2025 Iowa Income Tax Brackets. This page has the latest iowa brackets and tax rates, plus a iowa income tax calculator. When will iowans see a cut from the flat tax?

16 announced that the 2025 individual income tax rate will be a flat rate of 3.8 percent with no income brackets, and the. Since the enactment of iowa senate file 2442 in may 2025, iowa law provides for a flat tax rate of 3.8 percent for all levels of taxable individual.