For CalSavers, the employer of record is the employer — and a staffing agency is the employer of record for its temporary and assignment workers, not the client sites where they work. That means your eligible headcount is the full field payroll, often ten or twenty times the internal staff, and the mandate has applied to you at every deadline that has now passed. Churn does not excuse the roster: workers must be added within 30 days of hire. Agencies weighing a 401(k) instead face the industry's hardest eligibility questions — including the long-term part-time rules, which now sweep in field employees with two consecutive 500-hour years — so plan design here is genuinely an engineering problem, and it is solvable.
Why this industry is different
The mandate treats every employer alike. The payroll realities underneath don't cooperate:
- The field payroll is enormous and never stops moving. Hundreds of W-2 assignment workers starting and ending weekly means the CalSavers roster — or a plan's eligibility tracking — is a live data feed, not an annual chore.
- Thin markups leave no room for benefit costs. Light-industrial staffing margins are set by competitive bid; an employer contribution across the whole field population is arithmetic that doesn't close, which is why design has to distinguish the populations honestly and lawfully.
- The long-term part-time rules bite hardest here. Federal law now requires 401(k) deferral eligibility for employees with consecutive 500-hour years — a threshold a steady temp crosses easily — so the old assumption that field staff simply never enter the plan no longer holds.
- Joint-employer anxiety freezes decisions. Owners worried about co-employment exposure with client sites hesitate to touch anything benefits-shaped; meanwhile the CalSavers notices keep coming, addressed correctly, to the agency.
- Big W-2 counts trigger big-plan obligations by surprise. An agency that sponsors a plan and lets eligibility drift can cross audit and testing thresholds it never budgeted for.
What actually works
Staffing is where plan design is closest to engineering. The internal staff and the field staff are different populations with different economics, and a well-built plan treats them that way within what the law allows: eligibility service requirements measured in hours, entry dates that don't create mid-assignment enrollments, and careful tracking for the long-term part-time rules — because a temp with two consecutive 500-hour years now has a statutory right to defer, whatever the plan's ordinary eligibility says. Coverage testing has to be modeled before the design is adopted, not discovered at year-end; excluding the field population by classification is possible in some structures and fatal in others.
For many agencies the stable answer is a hybrid: CalSavers as the compliant vehicle for the high-churn field payroll is not an option once you sponsor a plan — the mandate is employer-level, not employee-level — so the real choice is between CalSavers for the whole roster, or one plan engineered to hold both populations. Which side of that line an agency should stand on depends on markup, tenure mix and the owners' own savings goals, and it's precisely the kind of question a fee-only fiduciary should walk through with you before any document gets signed.
The SECURE 2.0 credits frequently cover most of the first three years' administration for employers under 50 staff — the formula, worked honestly — and if after the arithmetic CalSavers is still the right answer for your shop, we'll say so: the full comparison · run your own numbers.
By county
This guide is statewide. The county pages go local — where the industry physically clusters, which cities it sits in, and the municipal rules that stack on top of the state mandate.
Where this industry clusters near us
Staffing Agencies questions
Are my temps MY employees for CalSavers, or the client's?
Our field staff turn over constantly. Do we really have to enroll people who'll be gone in six weeks?
What are the long-term part-time rules and why do they matter to us?
Would sponsoring a plan increase our joint-employer exposure with clients?
A plan designed around staffing agencies — not around the average employer
We design around the census you actually have — turnover, seasonality, pay structure and all. Fifteen minutes, no charge, and a straight answer.