Colorado · Ballot measure
Proposition 136: Income tax rate limit
On the ballot: November 3, 2026 Citizen-initiated statute (majority vote)
A YES vote means
The current state income tax rate of 4.4% would become the maximum rate allowed in state statute for individuals and corporations.
A NO vote means
The rate stays at 4.4%, without a new limit in statute.
Who supports it
- Advance Colorado
- Brighter Colorado
- Colorado Union of Taxpayers
- No on 87, Yes on 136
- Victor Marx (R)
Who opposes it
- Make Good Change
- People for a Fair Colorado
- Protect Colorado’s Future Coalition
- Vote Common Sense
- Watchdog for the People
From official campaign filings and public endorsements, each linked on the full page (checked October 30, 2026). Not complete; not an endorsement.