Amendment 1: Two-Thirds Legislative Vote Required to Raise Income Taxes
My vote power
Above average
Election date
November 3, 2026
Amendment 1: Two-Thirds Legislative Vote Required to Raise Income Taxes is a ballot measure in Iowa on the November 3, 2026 ballot. Requires two-thirds of both the Iowa House and Senate, instead of a simple majority, to pass any increase in the individual or corporate income tax rate or any new state income tax. Your taxes do not change now; future income tax increases would be harder to pass.
How do we calculate my vote power?
What determines the vote power rating for ballot measures: Representation: how much weight one vote carries here compared with a statewide vote — the smaller the district, the more each vote counts. You have more power in ballot measures because you vote directly on the policy.
Representation: Average · 50 out of 100
This district covers a large share of its state, so each vote carries about average weight — like a vote in a statewide race. About 3,210,507 people live here.
Show the representation math
score = 50 + 50 × ln(state population ÷ this district's) ÷ ln(50,000) = 50 + 50 × ln(3,210,507 ÷ 3,210,507) ÷ ln(50,000) = 50, measured against a statewide vote in IA (grades: 66+ high, 55+ above average, 33+ average, otherwise low; a statewide race is the 50 baseline)
Average representation + a direct vote on the policy → My vote power: Above average.
What does this measure do?
Requires two-thirds of both the Iowa House and Senate, instead of a simple majority, to pass any increase in the individual or corporate income tax rate or any new state income tax. Your taxes do not change now; future income tax increases would be harder to pass.
Read the official ballot measure
A YES vote means
Raising Iowa's income tax rates would need 67 House and 34 Senate votes instead of a simple majority; local-option taxes are not affected.
A NO vote means
A simple majority of lawmakers can still raise income tax rates.
Sources: ballotpedia.org · kjan.com
Source: ballotpedia.org
Last updated September 24, 2026.