Missouri Voters Reject Income Tax Plan

Tax forms with calculator, glasses, and pen — Photo: REDPIXEL.PL / Shutterstock

Missouri voters just crushed a plan to kill the state income tax and hand lawmakers a five‑year blank check to hike sales taxes on nearly everything they buy.

Story Snapshot

Missouri’s Amendment 5, which aimed to phase out the state income tax, lost by more than 4 to 1.
The measure would have let politicians expand sales taxes on goods and services without asking voters first for five years.
Opponents warned it was an “everything tax” that could hit working families and seniors at the checkout line.
The defeat keeps voter approval rules in place and stops a major shift from income taxes to consumption taxes.

What Amendment 5 Tried To Do To Missouri’s Tax System

Amendment 5 was written to slowly end Missouri’s individual income tax and replace it with higher and broader sales taxes. The court-approved ballot summary said lawmakers would “phase out” the income tax as revenue grew, while gaining power to expand sales and use taxes and cut some local taxes. Supporters, including Governor Mike Kehoe, sold it as a tax cut that would boost disposable income and put more money back into people’s pockets. But the fine print left big decisions to future politicians, not voters, for at least five years.

The Western District Court of Appeals in Missouri stepped in and rewrote the ballot language to make that clear. The new summary told voters the plan would expand sales and use taxes, weaken constitutional limits on taxing goods and services, and allow local tax rate cuts tied to new sales tax revenue. That legal change mattered because it warned voters this was not just a simple tax cut. It was a deep rewrite of the state’s tax rules that opened the door to taxing more everyday items most families rely on.

How Voters Responded At The Ballot Box

When Missourians went to the polls, they rejected Amendment 5 by a massive margin. KCUR reported that “no” votes were nearly 83 percent when the race was called, with only about 17 percent backing the tax swap. Other outlets described it as a resounding defeat for a key Republican priority, alongside another measure that would have tightened the rules for citizen-led constitutional amendments. The Associated Press and local stations quickly called the race, and social media posts showed conservatives and liberals alike noting the lopsided result.

Because Amendment 5 failed, lawmakers cannot use it to expand sales and use taxes statewide without going back to voters. The income tax, which brings in billions each year to fund core services, stays in place. Current constitutional protections that require voter approval for major tax changes remain intact. For Missourians, that means any big shift from income taxes to consumption taxes must still be debated openly and decided by the people, not quietly wired into the constitution and tweaked later in Jefferson City.

Why Many Missourians Saw It As A Threat To Working Families

Groups on the left and center, and some on the right, warned Amendment 5 was a classic “tax cut for the rich, tax hike for everyone else” scheme. The Institute on Taxation and Economic Policy argued that ending the income tax while raising sales taxes would help the highest earners and shift costs onto working families and seniors, who spend more of their income on taxed goods. AARP Missouri told its members the plan “means higher costs for Missourians,” highlighting worries about groceries, medicine, and utilities becoming more expensive over time.

Missouri election results: See vote tallies on Amendment 4, Amendment 5 & more https://t.co/oIT1vhwlLJ

— The Kansas City Star (@KCStar) August 5, 2026

Legal and civic explainers went further and called it the “everything tax.” Senator Joe Nicola warned it would allow the legislature to create “ANY new state or local taxes” on transactions of goods or services to cut the income tax. A detailed voter guide from a Missouri equity group said the amendment would suspend key voter-approval protections for several years while lawmakers built a new sales tax system on top of that broad authority. For many everyday voters, that sounded like a blank check for political insiders, not a targeted tax relief plan for families struggling with inflation.

What This Defeat Means For Conservatives And Tax Fights Ahead

For constitutional conservatives, the Amendment 5 fight is a warning and a lesson. The goal of lower income taxes is popular, especially with a base tired of government overspending and high federal taxes. But voters do not want their state constitution turned into a tool for backdoor tax hikes on daily life. The Missouri result shows people will push back when “tax cuts” are tied to open-ended new taxing power, even when Republican leaders and donors pour millions into the campaign.

Going forward, serious tax reform will need clearer guardrails and more respect for direct voter control. A plan that trims income tax rates, cuts waste, and protects families from higher sales taxes on basics would likely get a better hearing than an all-or-nothing constitutional rewrite. Missouri’s message was simple: do not hide broad new taxing authority behind feel-good slogans about growth and freedom. For conservatives who believe in limited government and transparent lawmaking, that message should shape the next wave of tax debates in Missouri and other red-leaning states.