Why It Matters
Missouri voters will decide August 4 whether to renew a one-tenth-cent sales tax that has funded state parks and soil and water conservation for more than four decades. The tax generates roughly $140 million annually and supporters say a defeat would put an irreplaceable funding stream at risk — one that has grown more popular with voters over time, not less.
What Happened
The measure, which requires regular voter renewal unlike the state’s other two earmarked sales taxes, is seeking a 10-year extension. Since narrowly passing in 1984, the tax has been renewed four times with expanding margins. Its most recent renewal in 2016 drew 80 percent of the statewide vote and carried every single county in Missouri.
This cycle’s campaign is unfolding in a very different environment. The August primary ballot is crowded with competing proposals, including Amendment 5, a measure that would give state lawmakers a five-year window to raise the state sales tax or expand taxable items as a mechanism for reducing or eliminating the personal income tax. Amendment 5 backers have already spent $2 million on broadcast advertising, a figure that dwarfs what parks supporters have raised.
Citizens for State Parks, Soil and Water, the main campaign backing the renewal, has raised $109,221 so far. The Missouri Soybean Association made the largest single contribution at $50,000, followed by the Missouri Corn Growers at $25,000, and Missouri Cattlemen and the Missouri Parks Association each contributing $10,000.
By the Numbers
The tax costs Missourians 10 cents on every $100 in purchases and keeps the overall state sales tax rate at 4.225 percent if renewed. For the budget year beginning July 1, it is set to deliver $42.5 million for state parks and historic sites operations, with an additional $59 million accumulated for deferred maintenance and construction projects. Soil and water conservation districts across the state are slated to receive $69.7 million for erosion control and stream stabilization grants.
Missouri’s 57 state parks and 36 historic sites rely on the tax as their primary dedicated funding mechanism. The soil conservation component has also shown measurable results: before the tax took effect, Missouri croplands were losing an average of 10.8 tons of topsoil per year. That rate has since been cut by more than half.
The Crowded-Ballot Problem
Supporters are candid about what worries them most heading into August. Primary elections draw lower turnout than general elections, and Missouri’s primary electorate skews heavily Republican and generally skeptical of tax measures. With multiple high-dollar campaigns running simultaneously, organizers fear voter fatigue could work against even well-established and popular measures.
“The challenge is when voters go to the polls and they have all this stuff on the ballot, when they’re hearing millions of dollars of TV ads encouraging them to vote no on this amendment or that amendment,” said Jonathan Ratliff, associated with the parks renewal effort.
The concern is that broad anti-tax sentiment stirred up by debates over Amendment 5 could spill over and depress support for the parks measure, which has historically operated in a different political lane. Supporters are hoping the tax’s long track record and broad agricultural backing help insulate it from that dynamic. Republican Senate primaries in August are also expected to shape several other ballot outcomes, adding another layer of uncertainty to the political environment.
Zoom Out
Missouri’s parks system is marking its 100th anniversary this year, adding symbolic weight to the renewal fight. The state’s approach — a small dedicated sales tax renewed by voters on a rolling schedule — is relatively uncommon nationally and reflects a long-standing compact between Missouri voters and their public lands. Competing measures on the same ballot have previously complicated voter decision-making in Missouri, and this cycle appears to be testing that dynamic again.
Laura Hendrickson, who has worked in Missouri state parks for 30 years, described the tax as foundational to the system’s stability. “Having a reliable or dedicated funding source, such as the sales tax, provides a predictable way to provide public services,” she said.
What’s Next
August 4 is the decisive date. If the measure fails, it would mark the first defeat for the parks tax since its original narrow passage more than 40 years ago. Supporters are expected to continue fundraising toward an overall campaign goal of roughly $1 million, though they remain far behind the spending levels of other measures competing for voter attention on the same primary ballot.