The Roth Tipping Point: Why 86% of Companies Just Changed the Tax Game

The single biggest design shift inside the American 401(k) this decade is about taxes, more than fees, target-date funds, or auto-escalation. According to Vanguard’s 2025 How America Saves report, 86% of plans now offer a Roth contribution option, up from 74% in 2020. Among participants whose plans offered it, 18% elected the Roth option in 2024, an all-time high, up from 12% in 2019. The traditional pre-tax 401(k) is no longer the only default, and federal law is now actively pushing even more employers in the same direction.

What “Rothification” Actually Means

A traditional 401(k) lets workers defer income taxes today and pay them in retirement once withdrawals begin. A Roth 401(k) flips that arrangement: contributions are made with after-tax dollars, and qualified withdrawals, including all investment growth, come out completely tax-free. The core trade-off is concrete. Workers pay a known tax rate now rather than an unknown future rate later.

Vanguard’s data capture how quickly that calculus has shifted. Among participants in larger plans, 96% are now offered Roth as a feature, making it close to universal for workers at mid-size and large employers. The six-percentage-point jump in adoption, from 12% of eligible participants in 2019 to 18% in 2024, reflects both broader access and a growing awareness of where future tax rates might be headed. Beyond regular contributions, 36% of plans now also offer Roth in-plan conversions, which allow workers to shift existing pre-tax balances into a Roth account within the same plan, and 10% of plans make that conversion automatic.

Why the Tax Calculus Is Changing Now

Vanguard’s How America Saves 2026 report, the 25th edition of the series covering nearly 5 million workers, offers a bracing update on household financial health. Hardship withdrawals hit 6% of participants in 2025, up from 5% in 2024 and the highest rate ever recorded by the firm. It marks the sixth straight annual increase, a streak that underscores how many households are treating their retirement accounts as a financial backstop of last resort.

Savings behavior at the plan level, however, moved in the opposite direction. Participants contributed an average of 7.6% of their paychecks in 2025, and 45% of savers raised their deferral rate during the year, either voluntarily or through automatic escalation. When employer contributions are included, Vanguard reports that matching contributions reached a record 4.7% of pay. Total combined contribution rates are pushing more workers toward Vanguard’s own recommended 12% to 15% savings target. For workers already stretching their budgets in both directions, the tax treatment of every dollar they set aside becomes a sharper question than ever.

The regulatory backdrop is adding urgency. Under the SECURE 2.0 Act, beginning January 1, 2026, participants aged 50 and older who earned more than $150,000 in FICA wages from their employer in the prior year must make all catch-up contributions on a Roth basis. The IRS issued final regulations implementing this rule in September 2025; those regulations are formally effective in 2027, but plans are expected to operate in good-faith compliance throughout 2026. For plans that do not currently offer a Roth feature, the rule creates a hard choice: add Roth or lose the ability to accept catch-up contributions from higher-earning employees entirely. That compliance pressure is expected to push Roth availability even higher across the industry.

A related SECURE 2.0 provision adds another layer. Workers ages 60 to 63 may now contribute up to $11,250 in “super catch-up” contributions in 2026 rather than the standard $8,000 available to those 50 and older. This provision, combined with the $24,500 base limit, means some workers in that age window can set aside as much as $35,750 in a single year. For those who also clear the $150,000 FICA wage threshold, those super catch-up dollars must go into a Roth account.

Plan Design Did Most of the Work

The broader Roth shift happened largely because plan sponsors changed the menu. The 86% availability figure is up from 74% five years ago, and among plans with at least 5,000 participants, 95% now offer the feature. Automatic enrollment amplified the effect. Now in place at 61% of plans (up from just 10% in 2006), auto-enrollment drives participation rates to 94% in the plans that use it, compared to 64% for voluntary-enrollment plans. When Roth appears as an active contribution option inside a high-participation environment, more workers encounter it as a genuine choice rather than a buried item in an enrollment menu.

Who Tends to Choose Roth

The 18% of participants who elected Roth in 2024 skewed younger and higher-income, according to Vanguard’s demographic breakdown. Vanguard’s 2026 report adds a sharper picture: Roth adoption ran at 20% for the 25-to-34 age group and 19% for the 35-to-44 group, the two highest rates of any age band. The pattern is consistent with workers who expect their current tax bracket to be lower than their eventual retirement bracket, or who want tax diversification across account types regardless of future rate predictions. That flexibility, holding both pre-tax and Roth balances simultaneously, gives retirees more control over which dollars to draw first and how much ordinary income they report in any given year.

Higher earners also lean toward Roth. In the $100,000 to $149,999 income bracket, 24% of participants elected the option; 21% of those earning $150,000 or more did the same. The combination of younger workers prioritizing long tax-free compounding windows and higher earners preparing for the new mandatory Roth catch-up rule suggests adoption rates will keep climbing.

What to Watch Next

• The SECURE 2.0 mandatory Roth catch-up rule is now in effect for 2026. Plan sponsors that have not yet added a Roth feature risk losing catch-up eligibility for higher-earning employees, with full regulatory enforcement arriving in 2027.

• Workers ages 60 to 63 can take advantage of the “super catch-up” contribution limit of $11,250 in 2026, up from the standard $8,000, if their plan has adopted the provision.

• Many plans allow a split between traditional and Roth contributions, letting participants hedge the tax-rate question without committing entirely to one treatment.

• Hardship withdrawals now represent 6% of Vanguard participants, a record high and a signal that retirement accounts are doubling as emergency funds for a growing share of American households.

Editor’s note: This article has been updated with figures from Vanguard’s How America Saves 2026 report, including a rise in hardship withdrawals to a record 6% of participants in 2025 (up from 5% in 2024) and a record employer match of 4.7%, as well as the IRS’s September 2025 final regulations on the SECURE 2.0 Roth catch-up rule, Roth adoption rates by age band (20% for ages 25-34, 19% for ages 35-44), and the 2026 “super catch-up” limit of $11,250 for workers ages 60 to 63.

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