Colorado Weighs Plan to Hike Top Income Tax Rate

A new proposal suggests increasing the state's top income tax rate to 8.4 percent.

Updated on Oct. 21, 2026 in Taxes

Isometric editorial illustration of a sharp mountain peak composed of rigid geometric shapes in shades of blue and cream. — Colorado lawmakers are debating a proposal to increase the state's top income tax rate from 4.4 percent to 8.4 percent. AI Illustration. Upload story photo >

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Should your state government increase income tax rates for high earners?

A proposal is currently under consideration to significantly increase the top state income tax rate in Colorado. The measure would raise the existing 4.4% rate to 8.4%.

Why it matters

The change would nearly double the top flat income tax rate, sparking debate over the state's long-term economic competitiveness. Opponents warn the hike could drive residents to states with no income tax and hinder business recruitment efforts.

Colorado currently maintains a top income tax rate of approximately 4.4%. The proposed legislation aims to increase this rate to 8.4%.

The details

The proposed policy change involves nearly doubling the current flat income tax rate used in the state. Critics suggest this move may discourage businesses from remaining in or relocating to Colorado.

The proposal was discussed in a news interview in October 2026.

Market Dynamics

This proposal marks a major departure from the state's history of adhering to fiscal constraints established by the Taxpayer's Bill of Rights. Such a significant shift in tax policy could fundamentally alter the state's trajectory within the broader national macroeconomic cycle.

The proposed tax increase could impact personal wealth management and long-term retirement planning for high-earning residents. Taxpayers may need to adjust their portfolio allocations and savings strategies if the 8.4% rate is enacted.

The takeaway

Residents should monitor legislative sessions to understand how potential tax hikes might impact their total annual tax liability. Adjusting financial planning now can help mitigate the effects of future changes to state income tax brackets.