The ownership-income distinction
Proposition 42 would prohibit new state taxes imposed simply for owning financial assets or other personal property. The Legislative Analyst notes that California currently taxes income generated by financial assets but does not tax ownership of those assets itself.
The proposal therefore would not erase existing income taxes on dividends, capital gains or wages. Campaign language about savings can blur those categories; the official analysis keeps them separate.
The measure reaches beyond stocks
Personal property means things people own other than real estate. Current examples include the vehicle license fee and local property taxes on some business equipment. Proposition 42 would constrain new state ownership taxes; it does not announce refunds of current vehicle fees or county business-property bills.
It would also limit when the Legislature or voters could raise a tax retroactively, meaning a tax applied to past activity. The exact boundary would matter in future legislation and potential litigation.
Why the fiscal estimate has no number
The analyst says future revenue could be lower because the state would lose tax options, but when and by how much is unclear. There is no scheduled annual cost in the analysis because the amendment acts as a prohibition on hypothetical future taxes.
Proposition 42 may conflict with Proposition 40's one-time wealth tax. If both pass, the official guide says a court could give effect to the one receiving more yes votes where they conflict. That is a legal possibility, not a pre-election judgment about which measure will prevail.
Sources and further reading
Secretary of State: Proposition 42 summary ↗