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Elections·Referendum

California Retroactive Tax Prohibition Proposition

icon for California Retroactive Tax Prohibition Proposition
Elections·Referendum

California Retroactive Tax Prohibition Proposition

Nov 3

Nov 3

Nov 3

Nov 3

Nov 3

Nov 3

Nov 3

Nov 3

50% chance
Polymarket
NEW
50% chance
Polymarket
NEW
Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40. This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.” If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”. This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).California voters face a closely contested November 2026 ballot measure that would bar new state taxes on personal property such as retirement accounts and investment holdings while limiting retroactive taxation based on pre-enactment status or conduct. The proposition emerged as a direct counter to the competing 2026 Billionaire Tax Act, with both measures designed so that the higher-vote initiative prevails if approved; this linkage has driven balanced trader positioning. Recent developments include substantial early fundraising by business-backed opposition groups, federal legislation targeting retroactive state taxes on former residents, and ongoing legal debate over the constitutionality of residency-based retroactivity in wealth-tax proposals. Upcoming campaign developments, voter mobilization around property protections, and any shifts in polling on the paired wealth-tax initiative could alter the narrow balance ahead of election day.

Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40.

This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.”

If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”.

This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).
Volume
$0
End Date
Nov 3, 2026
Market Opened
Jul 1, 2026, 6:25 PM ET

Resolver

0x65070BE91...
Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40. This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.” If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”. This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).
Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40. This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.” If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”. This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).California voters face a closely contested November 2026 ballot measure that would bar new state taxes on personal property such as retirement accounts and investment holdings while limiting retroactive taxation based on pre-enactment status or conduct. The proposition emerged as a direct counter to the competing 2026 Billionaire Tax Act, with both measures designed so that the higher-vote initiative prevails if approved; this linkage has driven balanced trader positioning. Recent developments include substantial early fundraising by business-backed opposition groups, federal legislation targeting retroactive state taxes on former residents, and ongoing legal debate over the constitutionality of residency-based retroactivity in wealth-tax proposals. Upcoming campaign developments, voter mobilization around property protections, and any shifts in polling on the paired wealth-tax initiative could alter the narrow balance ahead of election day.

Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40.

This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.”

If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”.

This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).
Volume
$0
End Date
Nov 3, 2026
Market Opened
Jul 1, 2026, 6:25 PM ET

Resolver

0x65070BE91...
Proposition 42 is a California ballot measure currently scheduled for voting on November 3, 2026. It would prevent retroactive taxes and new taxes on personal property, which would offset the proposed wealth tax in Proposition 40. This market will resolve to “Yes” if the specified ballot measure is approved by a majority of voters at the California statewide general election currently scheduled for November 3, 2026. Otherwise, this market will resolve to “No.” If voting on the specified ballot measure does not occur, or the results thereof are not known definitively, by March 31, 2027, this market will resolve to “No”. This market will resolve based on a consensus of credible reporting. If there is ambiguity, this market will resolve solely based on official information from the State of California, including the California Secretary of State (https://www.sos.ca.gov/).

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Frequently Asked Questions

"California Retroactive Tax Prohibition Proposition" is a prediction market on Polymarket where traders buy and sell "Yes" or "No" shares based on whether they believe this event will happen. The current crowd-sourced probability is 50% for "Yes." For example, if "Yes" is priced at 50¢, the market collectively assigns a 50% chance that this event will occur. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"California Retroactive Tax Prohibition Proposition" is a newly created market on Polymarket, launched on Jul 1, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "California Retroactive Tax Prohibition Proposition," simply choose whether you believe the answer is "Yes" or "No." Each side has a current price that reflects the market's implied probability. Enter your amount and click "Trade." If you buy "Yes" shares and the outcome resolves as "Yes," each share pays out $1. If it resolves as "No," your "Yes" shares pay $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current probability for "California Retroactive Tax Prohibition Proposition" is 50% for "Yes." This means the Polymarket crowd currently believes there is a 50% chance that this event will occur. These odds update in real-time based on actual trades, providing a continuously updated signal of what the market expects to happen.

The resolution rules for "California Retroactive Tax Prohibition Proposition" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.