Statewide ballot measure
Proposition 136 (Initiative 232): A 4.4 percent cap on the state income tax rate
On the November 3, 2026 ballot
- Ballot number
- Proposition 136
- Filed as
- Initiative 232
- Type of measure (Legislative Council)
- Statutory
The ballot question
Shall there be a change to the Colorado Revised Statutes capping the state income tax rate at 4.4% of federal taxable income for individuals and corporations?
What a vote does
- A yes vote means
- The individual and corporate income tax rates could not exceed 4.4 percent of federal taxable income, beginning with tax year 2027. Both rates are already 4.4 percent, and the fiscal impact statement estimates no effect on state or local revenue or spending.
- A no vote means
- The measure is not enacted. Current statute continues to set the individual and corporate income tax rates at 4.4 percent, and the state constitution continues to require a vote of the people before the rate is increased.
Figures from the fiscal estimate
- Cap applies: Tax year 2027 onward
- The measure would take effect on the governor’s proclamation after voter approval.
- Proposed cap: 4.4%
- Matches the current statutory individual and corporate rate.
- Fiscal impact: None estimated
- Legislative Council Staff, April 7, 2026; the cap matches current rates.
Legislative Council ballot analysis
Official documents
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Key dates
- October 2 to October 9: county clerks mail ballots to active voters.
- October 12: drop boxes open.
- October 26: last suggested day to return a ballot by mail.
- From October 27: return your ballot to a drop box or vote center instead of mailing it.
- November 3, 2026, Election Day: ballots are due by 7:00 p.m.
Page updated September 29, 2026