For years, Iowa’s income tax system was a barrier to growth, competitiveness, and opportunity. Today, the state stands out nationally for reversing course: cutting rates, simplifying the code, and putting taxpayers back in control of more of their earnings.
In 2018, Iowa’s top individual income tax rate stood at 8.98 percent under a complex progressive system with nine tax brackets and numerous credits and exemptions designed to cushion taxpayers from high marginal rates. Federal tax changes enacted through the Tax Cuts and Jobs Act of 2017 created an opportunity for Governor Kim Reynolds and the Iowa Legislature to pursue meaningful reform. In response, lawmakers enacted a series of tax changes that began lowering both individual and corporate income tax rates.
In 2022, the legislature passed the most significant reform of all, eliminating the multi-rate progressive income tax and replacing it with a single flat tax. That reform was accelerated in 2024, when lawmakers moved up the full phase-in and reduced the rate further—from 3.9 percent to 3.8 percent. In just seven years, Iowa went from an income tax rate near 9 percent to a flat 3.8 percent, representing nearly a 60 percent reduction in the top rate. Iowa has since become a leader in the national “flat tax revolution,” with 14 states now operating under flat income tax systems.
Before these reforms, Iowa’s tax climate ranked among the worst in the nation, as reflected in the Tax Foundation’s State Business Tax Climate Index. Since then, Iowa has climbed an impressive 27 spots—from 44th to 17th—in the Tax Foundation’s 2026 State Tax Competitiveness Index. Our state has even been recognized as leading the nation in tax cuts during the 21st century.
Iowa’s 3.8 percent flat tax is not only a major policy achievement, but also a significant benefit for taxpayers and the state’s economy. Lower, simpler tax rates make Iowa more competitive and attractive to workers, families, and businesses. Equally important is how these reforms were accomplished.
Iowa was able to enact deep income tax cuts because state leaders paired reform with conservative budgeting. Governor Reynolds and the legislature held the line on spending, allowing tax rates to be reduced responsibly and sustainably. This disciplined approach is one reason the Cato Institute twice ranked Governor Reynolds as the most fiscally conservative governor in the nation.
Iowa’s 3.8 percent flat tax was achieved through conservative budgeting, and it can be protected and preserved only by maintaining that same fiscal discipline. Just as importantly, disciplined spending is the pathway to making further income tax reductions possible in the future. By continuing to restrain government growth and prioritize responsible budgeting, Iowa can create the conditions necessary to responsibly lower tax rates again—without jeopardizing the state’s fiscal stability.
The tax reform landscape remains dynamic, and states that fail to continue improving their tax climate risk falling behind those that do. In 2026, several states are beginning the year with lower income tax rates, including:
Competition among states to lower income tax rates has intensified. Tax rates matter not only to current residents, but also to attracting new workers, families, and businesses. Iowa cannot afford to become complacent when it comes to tax reform.
Iowa has established itself as a national leader in state tax reform. Whether addressing income taxes or turning next to property tax reform, continued progress will ensure Iowa remains the gold standard for pro-growth, taxpayer-focused fiscal policy.
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