Missouri Income Tax Cut: Why Illinois and Kansas Win

Missouri is moving toward a potential elimination of its state income tax, a proposal that would shift the state’s primary revenue reliance toward expanded sales taxes. The decision would ultimately rest with voters through a constitutional amendment on a statewide ballot later in 2026.

On April 14, 2026, the Senate Fiscal Oversight Committee advanced the plan in a 6-3 party-line vote. The proposed measure would ask voters for permission to eliminate the state income tax and grant lawmakers the authority to increase and expand sales taxes to offset the lost revenue.

Estimated Costs and Revenue Impact

The financial implications of the proposal are significant. Missouri’s individual income tax currently generates between $8.5 billion and $9 billion annually, accounting for approximately 60% to 65% of the state’s general revenue. These funds serve as the primary source of funding for core state services, including public safety and public schools.

During committee debates on April 14, 2026, it was revealed that the first-year cost of the proposal had risen to $4.2 billion under revisions made in the state Senate. These revisions were characterized as drafting errors during the discussion.

Legislative and Political Debate

The proposal has highlighted a sharp divide between Republican and Democratic lawmakers regarding the growth of state government and the maintenance of public services.

State Senator Rick Brattin, a Republican from Harrisonville, argued that the elimination of the tax would benefit citizens directly, stating that Missouri families will find it easier to pay their bills without a state income tax.

Conversely, Democrats have expressed concern over the state’s ability to fund essential services. State Senator Maggie Nurrenbern, a Democrat from Kansas City, questioned how the state would manage its financial obligations, stating:

It is not hyperbolic to say we are going to be in tight straits. I do not know how we are going to pay the bills.

State Sen. Maggie Nurrenbern

National Context

Missouri’s legislative push is part of a broader national trend where several states are reducing or phasing out income taxes. Similar efforts to cut or eliminate state income taxes have been pursued in Oklahoma, Mississippi, and Kentucky.

If the amendment reaches the ballot and is approved by voters, the state would transition toward a tax structure based more heavily on consumption through sales taxes to sustain its general fund.