Colorado Wealth Tax Push: Signature Drive Begins for 2026 Graduated Tax Ballot

The launch of a signature-gathering campaign for a graduated income tax in Colorado marks a pivotal moment in the state's fiscal history. For decades, Colorado has maintained a flat income tax—currently set at 4.4%—which has been a cornerstone of its appeal to both high-net-worth individuals and corporate entities. By initiating a push for the 2026 ballot, proponents are signaling a direct challenge to the state's conservative fiscal architecture, specifically the Taxpayer's Bill of Rights (TABOR), which mandates voter approval for any tax increase. This move reflects a growing national trend where states, previously seen as low-tax havens, are re-evaluating their revenue models to address widening wealth gaps and chronic underfunding in public sectors like education and infrastructure.

The proposed measure aims to introduce higher tax brackets for individuals earning above specific thresholds, likely starting at $300,000 or $500,000 annually. From a market perspective, the implications are twofold. First, there is the risk of capital flight. Colorado has seen a significant influx of wealth over the last decade, particularly in the tech and aerospace sectors of the Front Range and the luxury real estate markets of the high country. Critics, including the Colorado Chamber of Commerce, argue that a graduated tax would diminish the state's competitive edge against neighbors like Wyoming and Nevada, which have no state income tax. They contend that high earners, who are highly mobile, may choose to relocate their primary residences or business headquarters to avoid the increased tax burden.

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The proposed measure aims to introduce higher tax brackets for individuals earning above specific thresholds, likely starting at $300,000 or $500,000 annually.

Conversely, proponents argue that the current flat tax is inherently regressive, placing a disproportionate burden on lower-income residents while failing to capture the gains of the state's booming upper class. The revenue generated—estimated in the hundreds of millions or even billions depending on the final bracket structure—is earmarked for critical public services. Education funding in Colorado has consistently lagged behind national averages, and the state faces an acute affordable housing crisis. By targeting the top 3-5% of earners, advocates believe they can stabilize the state's budget without impacting the vast majority of the electorate, a strategy that has seen mixed success in other states like Massachusetts and Illinois.