Iowa Public Measure 1: Supermajority for state income-tax increases
Iowa · Constitutional amendment · Taxes · Statewide decision
Explanation reviewed 2026-10-27. AI-written and checked against linked official evidence; not an election-office summary.
AI-written summary
Would require two-thirds of elected members in each legislative chamber to approve a new state income tax or an increase in an income-tax rate. Local option taxes are excluded, and challenges would have a one-year filing limit.
What applies now
The constitution does not impose this proposed two-thirds voting rule for state income taxes.
If yes / for
Add the legislative supermajority requirement.
If no / against
Keep the existing legislative voting rules.
Costs and funding
No verified fiscal estimate recorded in this baseline. This does not mean there is no cost.
Timing
Implementation date not independently established in this baseline.
Passage rule
Threshold not independently established here; consult the official text.
Some official sources do not have comparable automated archives. Consult the linked evidence and its review date.