Read this if you are a CFO, director of HR, or a retirement plan sponsor.
Beginning January 1, 2026, significant changes will affect catch-up contributions to retirement plans for high-earning individuals, sometimes referred to as ‘highly paid participants.’ This group of high-earning individuals will be more inclusive than the current definition of a Highly Compensated Employee. The new rules, enacted as part of recent legislative updates, specifically target plan participants whose prior-year compensation exceeds a set threshold and require that their catch-up contributions to 401(k), 403(b), and governmental 457(b) plans be made on a Roth (after-tax) basis.
This article provides an overview of these new requirements, focusing on the affected plan participants, and discusses the pros and cons as well as key considerations for employers and affected individuals in advance of the transition deadline on December 31, 2025. Importantly, plan sponsors will need to coordinate compliance with their payroll provider and retirement plan recordkeeper. Plan sponsors will also need to communicate the new rules to the affected plan participants.
Overview of 2026 Roth catch-up contribution changes
Under current law, individuals age 50 and older can make catch-up contributions to employer-sponsored retirement plans, such as 401(k), 403(b), and eligible governmental 457(b) plans. Historically, these catch-up contributions could be made on either a pre-tax or Roth basis, depending on plan provisions and the participant’s salary deferral election. Starting January 1, 2026, however, plan participants whose prior-year Social Security wages with the employer equal at least $145,000 (indexed annually beginning in 2026) will be required to make all catch-up contributions as Roth contributions. This means these contributions will be made with after-tax dollars and will not be tax-deductible, but qualified withdrawals in retirement generally will be tax-free.
Significantly, any Roth salary deferral contributions made by a high earner (e.g., a regular deferral contribution or a catch-up contribution) count towards satisfying the Roth catch-up requirement. This means that if a high earner is already making regular Roth deferrals, they would not be required to make Roth catch-up contributions after the normal salary deferral limit (i.e., $23,500 for 2025) is reached as long as the Roth contributions exceed the catch-up limit (i.e., $7,500 for 2025). The plan sponsor may default those contributions that are over the normal salary deferral limit to Roth treatment, but the plan must allow the high earner to choose to make catch-up contributions on a pre-tax basis (assuming they have already made the required amount of Roth contributions). Essentially, this means a plan sponsor can only mandate Roth treatment for contributions up to the dollar amount of that year’s catch-up limit (i.e., $7,500 for 2025).
New 2026 Roth rules for partners, other self-employed individuals, and owners
The relevant guidance clarifies that a participant who does not have Social Security wages, such as a partner with self-employment income, will not be subject to the Roth catch-up requirement. This group would also include sole proprietors and members of an LLC taxed as a partnership.
However, the Roth catch-up requirement will apply to owners of a C-Corp or S-Corp who have Social Security wages equal to at least $145,000 (indexed) reported on Form W-2, Box 3.
Other pertinent Roth 2026 rule changes to consider
Wage limit is not pro-rated: The relevant guidance states the Social Security wage amount (i.e., $145,000, indexed) is not pro-rated for an employee’s partial year of employment. For example, an employee who is hired on September 1, 2025, at a $200,000 salary will not be subject to the Roth catch-up requirement in the 2026 plan year because the employee’s Social Security wages would only be approximately $66,600 for the 2025 calendar year.
Employer definition: The relevant employer is the common law employer of the plan participant. The final regulations allow a plan to aggregate the Social Security wages a participant receives from all employers in a controlled group and/or where a common paymaster is used. If a plan sponsor wants to take advantage of this permissible aggregation, however, it must specify in the plan which aggregation method it is using and what groups are being aggregated.
Deemed elections: A plan may provide that an election by a participant subject to the Roth catch-up contribution requirement to make salary deferral contributions on a pre-tax basis will be treated as a deemed election to make catch-up contributions as designated Roth catch-up contributions. If a plan will apply deemed elections, the plan document must provide for them and must permit participants to change their deemed elections. Alternatively, a plan sponsor could require the affected plan participant to make a separate election for Roth catch-up contributions.
Super catch-up contributions: Made by participants who attain age 60 to 63 during a calendar year, these contributions are subject to the Roth catch-up contribution requirement.
Employers will need to track compensation across all relevant categories to ensure compliance and retirement plan administrators will need to update procedures to enforce the Roth catch-up rule for affected participants.
Pros and cons of the 2026 Roth catch-up requirement
Pros:
Cons:
Actions for employers and high earners before December 31, 2025
With the new Roth catch-up requirement taking effect on January 1, 2026, employers and affected high earners should take proactive steps in 2025 to prepare for the transition:
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Review plan documents: Employers should ensure that their retirement plan documents support Roth catch-up contributions, updating them if necessary.
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Assess payroll and administrative systems: Ensure systems can accurately track compensation and enforce the Roth catch-up requirement for high earners.
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Communicate with participants: Provide clear information to employees about the upcoming changes, how compensation is calculated, and the implications for their retirement savings.
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Tax planning: The affected plan participants should consult with tax advisors to assess the impact of losing the pre-tax catch-up option and to explore strategies for minimizing overall tax liability.
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Maximize pre-tax catch-up contributions in 2025: Eligible individuals may wish to maximize their pre-tax catch-up contributions before the new requirement takes effect.
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Evaluate Roth vs. pre-tax savings: Consider the long-term benefits of Roth savings, including tax-free withdrawals and estate planning advantages, versus the short-term impact on taxable income.
Start planning now for 2026 Roth changes
The new Roth catch-up contribution requirement for certain plan participants marks a significant shift in retirement plan rules. While the change offers potential long-term tax benefits, it also increases current tax liability and administrative complexity. Employers and affected individuals should use the time before December 31, 2025, to review plan provisions, communicate with participants, and engage in strategic tax planning to ensure a smooth transition and take full advantage of available retirement savings opportunities.
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