Your Vote on the Line

• You have a say over big state tax increases. It’s called the Hancock Amendment (1980), and it means the state generally has to ask voters before raising taxes by a large amount. It’s why sales-tax questions go on the ballot.
• Amendment 5 sets that aside for five years. Lawmakers could raise and expand the sales tax — onto goods and services not taxed today — without asking voters first.
• There’s a second layer: in 2016, voters banned new sales taxes on services (haircuts, repairs, and the like). Amendment 5 would override that vote, too.
• The clean way to see it: you’d cast one “yes” that hands the legislature your say on every tax decision that follows. Vote once to give away your vote.
• A fair caveat: you still elect legislators, so you don’t lose your voice entirely. But directly approving a tax increase is different from electing a representative — and Amendment 5 removes that direct check for five years.
• Why schools care: the same legislature that sets school funding would also control the tax base under it — with no voter check. And the pressure to raise sales taxes is real: replacing the income tax could push the 3% rate to as much as 11.5% unless new things get taxed.

Bottom line: Amendment 5 is about who decides. For five years, it moves tax decisions from voters to the legislature, eliminating voter choice in a generational taxation shift.

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The Full Story: How Amendment 5 suspends the Hancock voter-approval protection

Most people don’t think about it, but Missouri voters have a say over big state tax increases. It comes from a rule in the state constitution called the Hancock Amendment, passed back in 1980. In plain terms, it means that when the state wants to raise taxes by a large amount, it generally has to come back and ask the voters first.

You’ve probably seen this rule in action without knowing its name. When there’s a public vote on a sales tax — say, for a stadium or a local project — that’s the kind of voter check the Hancock Amendment helps guarantee (KCTV5, May 23, 2026). It keeps the decision in your hands, not just the legislature’s.

What Amendment 5 would authorize

Amendment 5 would set that protection aside for five years. In that window, lawmakers could raise the sales tax and extend it to goods and services that aren’t taxed today — without coming back to ask voters (KCTV5, May 23, 2026). The voter-approval step would be switched off for the work of replacing the income tax. The amendment would authorize lawmakers to tax “transactions involving any goods and services” (Missouri Independent, April 21, 2026). Note the word “could”: this is permission for future action, not an automatic increase. But it’s broad permission, granted in advance, with the public’s usual veto removed.

There’s a second layer, too. In 2016, Missouri voters passed a separate measure. It banned new sales taxes on services — things like haircuts, home repair, and similar work. Amendment 5 would override that vote. The state constitution now blocks lawmakers from taxing services and real estate sales. But those protections would not apply to a sales-tax plan passed under this amendment (Missouri Independent, April 21, 2026). So lawmakers could tax services that voters already said no to, with no new vote.

The part that’s easy to miss

Here’s the cleanest way to understand it. Amendment 5 asks you to cast one vote — a single “yes” — that would hand the legislature power over tax decisions you’d normally get to weigh in on. You’d be voting once to give away your vote on what comes after.

It’s worth saying this carefully, because supporters have a fair response: you still elect your legislators, so you don’t really lose your voice. That’s true as far as it goes. But voting for a representative every couple of years is different from getting to approve or reject a specific tax increase. Amendment 5 would remove that direct check for five years. It would move the decision from “the people vote on it” to “the legislature decides.” Even the lawsuit against the measure argued that voters wouldn’t realize they were approving a broad new sales tax to replace the income tax (Missouri Independent, May 14, 2026).

Why this matters for schools

Schools have a stake here beyond the general principle. The same legislature that sets school funding would also control the tax base under it. It would decide what gets taxed and at what rate, with no voters at the table. When money gets tight, those two decisions pull on each other. The group that decides how much schools get would also decide how to raise the money — with the public’s direct check switched off.

And the pressure to raise sales taxes would be real, because the math is hard. To replace the income tax without taxing new things, the general-revenue portion of the sales tax would have to climb from 3% to as much as 11.5% — about an 8.5-point jump on that portion (Missouri Independent, June 1, 2026). To avoid a sky-high rate, lawmakers would need to tax more things. That’s exactly the kind of choice the Hancock rule normally sends to voters. So the voter-approval protection isn’t a technicality. It’s the check on the very choices Amendment 5 would force.