Prediction Markets
in Hawaii
Hawaii is the most anti-gambling state in the United States: no casinos, no state lottery, no sports betting, and one of the broadest anti-gambling statutes anywhere. Combined with the highest state income tax rate in the US at up to 11%, Hawaii is the most challenging state for prediction market trading on both legal and tax dimensions. Platforms are technically accessible, but Hawaii's extreme gambling hostility creates meaningful legal uncertainty that CFTC preemption arguments may not fully resolve.
Which platforms work in Hawaii?
Kalshi operates under CFTC federal preemption in Hawaii. No state enforcement action against Kalshi as of May 2026.
Polymarket QCEX is available in Hawaii. No enforcement action taken against Polymarket in Hawaii.
Manifold available in Hawaii. Play-money Mana and Sweepcash features accessible.
CFTC no-action letter. US politics only, $850 cap. Available in HI.
Robinhood prediction market contracts available in HI.
Caution note: While no platform has been blocked in Hawaii to date, the state's gambling statutes are among the broadest in the US. Hawaii Revised Statutes §712-1220 prohibits "advancing gambling activity." Whether CFTC preemption fully shields prediction market users from state prosecution is untested in Hawaii. Consult legal counsel for significant trading activity.
11% top rate — highest in the US
Hawaii has the highest state income tax rate in the US at 11% on income above $200,000 (single). Even in lower brackets (8.25–9%), Hawaii prediction market traders face combined marginal rates of 30–48% on profits. On $10,000 net profit in the 9% Hawaii bracket + 22% federal = $3,100 tax, keeping only $6,900.
Hawaii has 12 income tax brackets ranging from 1.4% to 11%. Most prediction market traders earning meaningful profits would fall in the 6.4–9% range. Combined with federal rates, the effective take-home on prediction market profits is lower in Hawaii than in any other US state.
Hawaii vs the most tax-favorable states
Alaska
Also a Pacific state: no income tax, open status, no sports betting either. Complete opposite of Hawaii's tax burden.
No income taxWyoming
No income tax, open status, sports betting legal. The maximum contrast with Hawaii on every dimension.
High taxMinnesota
9.85% top rate: the only other state close to Hawaii's 11%. Open status but also a high-tax burden for active traders.