
401(k) glossary
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Plan types
Auto-IRA (state-facilitated retirement program)
Short definition
An auto-IRA is a state-run retirement program that requires covered employers without a retirement plan to enroll employees automatically in payroll deduction IRAs. Employees can opt out, and employers do not contribute.
What an auto-IRA is
State law names which employers are covered, usually by employee count and by whether they already sponsor a plan. A covered employer registers, uploads its employee roster and sends payroll deductions to the program. Employees are enrolled at a default rate set by the state, in most programs into a Roth IRA, and can change the rate or opt out. CalSavers in California is one example.
Why it matters to employers
If your state has a mandate, you either register with the state program or offer your own plan and report an exemption. Missing the deadline can bring per-employee penalties in several states. An auto-IRA asks little of the employer, but employees are capped at the IRA limit, you cannot add a match, and high earners may be shut out of Roth IRA contributions.
Example with 2026 figures
A 12-person California company with no plan registers for CalSavers. An employee earning $50,000 who stays at the 5% default rate saves $2,500 in the first year, and the rate rises 1% a year to 8% unless she changes it. In a 401(k) she could defer up to $24,500 in 2026, and you could match part of it.
Common mistakes
Ignoring state notices because you plan to start a 401(k) later. The registration or exemption deadline still applies.
Starting a 401(k) but never reporting the exemption to the state program.
Treating the state program as your plan. You cannot contribute to it or choose its investments.
Sources
CalSavers: Employer registration and exemption (https://employer.calsavers.com/home/help-center/registration.html), retrieved 2026-11-11 CalSavers: Program details for savers (https://saver.calsavers.com/home/savers/program-details.html?language=en), retrieved 2026-11-11 eCFR (National Archives): 29 CFR 2510.3-2: Employee pension benefit plan (https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XXV/subchapter-B/part-2510/section-2510.3-2), 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
General information, not legal or tax advice.

