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Iowa's 2022 tax reform set out a multi-year path from a nine-bracket system topping out at 8.53% toward a flat 3.9% by 2026. Strong revenues meant the state hit its targets early, and further legislation accelerated the schedule, landing on a flat 3.8% from the 2025 tax year — a year ahead of plan and below the original target.

The reform also eliminated Iowa's federal income tax deduction, which the state had previously offered. That partly offsets the headline rate cut, since taxpayers lost a deduction worth several thousand dollars while gaining a much lower rate. For most filers the net effect was still a substantial reduction.

Iowa's standard deduction now matches the federal figure, which is unusually generous for a state with such a low rate, and it means Iowa taxable income is meaningfully below gross pay.

From 2023 Iowa exempted retirement income entirely for taxpayers aged 55 and over — covering pensions, annuities, IRA distributions and qualified plan withdrawals, with no cap.

Combined with Iowa's long-standing exemption of Social Security benefits, this makes the state one of the most favourable in the country for retirees drawing on tax-deferred accounts. A retired couple in Iowa can have substantial retirement income and owe no state income tax at all.

The age threshold is 55, notably lower than the 59½ or 65 used by most states offering comparable relief, which makes Iowa attractive to early retirees in particular.

No Iowa city or county levies an income tax on wages. However, most Iowa school districts impose a surtax calculated as a percentage of your state income tax liability — not of your income.

The distinction matters. A 10% school district surtax means 10% of the tax you owe, not 10% of your earnings, so on a state bill of $2,000 it adds $200. Rates vary considerably by district and are published annually. Because it is assessed at filing rather than withheld through payroll, it does not appear on a payslip, which is why many Iowans are surprised by it.

Iowa also levies a relatively high property tax by effective rate, which has been the focus of repeated reform efforts as the income tax has come down.