed on the way in. The paycheck shrinks accordingly, and state income taxes can widen the gap further depending on where you live.
The hit is steeper for workers aged 60 through 63. SECURE 2.0 created a super catch-up for that age band, raising the limit to $11,250 starting in 2025. A 61-year-old in the 32% bracket who maxes out the super catch-up under Roth-only rules will pay roughly $3,600 more in current-year federal income tax than they would have under pre-tax treatment. Add a state like California or New York, and the upfront cost climbs higher still.
The trade-off is not all downside. Roth contributions grow tax-free, and qualified withdrawals in retirement come out tax-free as well. For someone who expects to remain in a similar or higher bracket after they stop working, paying taxes now and locking in decades of tax-free growth can be the better long-term deal. But for workers who plan to drop into a lower bracket in retirement, the forced Roth treatment removes a valuable planning lever they used to control.
What employers need to have in place
Plan sponsors carry the compliance burden. Under the final regulations, codified at 26 CFR Section 1.414(v)-2, employers must identify which participants crossed the $145,000 wage threshold in the prior year and ensure their payroll systems code those workers’ catch-up contributions as Roth. Plans that do not already offer a designated Roth account need to add one or stop offering catch-up contributions to affected employees altogether.
The administrative transition period from Notice 2023-62 gave employers two full years to update recordkeeping, payroll software, and participant communications. That window closed at the end of 2025. Employers who have not completed the work are now operating outside the safe harbor, which opens the door to plan qualification issues and corrective headaches that can be expensive to unwind.
The cliff problem and other unresolved tensions
Several practical questions remain open as of June 2026, and they matter most to workers whose income lands near the threshold.
Variable compensation creates what amounts to a cliff. An executive whose year-end bonus pushes 2025 wages one dollar above $145,000 is locked into Roth-only catch-ups for all of 2026, even if 2026 earnings fall well below the line. The statute offers no mid-year adjustment, and the regulations do not address whether employers can or should prorate. A single strong year can trigger twelve months of higher-tax treatment with no escape hatch.
Public-sector plans add another layer of complexity. Governmental 457(b) plans have their own catch-up rules, including a separate “last three years before retirement” catch-up that operates differently from the age-50 catch-up in private-sector 401(k) plans. The final regulations do not include tailored guidance for coordinating these overlapping regimes. Public employers and their participants should watch for future IRS notices or revenue procedures that clarify the interaction.
Then there is the behavioral question no one can answer yet. Will high earners simply absorb the tax hit and keep maxing out catch-ups? Or will some redirect savings into health savings accounts, taxable brokerage accounts, backdoor Roth IRA strategies, or spousal retirement plans? Those shifts will determine whether the rule genuinely strengthens long-term retirement security or mainly pulls tax revenue forward for the federal government.
A mid-year checklist for affected workers
If your 2025 W-2 wages from your employer exceeded $145,000, the Roth catch-up mandate applies to every catch-up dollar you contribute in 2026. With half the year still ahead, here is what to verify now:
- Confirm your plan offers a Roth option. If it does not, you cannot make catch-up contributions at all under the new rule. Ask your HR or benefits team immediately.
- Check your contribution elections. Some payroll systems automatically switched catch-up contributions to Roth at the start of the year. Others require a manual change. Verify before your next pay cycle so you are not caught with rejected deferrals.
- Model the tax impact with real numbers. At a 24% federal bracket, $7,500 in Roth catch-ups costs $1,800 more in current-year federal taxes than the same amount pre-tax. At 32%, the gap is $2,400. At 35%, it is $2,625. Factor in your state rate for the full picture, and work with a tax professional if the math gets complicated.
- Evaluate the super catch-up. If you are between 60 and 63, your catch-up limit is $11,250, not $7,500. The higher ceiling amplifies both the current tax cost and the long-term Roth benefit. Whether the trade-off favors you depends on your expected retirement tax bracket and time horizon.
- Watch for the inflation adjustment. The $145,000 threshold is indexed. The IRS typically announces the following year’s figure in the fall. If your wages are near the line, a small adjustment could move you in or out of the mandate for 2027.
- Consider your broader savings mix. If the forced Roth treatment changes your tax planning, look at whether redirecting some savings to an HSA (if eligible), a taxable brokerage account, or a spousal IRA makes sense as a complement to your 401(k) strategy.
The IRS maintains a dedicated SECURE 2.0 resource page where new guidance, notices, and FAQs are posted as they are issued. Until the remaining gray areas are resolved, the safest approach is to follow the plain language of the statute and final regulations and to document any judgment calls with the help of a qualified tax or benefits advisor.
Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
