
401(k) glossary
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Plan types
Roth IRA
Short definition
A Roth IRA is an individual retirement account funded with after-tax dollars, so qualified withdrawals are tax-free. In 2026 the limit is $7,500, or $8,600 at age 50 or older, and eligibility phases out at higher incomes. For 2027 the contribution limit stays $7,500 ($8,600 at 50 or older), and the income phase-out rises to $158,000 to $173,000 for single filers and $250,000 to $260,000 for joint filers.
What a Roth IRA is
A Roth IRA is an account a person opens with a bank, a brokerage or a state program. It is separate from any employer plan. Contributions are not deductible. Earnings come out tax-free once the owner is 59½ and the account has been open for five years, and the original owner never has to take required minimum distributions.
Why it matters to employers
Most state auto-IRA programs, such as CalSavers, put employees into Roth IRAs by default. If you are weighing a state program against a 401(k), the Roth IRA rules set the ceiling on what your employees can save there: $7,500 in 2026 against $24,500 in a 401(k), with no employer match. Higher earners may not be allowed to contribute at all.
For 2027 the contribution limit stays $7,500 ($8,600 at 50 or older), and the income phase-out rises to $158,000 to $173,000 for single filers and $250,000 to $260,000 for joint filers. (IRS Notice 2026-66)
Example with 2026 figures
In 2026 a single employee can contribute the full $7,500 with modified adjusted gross income under $153,000. The allowed amount shrinks between $153,000 and $168,000 and is zero above that. For married couples filing jointly the range is $242,000 to $252,000. The limit is shared across all of a person’s traditional and Roth IRAs.
Common mistakes
Confusing a Roth IRA with a Roth 401(k). A Roth 401(k) has no income limit and uses the higher 401(k) deferral limit.
Assuming IRA contributions count against the 401(k) limit. The two limits are separate.
Contributing above the income limit. Excess contributions are charged a 6% excise tax each year until they are removed.
Sources
Internal Revenue Service: Roth IRAs (https://www.irs.gov/retirement-plans/roth-iras), retrieved 2026-11-11 Internal Revenue Service: Retirement topics: IRA contribution limits (https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-limits), retrieved 2026-11-11 Internal Revenue Service: Notice 2025-67: 2026 amounts relating to retirement plans and IRAs (https://www.irs.gov/pub/irs-drop/n-25-67.pdf), retrieved 2026-11-11 Internal Revenue Service: 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500 (IR-2025-111) (https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500), retrieved 2026-11-11 Internal Revenue Service: Notice 2026-66: 2027 amounts relating to retirement plans and IRAs (https://www.irs.gov/pub/irs-drop/n-26-66.pdf), retrieved 2026-11-13
General information, not legal or tax advice.

