Proposition 136: Income Tax Rate Cap
Source: results.enr.clarityelections.com
What does this measure do?
Colorado's income tax rate for people and companies could never go above the current 4.4% of federal taxable income, starting in 2027. Your tax bill would not change now, but future rates above 4.4% would be blocked, and this could block Amendment 87's higher tax rates if both pass.
Proposed by: Citizen initiative by Advance Colorado (Initiative 232; Suzanne Taheri and Michael Fields)
Advance Colorado is a conservative group led by Michael Fields. It filed this cap to compete with Amendment 87, which would tax higher incomes at higher rates.
Source: news.ballotpedia.org
A YES vote means
The income tax rate is capped at 4.4% by state law, so no future tax rate above that could take effect without changing this law.
A NO vote means
The rate stays 4.4% for now, but the legislature or voters could raise it in the future.
Campaign Finance Information
Campaign Finance Information
Largest donors supporting
- Common Sense America · VANational nonprofit; donors not public$250,000
- Advance ColoradoColorado conservative advocacy nonprofit$20,000
- Richard McCormickDenver retiree$5,000
Some of this money went to groups that also work on other measures.
Largest donors opposing
- The Bell Policy CenterDenver policy research nonprofit$132,824
- New Era Colorado Action FundYoung voter organizing group$131,127
- Colorado Statewide Parent CoalitionParent advocacy nonprofit$127,680
- Great Education Colorado ActionSchool funding advocacy group$111,130
- Colorado Fiscal InstituteTax policy research nonprofit$86,466
Some of this money went to groups that also work on other measures.
Filings as of September 17, 2026 · Sources: tracer.sos.colorado.gov23
Sources: coloradosos.gov · sos.state.co.us · leg.colorado.gov