Almost all companies with a 401(k) now allow Roth savings — here's who benefits

Roth 401(k) availability has risen sharply — about 96% of employer 401(k) plans permitted Roth contributions in 2024 (up from 93% in 2023, 86% in 2020 and ~60% in 2015), while roughly 22% of savers made Roth contributions in 2024. Secure 2.0 accelerated adoption by requiring catch-up contributions for some older high earners to be Roth beginning in 2026 (catch-up Roths apply if an employee earned >$150,000 from their current employer in 2025) and permitting employer Roth matches (19% of plans added or were adding this option, ~33% considering it). The change shifts tax receipts forward — cited alongside CBO/Tax Policy Center debt-to-GDP figures — and may modestly influence plan design, saver tax timing decisions and retirement contribution flows, but is unlikely to be materially market-moving.

Analysis

Market structure: The move to ~96% Roth availability (22% of savers using Roth in 2024) structurally benefits record-keepers and payroll/administration vendors (ADP, PAYX, FIS) and large asset managers (BLK, TROW, SCHW) because plan complexity and after‑tax AUM will increase recurring fees. Expect incremental AUM and fee revenue concentrated in target‑date and after‑tax turnkey products; aggregate AUM upside is likely low‑single digits across big managers over 2–5 years, but margin expansion for platform providers could be outsized near term.

Risk assessment: Tail risks include rapid legislative reversals or IRS/DOL guidance that raises implementation costs, major data/privacy breaches at record‑keepers, or employer resistance to Roth matches; any of these could compress valuations by >20% for providers. Timing: negligible market reaction in days, 3–12 months for plan conversions and product launches, and 2–5 years for meaningful AUM migration. Hidden dependencies include employer willingness to offer Roth matches and saver cash‑flow (tax paid now reduces disposable income), which could blunt contributions.

Trade implications: Direct plays: overweight ADP/PAYX/FIS for SaaS/admin fee capture and BLK/TROW for long‑term AUM capture; underweight consumer discretionary (XLY) for a modest consumption drag among savers paying taxes up front. Options: use limited‑risk call spreads on ADP or BLK (6–12 month expiries) to express adoption upside with defined risk. Entry/exit: initiate positions within 30–90 days, target 12–18 month hold, trim on +20–30% or cut at −10%.

Contrarian angles: The market underestimates concentrated revenue upside from Roth‑driven managed‑account takeup and Roth match administration — a 1–3% re‑rating for best‑in‑class record‑keepers is plausible if adoption accelerates after 2026 catch‑up rules. Conversely, policy or tax reversals remain an underpriced tail; monitor legislative calendar and IRS guidance as a binary catalyst that could reverse gains rapidly.

Key Decisions for Investors

• Establish a 2% long position in ADP within 30 days to capture higher admin/record‑keeping fees; initial stop‑loss −10%, take‑profit +25% over 12–18 months, scale out if adoption metrics (plan conversions citing Roth match services) rise quarter‑over‑quarter.
• Add a 1.5% long split position: BLK (1.0%) and TROW (0.5%) for secular AUM capture; use a 12–36 month horizon, sell or trim if AUM growth vs peers underperforms by >200 bps over two consecutive quarters.
• Implement a pair trade: long ADP (2%) / short XLY (2%) to hedge macro risk and capture structural fee growth vs potential consumer spending drag; target 6–12 month horizon, unwind if XLY outperforms by >15%.
• Buy 6–9 month call spreads on ADP or BLK sized at 0.5–1% of portfolio notional (max premium risk) to lever timing around 2026 Secure 2.0 catch‑up implementation; widen size by up to 50% if DOL/IRS guidance on Roth matches is favorable within the next 60 days.