Ballot measure · California · November 3, 2026

Proposition 42

Title as the state lists it: Prohibits New State Personal Property Taxes and Certain Retroactive State Taxes. Initiative Constitutional Amendment.1,2,3,4

Research draftCitizen initiativeConstitutional amendment
How it got there
Citizen initiative
Kind of measure
Constitutional amendment
To pass
A majority of the votes on it
Researched
October 27, 2026

Research draft. We gathered this from official sources on October 27, 2026: election offices, state laws and court records, each linked to its source. Separate reviewers checked a random sample of 48 facts from the ballot-measure research against the cited sources and found no errors. The rest hasn't been reviewed fact by fact yet, so check the linked source before relying on anything here.

§1What your vote means

Drafted by AI from the public sources cited. Each sentence links to its source.

A yes vote

A yes vote would amend the state constitution to bar new state taxes, enacted or taking effect on or after January 1, 2026, on owning personal property such as financial assets, business interests and retirement accounts, and to bar new state taxes that apply based on conduct or status from before the tax took effect.3,4

A no vote

A no vote would mean the Legislature or voters could still adopt new state taxes on owning personal property or new taxes that reach back to earlier conduct or status, under the same rules that apply to other taxes today.3,4

More about it

The measure says other measures approved on the same ballot are void where they conflict with it, if it receives more yes votes; the Legislative Analyst says this could keep Proposition 40 from taking effect.3,5 Where in the source: p. 63, Potential Interactions With Other Propositions

§2How it got on the ballot

Citizen initiative. Voters proposed it by signing a petition.1,2,3,4

Constitutional amendment. It would change the state constitution.1,2,3,4

It is on California's list of statewide measures for November 3, 2026.1,2,5 One of these official sources itself calls the list certified or final. What we couldn't confirm about the list is in the notes on California's measures.

§3What it needs to pass

Drafted by AI from the public sources cited. Each sentence links to its source.

A majority of the votes on it. An initiative passes if more voters vote yes than no on it.6,7 Where in the source: Initiative Guide ch. IV, p. 17 (PDF p. 22), citing Cal. Const. art. II, § 10(a)