If you're a high earner approaching retirement age, January 2026 has brought a significant change to your 401(k) strategy. Under the SECURE 2.0 Act, workers who earned more than $150,000 in 2025 are now required to make their catch-up contributions to a Roth account rather than a traditional pre-tax 401(k). This mandatory shift affects millions of Americans and requires careful planning to optimize your retirement savings.

The New Rules Explained

Here's what changed on January 1, 2026:

The Income Threshold

If you earned $150,000 or more in FICA wages in 2025, you're now limited to Roth contributions for your catch-up amounts in 2026. This applies to 401(k), 403(b), governmental 457 plans, and the federal Thrift Savings Plan.

What Are Catch-Up Contributions?

Workers aged 50 and over can contribute beyond the standard limit. For 2026:

  • Standard 401(k) limit: $24,500 (up from $23,500 in 2025)
  • Catch-up contribution (ages 50+): $8,000 (up from $7,500)
  • Super catch-up (ages 60-63): $11,250
  • Maximum total (ages 50-59, 64+): $32,500
  • Maximum total (ages 60-63): $35,750

The Roth Requirement

Previously, high earners could choose whether to make catch-up contributions on a pre-tax or Roth basis. Now, if you exceeded the $150,000 threshold, you have no choice—your catch-up contributions must go to a Roth account.

"If you earned $150,000 or more in 2025, you'll be limited to a Roth 401(k) in 2026 if you want to make catch-up contributions. That could be a problem if your workplace 401(k) doesn't have a Roth option."

— The Motley Fool analysis

Why This Matters

The Tax Trade-Off

Traditional (pre-tax) contributions reduce your taxable income today but are taxed upon withdrawal in retirement. Roth contributions provide no immediate tax break but grow tax-free and can be withdrawn tax-free in retirement.

For high earners in their peak earning years, losing the ability to reduce current taxable income may feel like a penalty. However, there's a silver lining: if you expect to be in a similar or higher tax bracket in retirement, or if you believe tax rates will rise generally, Roth contributions may actually be more valuable.

The Employer Match Question

Note that only your catch-up contributions are affected. Your regular contributions (up to $24,500) can still be made pre-tax, and any employer match continues to go into the traditional 401(k) bucket regardless of your income.

What If Your Plan Doesn't Offer Roth?

Here's the catch: not all 401(k) plans offer a Roth option. If your employer's plan doesn't include Roth 401(k) contributions and you earned over $150,000, you may be unable to make catch-up contributions at all until the plan is amended.

The IRS has indicated it will provide transition relief, and most large employers have scrambled to add Roth options. However, smaller employers may still be updating their plans. Check with your HR department or plan administrator to confirm your plan's Roth availability.

Strategic Responses for High Earners

Embrace the Roth

Rather than viewing the mandatory Roth as a penalty, consider it forced tax diversification. Having both pre-tax and Roth assets in retirement provides flexibility to manage your tax bracket and potentially reduce lifetime taxes.

Maximize Other Pre-Tax Savings

If reducing current taxable income is a priority, look beyond the 401(k):

  • HSA contributions: $4,400 for individuals, $8,750 for families in 2026, with an extra $1,000 catch-up for those 55+
  • Traditional IRA: $7,500 limit in 2026 ($8,600 with catch-up), though deductibility phases out at higher incomes
  • Deferred compensation plans: Some employers offer 457(b) or other deferred comp plans with no income limits

Consider Roth Conversions

If you're being pushed toward Roth contributions anyway, it may make sense to evaluate a broader Roth conversion strategy. Converting traditional IRA or 401(k) assets to Roth during years of lower income (perhaps early retirement) can reduce future required minimum distributions and create tax-free income for later years.

IRA Rules Unchanged

It's important to note that IRA catch-up contributions are not affected by this new rule. You can still make pre-tax contributions to a traditional IRA (subject to income limits for deductibility) regardless of your earnings.

For 2026, the IRA contribution limit is $7,500, with a $1,100 catch-up for those 50 and over, for a total of $8,600.

The Bottom Line

The mandatory Roth catch-up rule represents a meaningful shift in retirement planning for high earners. While it removes a tax planning option, it also encourages building tax-diversified retirement assets—a strategy that financial planners have long recommended.

If you're affected, work with your HR department to confirm your plan offers Roth options, and consider consulting a tax professional to optimize your overall retirement savings strategy. The rules may have changed, but the goal remains the same: building sufficient assets to fund a comfortable retirement.