Governor Gavin Newsom signed SB 947, the No Robo Bosses Act, on 30 September, barring California employers from relying solely on an automated decision system to discipline or fire workers from 1 July 2027.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source When an employer primarily relies on such a system, a human must corroborate the decision with supporting information such as evaluations and personnel files, and the worker gets written notice and can request a description of the data used.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source Newsom vetoed a near identical bill in 2025.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source We assess with high confidence that multistate employers will build their discipline workflows to the California standard rather than run two systems, and with moderate confidence that the law's practical effect will come through documentation burdens rather than enforcement actions.

Why it passed this time

The 2025 veto message objected to unfocused notification requirements and overly broad restrictions on how employers could use automated tools.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source The version Newsom signed answers both. It applies to discipline and termination rather than the full range of employment decisions, and it requires notice at the point of a decision rather than before any use of a system.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source Gig workers were dropped: rideshare drivers, classified as independent contractors under Proposition 22, are not covered, a gap Rideshare Drivers United criticised.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source

The bill arrived in a package. Newsom signed 13 AI bills that day.3 The Next Web 2026-10-02 13 AI bills signed 30 Sep 2026; enforcement by labour commissioner, attorney general and local prosecutors; billed as first such US law; SB 1130 smart glasses bill vetoed. Open source The workplace set includes SB 951, which requires advance notice when AI causes a mass layoff, AB 1883, which bans workplace tools that infer emotional states or collect neural data, AB 1331 on bathroom surveillance, and AB 1979, which keeps AI advisory to licensed clinicians.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source He also vetoed two labour backed bills, AB 2656 on notice to public employees and AB 2575 protecting nurses who override AI recommendations.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source The pattern is a governor choosing which worker protections to sign, not signing everything labour sent him.

What compliance actually requires

The obligations are procedural. An employer that primarily relies on an automated system must have a human corroborate the outcome, must give the affected worker written notice, and must provide a description of the data used on request.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source Enforcement sits with the state labour commissioner, the attorney general and local prosecutors.3 The Next Web 2026-10-02 13 AI bills signed 30 Sep 2026; enforcement by labour commissioner, attorney general and local prosecutors; billed as first such US law; SB 1130 smart glasses bill vetoed. Open source

The hard question is scope. The definition of an automated decision system could reach performance management platforms that flag employees, scheduling and productivity tools, and general purpose AI that managers use informally to draft discipline. An employer that has never thought of its HR software as an algorithm will now need to inventory it. That inventory is where most of the cost lands, and it is a one time cost that scales with the number of tools, not the number of firings.

SB 947 also does not stand alone. California Privacy Protection Agency regulations taking effect on 1 January 2027 already require employers using AI for hiring and other employment or compensation decisions to issue pre use notices, offer an opt out and complete risk assessments.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source An employer will meet the privacy agency's rules six months before the discipline rules arrive, so the inventory work can serve both.

Senator McNerney's office describes the law as the first of its kind in the United States.3 The Next Web 2026-10-02 13 AI bills signed 30 Sep 2026; enforcement by labour commissioner, attorney general and local prosecutors; billed as first such US law; SB 1130 smart glasses bill vetoed. Open source That framing is the author's. Other jurisdictions regulate AI in hiring, and the novelty here is the focus on discipline and termination.

Who gains and who loses

Workers in California gain a right to know when an algorithm drove a disciplinary decision and to see what data it used, which is the precondition for contesting one.2 HR Dive 2026-10-01 Human corroboration with evaluations and personnel files; right to a description of data used; written notice; prior veto cited unfocused notification and overly broad restrictions; CPPA rules effective 1 Jan 2027. Open source Organised labour gains a precedent; Lorena Gonzalez of the California Federation of Labor Unions praised the human oversight approach.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source

Vendors of workforce analytics face a design requirement: products sold into California must produce explanations and data descriptions a human reviewer can use. Employers with fully automated warehouse or call centre discipline face the largest workflow change.

Rideshare and delivery workers gain nothing, since they are outside the law entirely.1 KQED 2026-09-30 Signed 30 Sep 2026; SB 947 effective 1 Jul 2027; prior version vetoed last year; companion bills SB 951, AB 1331, AB 1883, AB 1979; AB 2656 and AB 2575 vetoed; rideshare drivers excluded; labour federation support. Open source The workers most managed by algorithms are the ones the bill excludes.

The counter case

The law could matter much less than the headline suggests. A human corroboration requirement can be satisfied by a manager who reviews the algorithm's output and the same data the algorithm used, which is corroboration in form more than substance. If enforcement is light, employers will add a review step and a notice template and change nothing else. The penalty structure and whether workers can sue directly will decide whether the requirement bites, and the signing coverage did not settle either.3 The Next Web 2026-10-02 13 AI bills signed 30 Sep 2026; enforcement by labour commissioner, attorney general and local prosecutors; billed as first such US law; SB 1130 smart glasses bill vetoed. Open source

What to watch

  • The penalty will turn out modest, and the burden shift is what bites. Our reading of the text: a per violation civil penalty in the hundreds of dollars, enforced by the Labor Commissioner, with no express private right of action. The provision that shifts the burden to the employer is what will drive compliance. Expect law firms to tell clients to inventory every AI tool used in employment decisions within two weeks.

What happened next (updated Oct 13, 2026)

A Morgan Lewis client alert on 9 October answered the penalty question: SB 947 carries a civil penalty of 500 dollars per violation enforced by the Labor Commissioner, does not expressly create a private right of action, and shifts the burden to the employer once use of an automated system is shown.4 Morgan Lewis 2026-10-09 500 dollar civil penalty per violation; no express private right of action; burden shifts to employer once ADS use shown; CBA opt out only with explicit waiver; advice to inventory tools including general purpose ones. Open source The firm advised employers to inventory every AI tool used in employment decisions, including general purpose tools managers use outside formal HR systems.4 Morgan Lewis 2026-10-09 500 dollar civil penalty per violation; no express private right of action; burden shifts to employer once ADS use shown; CBA opt out only with explicit waiver; advice to inventory tools including general purpose ones. Open source