Missouri Appeals Court Keeps Tax Overhaul on August Ballot, Orders Revised Summary

A Missouri appeals court has ruled that a sweeping constitutional amendment to eliminate the state’s individual income tax will remain on the August 4 primary ballot, but ordered that its summary be rewritten to more clearly explain its effects to voters. The decision keeps the controversial measure, known as Amendment 5, in play after a lower court had previously upheld the original ballot language written by state lawmakers.

If approved by voters, Amendment 5 would authorize the Missouri legislature to phase out the state income tax, which currently accounts for about two-thirds of the state’s general revenue. To replace that funding, the proposal would grant lawmakers broad new powers to expand the state sales and use tax to nearly all goods and services, without requiring further voter approval for such increases. The pace of the income tax reduction would be tied to triggers based on state revenue growth.

While the prospect of eliminating state income taxes is appealing on the surface, the proposed shift to a broad-based sales tax system in Missouri represents a significant operational and financial risk for small and mid-sized businesses. In our experience, such fundamental tax restructuring creates immense uncertainty. Businesses, particularly those in the service sector that have never had to collect sales tax, would suddenly be tasked with navigating a complex new compliance regime. This isn't just a change in what taxes are paid; it's a change in who bears the primary burden of collection and remittance.

The administrative costs of tracking, calculating, and remitting tax on potentially every transaction, including services, could be substantial and would require a complete overhaul of accounting and invoicing systems. This proposal effectively turns every business into a primary tax collector for the state. Navigating these complexities is precisely the kind of challenge we handle in our tax preparation and compliance practice. For Missouri business owners contemplating the impact of Amendment 5, proactive planning is essential. C&S Finance Group LLC at csfinancegroup.com can help assess the potential operational changes and ensure your business is prepared for any outcome.

The legal challenge to Amendment 5 was initiated shortly after the legislature placed it on the ballot. Opponents sued, arguing the measure was unconstitutional because it violated the state’s single-subject rule for legislation and that its official ballot summary was misleading. Chuck Hatfield, the attorney representing the plaintiffs, argued that the summary failed to inform voters of the true consequences of the amendment. “Lawmakers failed to tell voters the truth about Amendment 5 — it would mean the largest expansion of sales taxes in Missouri history, while giving lawmakers a license to ignore current constitutional taxpayer protections,” Hatfield said in a statement.

On Monday, June 2, Cole County Judge Christopher Limbaugh rejected those arguments, allowing the measure to stay on the ballot with its original summary. In his 10-page ruling, Judge Limbaugh wrote that the proposal’s “central purpose is unmistakable and readily identifiable: the elimination of the state individual income tax through a coordinated restructuring of state and local taxation.” He found the summary to be “sufficient and fair.”

Hatfield immediately appealed that decision, leading to the appeals court's ruling which modified the summary while keeping the amendment on the ballot. The debate over the summary’s fairness highlighted the difficulty of condensing a major tax overhaul into a 50-word statement. One attorney noted during arguments that the mandate to eliminate the income tax was not a mere suggestion and that the summary needed to reflect that requirement. Proponents of the original language argued that the General Assembly has wide discretion in crafting summaries and that the court should respect its judgment.

The stakes of the amendment are substantial. Opponents have pointed to language in the proposal that uses the word “notwithstanding” to signal its power to override other constitutional provisions. This could potentially dismantle taxpayer protections such as the Hancock Amendment, which limits the legislature's ability to raise taxes without a public vote. Furthermore, the amendment would give lawmakers authority over constitutionally dedicated sales taxes that fund the Department of Conservation and state parks.

This legal fight over ballot language is particularly significant in Missouri due to recent precedent. In a 2022 case involving a measure designated Amendment 4, the Missouri Supreme Court took the rare step of overturning an election result because it found the fiscal summary on the ballot was materially misleading to voters. The court found that the summary’s omission of a significant estimated cost to a local government was a severe enough irregularity to invalidate the vote and order a new election with a court-revised summary. This history underscores the critical importance of ballot language in the state and why opponents pursued the challenge to Amendment 5 so vigorously.

With the appeals court having rendered its decision on the summary language, the focus now shifts from the courtroom to the public square. Proponents and opponents of Amendment 5 will spend the next two months making their case directly to Missouri voters, who will deliver the final verdict on August 4 on one of the most significant tax restructuring proposals in the state's history.