What Is a Designated Roth Account? Roth 401(k) IRC §402A Explained 2026

A designated Roth account is the separately tracked Roth portion of a 401(k), 403(b) or governmental 457(b) plan. It is governed by IRC §402A, originally added by the Economic Growth and Tax Relief Reconciliation Act of 2001 for contributions beginning in 2006—not created by the Pension Protection Act of 2006. A Roth IRA is governed by §408A and has different contribution and withdrawal rules. Employer Roth SEP and SIMPLE IRA arrangements are also distinct from §402A designated Roth accounts.

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Quick Facts

infoIRC §402A is the governing section. Distinct from §408A (Roth IRAs).
infoCovers Roth 401(k), Roth 403(b), and governmental Roth 457(b). Qualified distributions are tax-free, but early-distribution rules can differ by plan type.
check_circle2026 employee deferral limit: $24,500, shared by pretax and Roth deferrals. If the plan permits, the ordinary age-50 catch-up is $8,000 (total $32,500); for participants attaining ages 60–63 during 2026, it is $11,250 instead (total $35,750). Special 403(b) and 457(b) catch-up rules can also matter.
infoNo Roth IRA-style MAGI phase-out. Participation still depends on plan eligibility, compensation and applicable deferral limits.
check_circleNo owner lifetime RMDs as of 2024 per SECURE 2.0 §325. Beneficiary distribution rules still apply.

Roth IRA vs. Designated Roth Account: The Differences

Both have the same Roth tax treatment (after-tax in, tax-free qualified withdrawals out), but the rules diverge:

Contribution limits. The 2026 IRA cap is $7,500, or $8,600 at age 50+, shared across regular Traditional and Roth IRA contributions and limited by eligible compensation. The ordinary Roth 401(k) employee limits are $24,500 / $32,500 at age 50+ / $35,750 at ages 60–63, shared with pretax deferrals and subject to plan terms.
Income limits. For 2026, Roth IRA phase-outs are $153,000–$168,000 for Single/HoH and $242,000–$252,000 for MFJ. MFS filers who lived with a spouse during the year generally use $0–$10,000; those who lived apart all year use the Single range. Designated Roth deferrals have no comparable MAGI phase-out.
Investment options. Roth IRA choices depend on the custodian and tax rules. Collectibles restrictions are not the only limit: life insurance is prohibited and prohibited-transaction rules also apply. Designated Roth investments depend on the plan's available options.
Withdrawals. Roth IRA regular contribution basis comes out first without income tax or the additional early-distribution tax. Designated Roth withdrawals require a permitted distribution event and compliance with plan terms; a nonqualified payment generally includes proportional basis and earnings. Its earnings are taxable, and an early-distribution tax may apply unless an exception fits. Governmental 457(b) distributions generally avoid that additional tax, except amounts attributable to rollovers from other plan types or IRAs. There is no general workplace-Roth “contributions first” rule.
Qualified distributions. A designated Roth distribution is qualified after the applicable five-tax-year period and on or after age 59½, death or disability. A properly completed eligible rollover has separate rules; a Roth IRA also has its own qualification clock.
Employer contributions. A plan may offer matching or nonelective contributions; a match is not guaranteed. If the plan offers a Roth employer-contribution election under SECURE 2.0 §604, it must be made timely and irrevocably for the contribution, the participant must be fully vested in that type of contribution when allocated, and the amount is included in income for the allocation year. Otherwise, employer contributions generally remain pretax.
Required minimum distributions. Roth IRA owners have no lifetime RMDs under §408A(c)(4); designated Roth owners have none beginning in 2024 under SECURE 2.0 §325. After death, the 10-year rule generally applies to designated beneficiaries who are not eligible designated beneficiaries. Eligible designated beneficiaries can have life-expectancy options; an estate or other non-designated beneficiary of a Roth account generally faces a five-year rule. Plan terms may require faster payment.

How to Tell If Your Plan Has a Designated Roth Option

Not all employer plans offer a Roth feature. Check the Summary Plan Description and election materials, or ask the administrator. Where both are offered, you can generally split employee deferrals between pretax and Roth, but doing so does not double the shared contribution limit.

For 2026, the statutory Roth catch-up requirement applies to §414(v) catch-ups when the participant's 2025 FICA wages from the sponsoring employer exceeded $150,000. It does not make ordinary deferrals Roth-only. Notice 2023-62 provided transition relief for 2024–2025. TD 10033, published September 16, 2025, is the final catch-up regulation; its detailed rules generally apply beginning in 2027, with special governmental and collectively bargained plan provisions. Before the applicable regulatory date, reasonable, good-faith statutory implementation applies.

The regulations permit specified related-employer/common-paymaster wage aggregation if the plan provides for it; aggregation is not automatically across all employers. A plan is not required to add a Roth feature. Without one, affected participants cannot make these catch-ups. See the Roth 401(k) guide for the detailed rule and dates.

Strategic Use Alongside a Roth IRA

You may use a designated Roth account and a Roth IRA in the same year if you meet each arrangement's rules. Workplace participation does not itself disqualify a Roth IRA contribution, but the IRA compensation, MAGI and shared Traditional/Roth contribution limits still apply.

Employer matching terms, vesting, fees, investment choices, tax rates and access needs affect which account to prioritize. A “match first, then IRA, then more workplace saving” sequence is one possible approach, not a rule that is optimal for everyone.

A designated Roth account is a common direct Roth-saving option for people above the regular Roth IRA income limit, not the only type of employer Roth arrangement: Roth SEP and SIMPLE IRA options also exist under separate rules. A nondeductible IRA contribution followed by a Roth conversion may be possible, but the pro-rata tax rule and reporting requirements must be considered.

Primary sources: Notice 2006-44, §II (statutory origin); Notice 2025-67 (2026 limits); TD 9324 (qualification and rollover rules); Notice 2024-2, §§II.K–L (Roth SEP/SIMPLE and employer contributions); TD 10001 (beneficiary rules); IRS investment FAQs.

Frequently Asked Questions

Is a designated Roth account the same as a Roth 401(k)?

Yes — designated Roth account is the IRS's formal name; Roth 401(k) is the common term most people use for the same thing in a 401(k) plan. The IRC §402A term covers Roth 401(k), Roth 403(b), and governmental Roth 457(b) under one umbrella.

Can I roll a designated Roth account to a Roth IRA?

An eligible distribution can generally be rolled to a Roth IRA without current income tax if the rollover requirements are met; a direct rollover avoids many 60-day-rollover complications. Not every distribution is eligible. The Roth IRA's own five-tax-year qualification clock applies—workplace Roth years do not carry over to start it earlier. Under §1.408A-10, Q&A-3, a qualified designated Roth distribution rolled over becomes Roth IRA basis; for a nonqualified distribution, only the investment-in-the-contract portion becomes basis, not the earnings.

Does a designated Roth account have RMDs?

Not for the owner during life beginning in 2024, under SECURE 2.0 §325. Beneficiary distributions still apply. The 10-year rule generally covers designated beneficiaries who are not eligible designated beneficiaries, not every non-spouse beneficiary. Eligible designated beneficiaries and non-designated beneficiaries have different rules, and a plan may require faster distribution.

Are designated Roth contributions tax-deductible?

No. Designated Roth employee deferrals are included in current taxable wages; qualified withdrawals are tax-free. Pretax 401(k) employee deferrals are generally excluded from current federal income-tax wages—not claimed as a separate itemized deduction—and are generally taxable when distributed.