Kalshi taxes in California
If you trade Kalshi from California, your gains face tax on two fronts: the federal government, and California itself. This page covers how California treats prediction-market profit, the rate to expect, and how to estimate the combined bill.
It is educational, not tax advice. The federal classification of event contracts is genuinely unsettled, and your California rate depends on your specific income, so treat the numbers here as estimates and confirm with a professional.
Do you owe California tax on your Kalshi gains?
Yes, on two levels. Your Kalshi trading profit is taxable federally no matter where you live, and California also taxes that income at the state level. So a winning year on Kalshi means both a federal bill and a California bill on the same gains.
California applies a top marginal rate of about 13.3% to individual income, and prediction-market gains are generally swept in as ordinary income. There is no separate, lower state rate for trading profit the way the federal side has for long-term capital gains.
How California treats prediction-market gains
Most states, California included, tax the full gain as ordinary income and do not recognize the federal Section 1256 60/40 split. That means the contested federal classification question does not change your California number: the state taxes your net gain either way.
California uses graduated brackets, and the 13.3% figure is the top marginal rate, used here as a conservative estimate. Your effective state rate depends on your total income, deductions, and filing status.
Estimating your California bill
As a rough illustration, on a $5,000 net Kalshi profit, a 13.3% California rate is about $665 in state tax, before anything you owe the IRS. Your real number depends on your bracket and your federal treatment.
The cleanest way to see the combined federal-plus-California picture is to plug your own profit and federal rate into the state tax calculator below, which estimates both at once.
The federal side still applies
Federally, your event-contract gains can be treated as ordinary income, under Section 1256's 60/40 split, or as gambling, and the three lead to very different bills. That question is unsettled and applies no matter which state you trade from. Our Kalshi taxes guide walks through all three, and the cents-vs-dollars guide covers the most common reconciliation mistake.