Amendment 87 could drop Colorado into the bottom 10 for tax competitiveness

November 10, 2026

By Nash Herman | Commentary, Complete Colorado

The Tax Foundation’s 2027 State Tax Competitiveness Index ranks Colorado as the 33rd most competitive in the nation—up from 34th last year. 

The modest improvement came less from changes in Colorado tax policy and more from the state’s immediate conformity to federal tax changes. 

But with Amendment 87, the progressive income tax, now on the books, Colorado could move down significantly by next year. 

Let’s see what this means for the future. 

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