For more than 20 years, workers over 50 have been able to stash extra money in their 401(k) on a pre-tax basis, shaving thousands off their annual tax bill in the process. That option just disappeared for a significant slice of the workforce.
As of January 2026, any employee whose employer-paid wages topped $145,000 in the prior year must funnel catch-up contributions into an after-tax Roth account. The upfront deduction is gone. The money gets taxed before it enters the plan. And for workers who have built their retirement savings strategy around that deduction, the shift demands immediate attention.
This is not a proposal working its way through Congress. The Treasury Department and the IRS published final regulations in January 2025, and the mandatory Roth requirement took effect for taxable years beginning after December 31, 2025. If you are affected, the catch-up contribution on your next paycheck is already being treated differently than the one you made last year.
The law behind the change
The mandate comes from Section 603 of the SECURE 2.0 Act, signed into law in December 2022 as part of the Consolidated Appropriations Act, 2023. Congress decided that higher earners should no longer receive a front-end tax break on catch-up contributions. Instead, those dollars must be designated as Roth: contributed with after-tax money, but allowed to grow and be withdrawn tax-free in retirement.
A critical detail: the $145,000 threshold is based on FICA wages paid by your sponsoring employer in the prior calendar year, not your total household income. Investment income, a spouse’s salary, and freelance earnings do not count toward the cutoff. The threshold is indexed to inflation and will adjust upward in future years, though the IRS has not yet published specific figures beyond the initial $145,000 amount.
The final regulations also spell out how employers must identify affected participants, track prior-year wages, and route catch-up dollars into Roth accounts. If your employer’s plan does not currently offer a Roth 401(k) option, the plan must add one or stop accepting catch-up contributions from higher-earning workers altogether. The same rules apply to 403(b) plans and governmental 457(b) plans, meaning public-sector and nonprofit employees are not exempt.
What this means for your paycheck
The math is straightforward, and it hurts in the short term.
Consider a 55-year-old earning $170,000. Under the old rules, that worker could defer up to the standard 401(k) limit (set at $23,500 for 2025; the IRS typically announces the following year’s limit each autumn) plus a $7,500 catch-up contribution, all on a pre-tax basis. That catch-up alone shaved $7,500 off taxable income, saving roughly $1,650 to $2,475 in federal taxes depending on the marginal bracket.
Under the new rule, the same $7,500 catch-up must go into a Roth account. The money is taxed before it enters the plan, so the worker’s take-home pay drops by the tax owed on those dollars. For someone in the 24% federal bracket, that is an additional $1,800 out of pocket each year. In a high-tax state like California or New York, the combined federal and state hit is steeper still.
Workers between ages 60 and 63 face an even larger swing. SECURE 2.0 created an enhanced catch-up limit for that narrow age window, set at $11,250 for 2025. For higher earners in that group, the entire enhanced amount must now be Roth, meaning a bigger upfront tax bill but a potentially larger pool of completely tax-free retirement income down the road.
Workers whose prior-year employer wages were $145,000 or less are unaffected. They can continue making catch-up contributions on a pre-tax basis, a Roth basis, or a combination, depending on what their plan allows.
The grace period has expired
Employers had roughly three years to prepare. In 2023, the IRS acknowledged that payroll systems and plan documents needed overhauling and issued administrative relief (Notice 2023-62) confirming that pre-tax catch-up contributions would still be permitted through the end of 2025, regardless of income.
That grace period is now over. As of January 2026, plan sponsors are expected to have systems in place to flag participants whose prior-year wages exceeded $145,000 and to automatically designate their catch-up contributions as Roth. Employers that have not updated their plans risk compliance failures, and affected workers who assume their contributions are still pre-tax could face unexpected tax consequences when they file their returns.
Gaps that still need answers
The final regulations resolved many open questions, but several practical gaps remain.
