2025 Colorado State Income Tax Rates For Individuals. Review the latest income tax rates, thresholds and personal allowances in colorado which are used to calculate salary after tax when factoring in social security contributions, pension contributions and other salary taxes in colorado Here you can find how your colorado based income is taxed at a flat rate.

For individuals, the income tax rates on ordinary income (as distinguished from capital gains) start at 10% and increase up to 37% as your income tax bracket increases. Colorado standard income tax rate to remain at 4.40% until october 2025.