Catch-Up Contributions and the 2026 Roth Rule

A payroll rule that most people have never heard of is about to decide, dollar for dollar, whether some of the money they set aside for retirement this year gets taxed now or taxed never. Starting with the 2026 plan year, workers age 50 and older who earned more than a set wage amount from their employer the year before can no longer choose how their catch-up contributions are taxed. The choice has been made for them, by law.

This is the Roth catch-up mandate created by Section 603 of the SECURE 2.0 Act, and after two rounds of IRS delay, it is finally operative. If you’re a higher earner nearing retirement and you’ve been adding extra money to your 401(k), 403(b), or governmental 457(b) every year once you hit 50, this rule changes the mechanics of that decision in ways that ripple into your paycheck, your tax return, and your plan’s payroll system.

Why a 2022 Law Is Only Biting Now

SECURE 2.0 became law in December 2022, and Section 603 of that act was written to take effect for taxable years beginning after December 31, 2023. Payroll administrators, recordkeepers, and plan sponsors looked at the statutory text and realized almost immediately that it created a problem nobody had solved: most 401(k) systems had no mechanism to check an employee’s prior-year wages from a specific employer, flag anyone above a dollar threshold, and force their catch-up deferrals into a separate Roth bucket mid-payroll-cycle.

The IRS responded in August 2023 with Notice 2023-62, granting a two-year administrative transition period. In practice, that meant 2024 and 2025 became a grace window: plans could keep allowing pre-tax catch-up contributions for everyone, high earners included, without violating the statute. Proposed regulations followed in January 2025, and the Treasury and IRS issued final regulations in September 2025, locking in January 1, 2026 as the real, enforceable start date. That’s the reason this topic is surfacing in 401(k) enrollment materials, payroll memos, and open-enrollment webinars right now: the transition relief has run out, and 2026 is the first plan year where the rule has teeth.

The stakes are not trivial. A worker in their early 60s can defer up to $34,750 into a 401(k) in 2026 once catch-up amounts are included, and for someone above the wage threshold, a meaningful slice of that money now has to go in after-tax. That changes take-home pay this year and changes the tax character of a chunk of the account for good.

The $145,000 Wage Test: Who Actually Gets Pulled In

The rule doesn’t look at your income tax bracket, your household income, or your net worth. It looks at one specific number: the Social Security (FICA) wages reported in Box 3 of your W-2 from the employer sponsoring the plan, for the calendar year immediately before the one in which you’re making the catch-up contribution. For 2026 catch-up contributions, that means your 2025 W-2 wages from that employer.

The statutory threshold is $145,000, set as a 2023 baseline and indexed for inflation in $5,000 increments once cumulative cost-of-living adjustments justify a step up. As of the 2026 plan year, the applicable figure remains $145,000, since the indexing mechanism hasn’t yet crossed the next $5,000 boundary. Plan sponsors are required to re-check this figure every year, since a modest raise can push a saver over the line one year and a job change can pull them back under it the next.

What Counts, and What Doesn’t

Only wages from the specific employer that sponsors the plan count. If you moonlight for a second employer, or your spouse earns seven figures, or you have substantial 1099 income, none of that touches the test. Self-employment earnings are excluded entirely because the rule is anchored to FICA wages, and self-employed individuals don’t generate FICA wages in the traditional sense; they pay self-employment tax instead. A solo 401(k) owner with no W-2 wages from the sponsoring entity is generally outside the mandate’s reach, though the analysis gets more nuanced for S-corporation owners who do pay themselves a W-2 wage.

The Mid-Year Job Change Wrinkle

Because the test is employer-specific, changing jobs resets it. Someone who earned $210,000 at Employer A last year but joins Employer B this year, and earned nothing from Employer B last year, is treated, at Employer B’s plan, as having zero prior-year wages from that employer. Final regulations clarify that in this scenario, the new employer generally may not apply the Roth mandate for that first year, since there’s no prior-year wage data from that specific plan sponsor to test against. That’s a meaningful planning wrinkle for executives changing jobs mid-career, and it’s a detail payroll departments frequently get wrong in the first year of a new hire’s catch-up eligibility.

