Colorado Income Tax Calculator
Calculate your Colorado state income tax alongside federal tax. See the full bracket breakdown, effective rate, and combined tax liability.
Last updated: · Tax Foundation (2025 state brackets) + IRS Rev. Proc. 2025-32 (2026 federal)
On a $75,000 salary in Colorado (single filer, 2025), your estimated state income tax is $3,300.00 (4.4% effective rate). Combined with federal tax of $7,670.00, your total income tax is $10,970.00 (14.6% combined effective rate). Colorado uses a flat tax rate of 4.40%. Source: Tax Foundation, state revenue department.
Flat rate of 4.40% (reduced from 4.55% in 2024). Tax is calculated on federal taxable income with state modifications.
Federal estimates use 2026 IRS brackets. State estimates use 2025 state rate data.
Results
Colorado Tax Bracket Breakdown
| Rate | Range | Tax |
|---|---|---|
| 4.40% | $0 – ∞ | $3,300.00 |
| Total Colorado Tax | $3,300.00 | |
Compare Colorado with Other States
How This Is Calculated
Colorado levies a flat income tax rate of 4.40% on all taxable income.
Data source
State bracket data from the Tax Foundation (2025 State Individual Income Tax Rates and Brackets). Cross-referenced with the Colorado revenue department. Federal brackets from IRS Rev. Proc. 2025-32 (2026).
Frequently Asked Questions
- How much is Colorado income tax on $75,000?
- On a $75,000 salary in Colorado, you would owe approximately $3,300.00 in state income tax (4.4% effective rate) plus $7,670.00 in federal income tax, for a combined total of $10,970.00 (14.6% combined effective rate).
- What is the Colorado income tax rate for 2025?
- Colorado has a flat income tax rate of 4.40%. All taxable income is taxed at the same rate. Flat rate of 4.40% (reduced from 4.55% in 2024). Tax is calculated on federal taxable income with state modifications.