Iowa Gambling Tax Calculator

Gambling tax in Iowa

Iowa switched to a flat 3.8% rate starting in 2025, so filing status and income level no longer change what the state takes. Winnings are taxed at that single rate with no county or city layer on top, and losses reduce the Iowa figure whenever you itemize on your federal return.

Iowa at a glance

Netting helps, the 90% cap still bites

The headline rate is only half the story for a bettor moving a lot of money. What matters more is whether the state looks at the winning column or the net. Iowa looks at the net once you itemize federally, so a heavy-turnover season is taxed on the winnings left after the deductible slice of the losses comes off. That slice stops at 90% of what you lost, and the rest stays in the Iowa figure: a break-even $1,000,000 season leaves $100,000 of gambling income on the Iowa return and a $3,800 bill on money the bettor never kept. Illinois, at a nominally similar 4.95%, taxes the full winning column and charges $49,500 on the same season. Netting is worth far more than the 1.15 point gap in headline rates suggests, but it is not the same as turnover being free.

Iowa gambling tax FAQ

Gambling tax in other states