Predecessor Employers and Controlled Groups

Where a business is acquired, merges, or is part of a controlled group of related companies, wages paid by a predecessor employer can carry over for purposes of this test, and wages are aggregated across commonly controlled entities that share a plan. This prevents a simple corporate restructuring from being used to reset an employee’s wage history and dodge the mandate.

Which Plans, Which Dollars: Scope of the Mandate

The Roth catch-up requirement is narrowly drawn. It applies to age-50-and-over catch-up contributions (including the enhanced age 60-63 catch-up) made to 401(k) plans, 403(b) plans, and governmental 457(b) plans. It has nothing to do with the base elective deferral limit: the first $23,500 you defer in 2026 can still be pre-tax or Roth, at your normal election, entirely independent of your wage level.

What the Mandate Leaves Alone

• SIMPLE IRA and SIMPLE 401(k) catch-ups are governed by a separate SECURE 2.0 provision and are not swept into this particular wage-based mandate.
• Traditional and Roth IRA catch-up contributions (the extra $1,000 available to savers 50 and older) are untouched, since IRAs are not employer-sponsored plans and the statute only reaches employer plans.
• Non-governmental 457(b) plans, typically used by tax-exempt organizations for a small group of executives, fall outside the mandate’s defined scope.
• Employer contributions, whether matching or nonelective, are never subject to this rule regardless of your wages, because the mandate only governs employee catch-up deferrals, not employer money.

This matters because it’s easy to conflate “high earner” tax provisions in retirement plans generally with this specific one. A worker who’s above the wage threshold at their 401(k) job but also has a Traditional IRA on the side can still make a pre-tax IRA catch-up contribution if they’re otherwise eligible; the mandate doesn’t reach that account.

No Roth Feature, No Catch-Up: The Plan-Design Trap

Here’s the part that catches plan sponsors off guard. The final regulations don’t say that a plan without a Roth deferral option gets to keep offering pre-tax catch-up to affected high earners as a fallback. They say the opposite: if the plan doesn’t have a designated Roth contribution program, then employees who are subject to the mandate simply cannot make catch-up contributions at all, in any form, until the plan adds a Roth feature.

That’s a serious problem for smaller plans and older plan documents that were written before Roth deferrals became standard. A manufacturing company with a decades-old 401(k) that never bothered adding a Roth option could suddenly find its highest-paid, longest-tenured employees, often the people closest to retirement and most reliant on catch-up room, locked out of an extra $7,500 to $11,250 of tax-advantaged saving in 2026, purely because of a plan-design gap that has nothing to do with their individual choices.

The practical fix is for plan sponsors to add a Roth deferral feature before the affected plan year begins, which requires a plan amendment and, in many cases, payroll and recordkeeping system updates to track and route Roth catch-up money correctly. Employees at smaller employers should ask HR or their plan administrator directly whether the plan currently offers Roth deferrals, rather than assume it does just because larger competitors’ plans typically do.

Employees who are shopping for a first job in their late career years, or evaluating a job offer, might also want to check this detail if catch-up capacity is central to their retirement math; our plain-language guide to how 401(k) plans work walks through Roth versus traditional elections and vesting basics that are useful context before diving into the catch-up specifics here.

Worked Example: Two Colleagues, Same Birthday, Different Tax Bill

Numbers make this concrete faster than rules do. Consider two coworkers at the same mid-sized firm, both turning a milestone birthday in the “extra catch-up” window, both maximizing their contributions in 2026.

Maria, Age 61, Wages $210,000

Maria’s 2025 Medicare wages from her employer were $210,000, well above the $145,000 threshold. Because she’s 61, she falls into the age 60-63 “super catch-up” band, which allows $11,250 in catch-up contributions for 2026, on top of the standard $23,500 deferral limit, for a possible total of $34,750.

Because her wages exceed the threshold, all $11,250 of her catch-up must be designated Roth. She doesn’t get to choose pre-tax. Assuming a 32% marginal federal tax rate, that Roth designation costs her an additional $3,600 in current-year tax exposure (11,250 × 0.32) compared with what she would have owed if that same $11,250 had been deferred pre-tax. In exchange, that $11,250, and every dollar it earns for the rest of her working life and retirement, comes out completely tax-free at withdrawal, assuming she meets the five-year holding period and age requirements for a qualified Roth distribution.

