The regulatory landscape governing retirement planning is undergoing a significant transition. Under the SECURE 2.0 Act, high-income earners face a mandatory shift in how they execute catch-up contributions to their employer-sponsored retirement plans. Originally slated for an earlier implementation, the IRS has provided an administrative grace period, moving the effective date to January 1, 2026.

At InSight Financial Planners, we utilize our proprietary InSight-Full® planning process to ensure our clients, particularly those with over $1m in Assets Under Management (AUM), are prepared for these technical shifts. Coordination between tax liability and investment growth is a hallmark of our methodology.

Here are the 10 critical elements high earners must understand regarding the mandatory Roth catch-up requirements.

1. The 2025 Wage Threshold for 2026 Compliance

The mandatory Roth catch-up rule applies to participants whose prior-year wages exceed a specific threshold. While the SECURE 2.0 Act initially established a $145,000 limit, the IRS has indexed this figure for inflation. For the 2026 plan year, the threshold is determined by your 2025 FICA wages. If your wages from the employer sponsoring the plan exceed $150,000 in 2025, any catch-up contributions you make in 2026 must be designated as Roth.

2. The Definition of “Wages”

It is vital to distinguish which income sources count toward the $150,000 threshold. The IRS utilizes FICA-taxable wages, typically found in Box 3 (Social Security wages) of your Form W-2. This is a crucial metric, as it often differs from your total compensation or Adjusted Gross Income (AGI). Understanding this leading indicator is a core component of the “Organize & Formalize” stage of our InSight-Full® process.

3. The Mandatory Transition to After-Tax Dollars

Currently, many high earners utilize catch-up contributions (available to those age 50 and older) to reduce their current-year taxable income through pre-tax deferrals. Starting in 2026, those above the threshold lose the ability to make pre-tax catch-up contributions. These funds must now be contributed on a Roth (after-tax) basis. While this removes the immediate tax deduction, it secures tax-free growth and tax-free distributions in retirement.

4. The Administrative Grace Period

The IRS issued Notice 2023-62, which provided a two-year “administrative transition period.” This delay was a response to the technical challenges faced by plan sponsors and payroll providers in updating their systems to track prior-year wages and route contributions correctly. For high earners, this means you have through the end of 2025 to continue making pre-tax catch-up contributions, regardless of your income level.

5. Employer-Specific Income Tracking

The $150,000 threshold is employer-specific. If you change employers mid-year or work for multiple unrelated entities, the wage test applies only to the wages earned from the specific employer sponsoring the plan. You could potentially earn $140,000 at one firm and $140,000 at another; in this scenario, neither employer would be required to mandate Roth catch-ups for you, as neither individual W-2 exceeded the $150,000 threshold.

6. Exceptions for Business Owners and Partners

A significant nuance of Section 603 of the SECURE 2.0 Act is that it specifically targets “wages.” Consequently, individuals with self-employment income, such as partners in a partnership or sole proprietors who do not receive a W-2, are currently exempt from the mandatory Roth catch-up rule. This allows high-earning business owners to continue utilizing pre-tax catch-ups to manage their firm’s taxable income, provided they are not receiving W-2 compensation.

7. The “All or Nothing” Plan Requirement

For a plan to allow any catch-up contributions for high earners, it must offer a Roth feature. If an employer-sponsored plan (such as a 401(k) or 403(b)) does not currently have a Roth option, the plan must either add one or prohibit all catch-up contributions for high earners starting in 2026. At InSight Financial Planners, we work with our clients to review their plan documents during our “Monitor” phase to ensure their retirement vehicles remain compliant and efficient.

8. Coordination with the 60–63 “Super Catch-up”

The SECURE 2.0 Act also introduced an enhanced catch-up limit for participants aged 60 to 63. Starting in 2025, the limit for this “super catch-up” increases to the greater of $10,000 or 150% of the standard catch-up limit. It is important to note that if you fall into this age bracket and meet the income threshold, these larger “super catch-up” amounts will also be subject to the mandatory Roth requirement in 2026.

9. Tax Diversification as a Strategic Advantage

While the loss of a tax deduction may seem disadvantageous in the short term, the InSight-Full® process views this as an opportunity for tax diversification. By building a larger pool of Roth assets, high earners create a hedge against future tax rate increases. This provides greater “fiscal fitness” and flexibility when structuring retirement distributions, allowing for more precise control over taxable income in later years.

10. Proactive Cash Flow and Tax Planning

Because Roth contributions are made with after-tax dollars, your net take-home pay will decrease if you maintain the same catch-up contribution amount. This requires a disciplined review of your cash flow. We emphasize the “Implement” stage of our process to ensure that your monthly cadence of savings is adjusted to account for the increased tax withholding, maintaining stability in your daily financial life.

Summary of Outcomes

Navigating the technicalities of SECURE 2.0 requires a methodical approach and a clear understanding of internal workflows between payroll, plan sponsors, and individual wealth management. By preparing for the 2026 transition now, high earners can ensure:

• Stability: Avoiding sudden decreases in take-home pay through proactive cash flow management.
• Control: Leveraging Roth assets to manage future tax brackets and RMD (Required Minimum Distribution) impact.
• Efficiency: Ensuring catch-up contributions continue without interruption by verifying plan Roth features.

At InSight Financial Planners, our team of CFP® professionals is dedicated to providing the holistic expertise required to navigate these regulatory shifts. We invite you to explore our Market Insights to stay informed on how evolving legislation affects your long-term financial clarity.