Kalshi taxes in Illinois
If you trade Kalshi from Illinois, your gains face tax on two fronts: the federal government, and Illinois itself. This page covers how Illinois 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 Illinois rate depends on your specific income, so treat the numbers here as estimates and confirm with a professional.
Do you owe Illinois tax on your Kalshi gains?
Yes, on two levels. Your Kalshi trading profit is taxable federally no matter where you live, and Illinois also taxes that income at the state level. So a winning year on Kalshi means both a federal bill and a Illinois bill on the same gains.
Illinois applies a flat rate of about 4.95% 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 Illinois treats prediction-market gains
Most states, Illinois 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 Illinois number: the state taxes your net gain either way.
Illinois uses a single flat income-tax rate of about 4.95%, which makes the state estimate straightforward once you know your net profit.
Estimating your Illinois bill
As a rough illustration, on a $5,000 net Kalshi profit, a 4.95% Illinois rate is about $248 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-Illinois 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.