The IRS has not yet published the inflation-adjusted $145,000 threshold for 2027 and beyond, leaving workers whose income sits near the cutoff unable to plan with precision. If you earned $143,000 from your employer last year and expect a raise or a strong bonus cycle, you may not know until late in the year whether you will cross the line for the following year’s contributions.
Employers have raised concerns about tracking wages accurately for workers who switch jobs mid-year, hold positions across related corporate entities, or receive variable compensation like commissions and performance bonuses. The final regulations address some of these scenarios, but benefits consultants report that edge cases, particularly involving controlled groups of companies, still lack clear guidance.
There is also no official estimate of how many workers are directly affected. Bureau of Labor Statistics data from 2023 indicates that roughly 15% of full-time wage and salary workers earned $150,000 or more annually, but not all of them participate in employer-sponsored retirement plans or make catch-up contributions. Industry groups like the Plan Sponsor Council of America have tracked catch-up participation rates in annual surveys, but no government agency has modeled the specific population subject to this rule.
A related concern: some smaller employers may decide that adding a Roth option is not worth the administrative cost, which would block their higher-earning workers from making any catch-up contributions at all. The IRS has directed employers and participants to monitor its website for updated FAQs and future guidance.
Why some planners say the Roth shift has a real upside
Losing a tax deduction in the current year is never painless, but the forced Roth treatment carries a benefit that is easy to overlook when you are staring at a smaller paycheck.
Every dollar that enters a Roth account grows tax-free, and qualified withdrawals after age 59½ owe nothing to the IRS or to state tax authorities in most states. For workers who expect to remain in a similar or higher tax bracket in retirement, or who believe Congress will raise rates in the future, Roth contributions can produce more spendable income over a 20- or 30-year retirement than the same dollars contributed pre-tax.
Roth 401(k) balances also carry an advantage for heirs. Unlike traditional pre-tax accounts, inherited Roth 401(k) funds can be withdrawn by beneficiaries without triggering income tax, which can preserve more wealth across generations, particularly under the 10-year distribution rule that now applies to most non-spouse beneficiaries.
That said, the benefit depends heavily on individual circumstances. A worker five years from retirement with a large pre-tax balance may see limited upside from a forced Roth switch on catch-up dollars alone. A worker in their early 50s with decades of compounding ahead stands to gain significantly more from tax-free growth. Financial planners generally recommend running projections based on your own income trajectory, expected retirement spending, and assumptions about future tax policy before deciding whether this change is a setback or a long-term advantage.
What to do before your next contribution
If you are over 50 and your employer-paid wages exceeded $145,000 in 2025, your catch-up contributions in 2026 must be Roth. Here is what that means in practice:
Confirm your plan offers a Roth 401(k) option. If it does not, contact your HR department or plan administrator now. Plans that fail to add a Roth option will have to block higher-earning participants from making catch-up contributions entirely, costing you the ability to save an extra $7,500 or more per year in a tax-advantaged account.
Adjust your budget for lower take-home pay. Roth contributions are made with after-tax dollars, so your net paycheck will be smaller than it was when catch-up dollars were pre-tax. Run the numbers: multiply your catch-up amount by your combined federal and state marginal tax rate to estimate the annual hit, then spread it across pay periods so the change does not create a cash-flow surprise.
Look at your full savings picture. Catch-up contributions are only one piece of a retirement plan. You may also have access to a Health Savings Account (which offers its own triple tax advantage), a backdoor Roth IRA, deferred compensation plans, or taxable brokerage accounts. A tax advisor can help you decide how to allocate dollars across accounts for the best after-tax outcome given the new rules.
Do not stop contributing. The worst response to a rule change is to walk away from tax-advantaged retirement savings. Even without the upfront deduction, catch-up contributions still compound in a sheltered account. And if your employer matches any portion of those dollars, skipping contributions means leaving compensation on the table.
Paul Anderson is a finance writer and editor at The Financial Wire. He has spent seven years writing about investment strategies and the global economy for digital publications across the US and UK. His work focuses on making sense of economic policy, cost-of-living issues, and the stories that affect everyday Americans.