David, Age 55, Wages $128,000

David’s 2025 wages were $128,000, below the $145,000 line. He’s in the standard 50-plus catch-up band, so his 2026 catch-up ceiling is $7,500. Because he’s under the threshold, his plan lets him choose: pre-tax or Roth. He elects pre-tax, reasoning that he expects a lower marginal rate in retirement than his current 24% bracket. That election defers $1,800 in tax (7,500 × 0.24) into the future rather than paying it now.

Same employer, same plan document, same general age bracket, yet different outcomes purely because of a wage line that has nothing to do with either person’s actual retirement readiness. Maria, arguably closer to retirement and more sensitive to short-term cash flow, has no say in the matter; David, further from retirement, retains full flexibility.

2026 Catch-Up Rules at a Glance

The table below lines up the moving pieces: age band, dollar ceiling, and Roth treatment based on wage tier.

A useful way to picture the wage line: $145,000 is the marker that sorts savers into “your choice” or “Roth only” for catch-up dollars, and it resets every year based on the prior year’s wages from that specific employer.

Mistakes That Trip Up Employees and Plan Sponsors Alike

Testing the Wrong Year’s Wages

The test looks backward one full calendar year. Employees sometimes assume their current-year salary decides their catch-up tax treatment; it doesn’t. A raise that pushes 2026 pay above $145,000 has zero effect on 2026 catch-up treatment, since that’s governed by 2025 wages. The effect shows up the following year instead.

Forgetting That a Job Change Resets the Clock

Employees who switch jobs mid-career sometimes assume their wage history follows them. It generally doesn’t, except in acquisition or controlled-group scenarios. A high earner who changes employers can find themselves temporarily outside the mandate at the new job in year one, simply because the new employer has no prior-year wage data to test against.

Assuming a Missing Roth Option Defaults to Pre-Tax

This is the costliest misunderstanding. Plan sponsors without a Roth feature sometimes assume affected employees will just keep contributing pre-tax as a fallback. The final regulations don’t allow that. The result, absent a plan amendment, is that affected employees lose catch-up eligibility entirely for the year, an outcome nobody intended and one that can trigger corrective action and employee relations headaches.

Conflating This Rule With the Age 60-63 Super Catch-Up

The enhanced catch-up amount for ages 60 through 63 is a separate SECURE 2.0 feature that raises the dollar ceiling; the Roth mandate is a separate rule about tax treatment that layers on top of whatever ceiling applies. A 62-year-old at $200,000 in wages faces both: the higher $11,250 ceiling and the Roth-only requirement.

Ignoring Payroll System Defaults

Some payroll and recordkeeping systems, especially at smaller employers still updating for 2026, may default new catch-up elections to pre-tax unless an employee actively selects Roth, or unless the system has been reprogrammed to auto-route affected employees. Employees near or above the threshold should confirm directly with HR or the recordkeeper how their specific catch-up dollars are being coded for 2026, rather than assuming the system caught the change automatically.

Overlooking the Compensation Aggregation Rule

Employees who work for two related companies under common ownership sometimes assume only their primary paycheck counts. If the entities are part of a controlled group sharing the same plan, wages are aggregated for purposes of the $145,000 test.

Practical Checklist Before You Lock In Your 2026 Deferral Election

• Pull your 2025 W-2 and check Box 3 or Box 5 wages from your current employer against the $145,000 threshold before assuming either outcome.
• Confirm with HR or your plan administrator whether your specific plan currently offers a designated Roth deferral feature, and don’t assume it does.
• If you changed employers during 2025 or 2026, ask specifically how the wage test applies to your new employer’s plan for this year.
• If you’re in the age 60-63 band, confirm your plan has actually adopted the higher $11,250 super catch-up ceiling; adoption isn’t automatic for every plan.
• Review your paycheck stub after your first 2026 catch-up contribution posts to verify it was coded Roth or pre-tax as expected, rather than waiting until tax season to discover a coding error.
• If your wages hover near $145,000, model both scenarios for next year’s contribution planning, since a modest raise or bonus can flip your treatment in either direction.
• If your plan lacks a Roth option and you’re affected, ask when a plan amendment is planned; don’t assume your catch-up contributions are still being accepted in the meantime.
• Coordinate with a tax professional if the extra current-year tax bill from mandatory Roth catch-up materially affects your withholding or estimated payments.

