Iowa voters appear to have approved a proposed constitutional amendment that would require a two-thirds majority vote in both the Iowa House and Senate before lawmakers could increase personal or corporate income taxes.
According to unofficial results reported by the Associated Press, Amendment 1 received approximately 55% of the yes vote and 45% of the no vote, with 84% of votes counted as of 12:05 a.m. Wednesday.
If approved, the amendment would establish a higher voting threshold for future increases to personal and corporate income tax rates.
Supporters of the amendment, primarily Republicans, say the requirement would protect Iowa’s existing tax policies, including the state’s 3.8% flat income tax rate approved in 2025. They maintain that lawmakers could still increase income taxes if necessary, but would need broader bipartisan support to do so…