Electrical, plumbing, HVAC, drywall and roofing contractors face the mandate with the least cooperative payroll in the private economy: crews move between employers, hours swing with weather and pipeline, and prevailing-wage jobs add a parallel fringe-benefit obligation. The design that survives it is a 401(k) with hour-based eligibility, immediate or short vesting where crews churn, and — on public works — prevailing-wage fringe contributions directed into the plan rather than paid as cash wages, which may reduce payroll-tax burden while satisfying the fringe obligation. The owner-limits trap decides the rest: the highest earner in the company usually cannot use CalSavers at all.
Why this industry is different
The mandate treats every employer alike. The payroll realities underneath don't cooperate:
- Cash flow swings with the job pipeline — committing to a fixed match feels reckless when the next quarter depends on two bids.
- Crews move between employers and seasons — weather cycles and project endings mean the roster in March and the roster in September barely overlap.
- 1099 versus W-2 classification confusion is endemic, and California's tests are unforgiving — the mandate counts the W-2s you should have, not just the ones you have.
- Prevailing-wage and union work creates parallel benefit obligations — certified payroll, fringe rates, and sometimes a multiemployer plan running alongside whatever the shop does.
- The owner is usually the highest earner with nothing diversified — net worth in equipment and receivables, no retirement asset, and locked out of CalSavers by the Roth income limits.
What actually works
Two design moves do most of the work. First, eligibility and vesting tuned to crew reality: a 1,000-hour eligibility year keeps short-stint labor out of the census, while the contribution sources that matter to a mobile workforce vest quickly enough that the plan reads as real money, not a promise. Second, on prevailing-wage jobs, the fringe portion of the wage determination may be contributed to a qualified plan instead of paid as additional cash wages — satisfying the fringe obligation while keeping those dollars off the base for certain payroll-driven costs. The mechanics are exacting (annualisation rules, certified payroll reporting) and worth doing precisely.
For the owner, a safe harbor feature secures the full $24,500 deferral for 2026 regardless of what the crew defers — the direct fix for the owner-limits trap — and profit sharing stays discretionary so a thin year costs nothing beyond the safe harbor.
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.
On classification. Nothing on this page makes a 1099 crew defensible. California's ABC test is strict, the penalties are severe, and the retirement mandate simply inherits whatever your true W-2 roster is. If classification is uncertain, resolve that with employment counsel before designing anything.
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
Specialty Trade Contractors questions
How does a 401(k) interact with prevailing wage jobs?
On California public works you owe the published wage plus a fringe amount. Fringe dollars contributed to a bona fide benefit plan — including a qualified retirement plan — can count toward that obligation instead of being paid as cash wages, subject to annualisation and documentation rules. Because plan contributions are not wages, this may also change what certain payroll-based costs are computed on. The rules are technical; set it up with people who do certified payroll for a living.
Half my guys won't be here next year. Why enroll them at all?
Under CalSavers you must facilitate enrollment for every W-2 employee regardless of tenure. Under a private plan, eligibility design does the filtering: a worker who never crosses your service requirement never enters. That difference — who you must administer — is often the strongest argument for a private plan in the trades.
My crews are 1099. Does the mandate even apply to me?
If they are genuinely independent contractors, they do not count. But California applies the ABC test, and a crew working your jobs, your hours, with your materials rarely passes it. Misclassification exposure dwarfs anything in this article — get the classification question answered by employment counsel first, then the plan question becomes easy.
Some of my work is union with trust fund contributions. Do those employees need CalSavers too?
Employees covered by a collective bargaining agreement with a multiemployer plan are generally already covered for mandate purposes, but your non-union office and shop staff are not covered by the trust fund. Mixed shops usually need an answer for the non-union side specifically.
A plan designed around specialty trade contractors — 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.