Key Takeaways

• Starting with the 2026 plan year, catch-up contributions to 401(k), 403(b), and governmental 457(b) plans must be Roth for anyone whose prior-year FICA wages from that specific employer exceeded $145,000.
• The rule only reaches catch-up dollars: the standard elective deferral limit of $23,500 keeps its normal pre-tax-or-Roth flexibility regardless of wages.
• A plan without a Roth deferral feature can’t fall back to pre-tax catch-up for affected employees; those employees lose catch-up eligibility until the plan adds Roth.
• The wage test looks at the prior calendar year and resets with employer changes, so job switches, raises, and bonuses all shift who’s affected and when.
• SIMPLE plans, non-governmental 457(b) plans, and IRA catch-up contributions sit outside this particular mandate.
• Mandatory Roth treatment costs more in current-year taxes but converts that money and its future growth into tax-free retirement income, assuming a qualified distribution down the road.

Frequently Asked Questions

Does the Roth catch-up mandate apply to every retirement plan?

No. It applies specifically to catch-up contributions in 401(k) plans, 403(b) plans, and governmental 457(b) plans. It does not apply to SIMPLE IRAs, SIMPLE 401(k)s, non-governmental 457(b) plans, or Traditional and Roth IRA catch-up contributions.

What wage number determines whether I’m affected in 2026?

Your 2025 FICA (Social Security/Medicare) wages from the employer sponsoring the plan, as reported on your W-2. If those wages exceeded $145,000, your 2026 catch-up contributions to that employer’s plan must be Roth.

What happens if my plan doesn’t offer a Roth option and I’m above the wage threshold?

Under the final IRS regulations, you cannot make catch-up contributions at all in that case; the plan doesn’t default you to pre-tax. Your employer would need to amend the plan to add a Roth deferral feature before you could resume catch-up contributions.

Does a job change reset the wage test?

Generally yes, because the test is specific to wages paid by the plan’s sponsoring employer. Someone who switches employers typically has no prior-year wage history at the new employer’s plan, so the mandate usually doesn’t apply there in the first year, aside from acquisition or controlled-group situations where wage history can carry over.

Is the $145,000 threshold the same every year?

It’s indexed for inflation in $5,000 increments once cumulative cost-of-living adjustments justify a step up. It was set at $145,000 as a 2023 baseline and remains $145,000 for the 2026 plan year, since the indexing formula hasn’t yet crossed the next increment.

Does this rule change how much I’m allowed to contribute?

No. The dollar ceilings themselves, $7,500 for ages 50-59 and 64-plus, and $11,250 for ages 60-63 in 2026, are unaffected by this rule. The mandate only changes the tax character (Roth versus pre-tax) of the catch-up dollars for people above the wage threshold; it doesn’t raise or lower how much anyone can contribute.

References

• Internal Revenue Service, “Treasury, IRS Issue Final Regulations on New Roth Catch-Up Rule, Other SECURE 2.0 Act Provisions,” IRS Newsroom, September 2025.
• Internal Revenue Service, Notice 2023-62, “Guidance on Section 603 of the SECURE 2.0 Act: Catch-Up Contributions,” August 2023.
• Internal Revenue Service, “SECURE 2.0 Act Changes Affecting Catch-Up Contributions,” Retirement Plans FAQ pages, IRS.gov.
• U.S. Congress, SECURE 2.0 Act of 2022, Section 603 (Roth Catch-Up Contributions), enacted as part of the Consolidated Appropriations Act, 2023.
• Internal Revenue Service, “401(k) and IRA Contribution Limits,” annual COLA announcements, IRS.gov.