Ballot measure · Colorado · November 3, 2026

Proposition 136

Title as the state lists it: Income Tax Rate Limit1,2

Research draftCitizen initiativeState law
How it got there
Citizen initiative
Kind of measure
State law
To pass
A majority of the votes on it
Researched
October 27, 2026

Research draft. We gathered this from official sources on October 27, 2026: election offices, state laws and court records, each linked to its source. Separate reviewers checked a random sample of 48 facts from the ballot-measure research against the cited sources and found no errors. The rest hasn't been reviewed fact by fact yet, so check the linked source before relying on anything here.

§1What your vote means

Drafted by AI from the public sources cited. Each sentence links to its source.

A yes vote

A yes vote would set the current 4.4 percent rate as the highest state income tax rate allowed by state law for individuals and corporations, starting January 1, 2027.2 p. 62

A no vote

A no vote would keep the current 4.4 percent state income tax rate without adding a rate cap to state law.2 p. 62

More about it

If both Proposition 136 and Amendment 87 pass, the Blue Book says the rates above 4.4 percent in Amendment 87 would conflict with this cap, and the legislature or a court would decide how to resolve it.2 pp. 62-63

§2How it got on the ballot

Citizen initiative. Voters proposed it by signing a petition.1,2

State law. It would change state law, not the constitution.1,2

It is on Colorado's list of statewide measures for November 3, 2026.1,2 One of these official sources itself calls the list certified or final. What we couldn't confirm about the list is in the notes on Colorado's measures.

§3What it needs to pass

Drafted by AI from the public sources cited. Each sentence links to its source.

A majority of the votes on it. Needs more yes votes than no votes.1,2,3 Colo. Const. art. V, § 1(4)(a); Blue Book p. 62