What Missouri’s Tax Amendment Actually Does: A Plain-Language Legal Analysis

Every election cycle, Missouri voters are asked to decide constitutional amendments that may permanently alter the laws governing our state. Unfortunately, the language appearing on the ballot is necessarily condensed, often technical, and frequently incapable of explaining the practical consequences of a proposed amendment. As a result, many voters cast ballots based upon campaign advertisements or brief ballot summaries rather than the actual legal text.

As an attorney, I believe voters deserve better. This article is not intended to persuade anyone how to vote. Whether you support or oppose this proposal is ultimately a political decision. My objective is much narrower: to explain, in plain English, what the proposed amendment would legally accomplish and to identify several questions that deserve careful consideration before any ballot is cast.

The Ballot Summary Is Only the Beginning

At first glance, the proposal appears relatively straightforward. It is commonly described as an amendment that would gradually eliminate Missouri’s individual income tax while reducing certain property taxes and expanding the State’s authority to rely upon sales and use taxes as replacement revenue.¹

That description is not necessarily inaccurate, but it is incomplete.

Constitutional amendments rarely operate in a vacuum. Every provision added to the Missouri Constitution has legal consequences beyond the language contained in a ballot summary. Understanding those consequences requires examining not only what the amendment says, but also how Missouri’s existing tax structure currently functions.

Eliminating One Tax Does Not Eliminate the Need for Revenue

Missouri’s General Revenue Fund finances a substantial portion of the State’s governmental operations, including the judicial system, public safety, corrections, transportation, and numerous administrative agencies.² Individual income taxes have historically represented one of the State’s principal sources of General Revenue.³

Accordingly, if Missouri ultimately eliminates individual income taxes, the State must either reduce expenditures, identify alternative sources of revenue, increase other taxes or fees, or adopt some combination of those approaches. This is not a political observation; it is a matter of governmental finance.

The proposed amendment recognizes this reality by authorizing changes to Missouri’s sales and use tax structure as income tax reductions occur.⁴ Whether those future changes would fully replace lost revenue, reduce government spending, or require additional legislative action remains a question for future policymakers.

The Amendment Does Not Automatically Eliminate Property Taxes

One of the more confusing aspects of the public discussion surrounding this proposal involves property taxes.

Many campaign advertisements suggest that the amendment “eliminates property taxes” or substantially reduces them. The actual legal framework is considerably more nuanced.

Unlike Missouri’s individual income tax, property taxes are primarily imposed and collected by local governmental entities, including counties, municipalities, school districts, library districts, ambulance districts, and fire protection districts.⁵ Those taxes fund local services rather than the State’s General Revenue Fund.

The proposed amendment contains provisions affecting certain property taxes under specified circumstances, but implementation would depend upon future legislation, revenue triggers, and the interaction between state and local governmental finance. Consequently, homeowners should avoid assuming that passage of the amendment would immediately or uniformly reduce their annual property tax bills.

Sales Taxes Become Increasingly Important

Perhaps the most legally significant aspect of the proposal receives comparatively little public attention.

Rather than simply eliminating income taxes, the amendment creates a constitutional mechanism through which Missouri could increasingly rely upon sales and use taxes as a primary source of governmental revenue.⁶

That distinction matters.

Income taxes and sales taxes operate differently. Income taxes are generally based upon earnings. Sales taxes are generally imposed upon consumption. Whether one system is preferable to another is a policy question on which reasonable people may disagree. From a legal standpoint, however, voters should recognize that the amendment addresses not merely tax reduction but a broader restructuring of Missouri’s tax system.

Constitutional Amendments Are Different Than Ordinary Legislation

Another important consideration has nothing to do with taxation.

If the General Assembly enacts an ordinary statute, a future legislature may amend or repeal that statute through the ordinary legislative process. Constitutional amendments are fundamentally different. Once language is added to the Missouri Constitution, modifying or removing that language ordinarily requires another constitutional amendment approved by Missouri voters.⁷

For that reason alone, constitutional amendments deserve particularly careful scrutiny. Voters are not simply deciding whether they support a particular tax policy today; they are deciding whether that policy should become part of Missouri’s foundational governing document.

Questions the Amendment Does Not Fully Answer

The amendment also leaves several practical questions that cannot be answered solely by reading the ballot summary.

For example, if individual income taxes are eventually eliminated, which governmental services, if any, would be funded differently? Which goods or services might become subject to expanded sales taxation in the future? How would economic downturns affect implementation if anticipated revenue growth does not occur? What discretion would future General Assemblies possess when determining how replacement revenue should be generated?

These are not criticisms of the amendment. They are simply questions that naturally arise whenever a proposal seeks to restructure a state’s tax system.

Read Beyond the Campaign Advertisements

Campaign advertisements—regardless of which side produces them—are designed to persuade. Attorneys are trained to do something different: read the actual language, identify what it accomplishes legally, and consider how it may operate in practice.

Whether you ultimately vote in favor of this amendment or against it, I encourage you to read the official ballot title, review the complete text of the proposed amendment, and consider both its intended benefits and its potential long-term legal consequences before casting your ballot.

Our constitutional system functions best when voters understand not merely what they are being promised, but what the law would actually say if the amendment becomes part of the Missouri Constitution.

Attorney’s Note

This article is intended solely as a plain-language explanation of a proposed constitutional amendment. It should not be interpreted as an endorsement or opposition to the proposal, nor does it constitute legal advice. Every voter should review the official ballot language and the complete text of the proposed amendment before voting.

Footnotes

1. Missouri Secretary of State, 2026 Ballot Measures, Official Ballot Title and Fair Ballot Language for the proposed tax amendment.
2. See Mo. Const. art. IV; see also Missouri Office of Administration, Missouri Budget Explorer.
3. Missouri Department of Revenue, Individual Income Tax Overview.
4. Missouri Secretary of State, 2026 Ballot Measures, Official Text of Proposed Constitutional Amendment.
5. See Mo. Const. art. X; see also Mo. Rev. Stat. chs. 137–140 (property taxation).
6. Missouri Secretary of State, 2026 Ballot Measures, Official Text of Proposed Constitutional Amendment.
7. Mo. Const. art. XII, §§ 1–3.