State income tax policy remains one of the clearest dividing lines in American politics. During the 2026 legislative sessions, states moved in sharply different directions. Some pursued higher rates, wealth taxes, and new sources of revenue to support expanded government spending. Others enacted tax cuts and advanced plans to eventually eliminate their income taxes. At the same time, voters in several states may soon decide major tax questions at the ballot box.
This three-part series examines those developments. The first article provides an overview of the income tax legislation enacted across the states in 2026. The second explores the competing fiscal philosophies behind those decisions, contrasting states focused on spending restraint and tax relief with those seeking a larger role for government financed by higher taxes. The final article focuses on Colorado, where one of the nation’s strongest taxpayer protections, the Taxpayer Bill of Rights (TABOR), has become the center of an ongoing political battle. As efforts to weaken or circumvent TABOR continue, Colorado offers a revealing case study of the broader debate over taxes, spending, and the proper size of government.
Income tax reforms enacted by states in 2026 were not isolated policy decisions. Rather, they reflected a growing divide over the role of government, taxation, and economic growth. Budgeting and spending is at the heart of tax policy.
Whereas several states continue to reduce income tax rates, many others are raising rates in order to accomplish the objectives of subsidizing greater spending and trying to solve budget shortfalls.
The Tax Foundation notes that “each state has its own unique tax landscape. While outliers do exist, states with lower tax collections per capita have generally opted for a more limited government approach, pairing lower taxes with economic growth strategies focused on attracting residents, workers, and businesses.”
At the same time, many high-tax states continue to pursue additional spending and new revenue sources. In these states, policymakers have responded to budget pressures by seeking higher tax rates, wealth taxes, and other tax increases. In some cases, the drive for additional revenue extends beyond closing budget gaps and reflects an effort to expand government programs, particularly in areas such as education and social services.
A major challenge facing many of these states is spending growth. The Illinois legislature just finished their session and they passed a record $55.9 billion budget, which contains over $800 million in new tax increases. The Tax Foundation noted that “Minnesota has spent more than it has collected in revenue every year since 2024 and is forecast to continue doing so through at least 2029, when it expects to face a deficit of $6 billion for that fiscal year.”
Too often, policymakers assume that higher tax rates will generate sufficient revenue to sustain larger budgets. However, higher tax burdens can also discourage economic growth and encourage individuals and businesses to relocate elsewhere. When taxpayers leave a state, the economic consequences extend beyond population loss and can ultimately affect future revenue collections as well.
Analysis by Americans for Tax Reform (ATR) highlights the divide. Iowa’s neighbors, Minnesota and Illinois, provide examples of states that have generally embraced a higher-spending approach to government. Illinois’ tax-and-spend approach has imposed an estimated cost of $113,683 per family, while Minnesota’s approach has cost an estimated $24,010 per family.
Other states have chosen a different path. States such as Iowa have embraced a more fiscally conservative approach, focusing on spending restraint, tax competitiveness, and economic growth. ATR estimates Iowa families have benefited from roughly $5,493 in savings due to spending restraint and tax reform.
The decision to embrace fiscal restraint has contributed to continued income tax reductions across much of the country. States enacting these tax cuts have generally paired conservative budgeting and controlled spending growth with fiscal safeguards such as revenue triggers. These mechanisms automatically reduce tax rates when revenues exceed specified benchmarks, ensuring that tax relief is tied to economic growth and available resources. By linking rate reductions to fiscal performance, revenue triggers promote budget discipline while providing a sustainable path to lower taxes.
Iowa has been one of the leading examples of balancing conservative budgeting with income tax relief. Under Governor Kim Reynolds and the Legislature, Iowa’s individual income tax has been transformed from a progressive system with a top rate of 8.98 percent to a flat 3.8 percent tax, a reduction of nearly 60 percent. Iowa’s corporate income tax, once the highest in the nation at 12 percent, is also being phased down to a flat 5.5 percent rate.
Iowa was an early participant in the recent flat-tax movement. Arizona’s adoption of a 2.5 percent flat tax helped accelerate a trend that Iowa, Mississippi, Georgia, Idaho, Kansas, and Ohio have since followed. Several of those states are now pursuing even lower rates through revenue triggers, with Ohio’s flat tax already falling to 2.75 percent.
Arkansas offers another example of this philosophy. Governor Sarah Huckabee Sanders recently called a special session to enact a fourth round of income tax cuts. Since taking office, Arkansas has reduced both its individual and corporate income tax rates, and Sanders has made clear that her long-term goal is eventual income tax elimination.
The reason Governor Sanders called the special session was the strong financial foundation of Arkansas. “Financial stability increased economic growth, healthy reserve accounts, and conservative spending policies,” established the pathway for additional rate reductions in Arkansas.
The growing divide among the states is ultimately about more than tax rates. It reflects two competing views of government. One seeks higher spending supported by higher taxes and additional revenue sources. The other prioritizes spending restraint, economic growth, and returning more money to taxpayers through lower tax rates. As states continue moving in these different directions, the contrast between those opposing fiscal philosophies is becoming increasingly clear.
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