Colorado Income Tax Brackets & Rates 2026

Colorado Income Tax Overview for 2026

Colorado (CO) imposes a flat income tax rate of 4.25% on all taxable income. Colorado uses a flat tax rate of 4.25% applied to federal taxable income with state-specific modifications.

For the 2026 tax year, Colorado residents must file both state and federal income tax returns. Your CO state tax is calculated on your state taxable income, which generally starts with your federal adjusted gross income (AGI) and applies state-specific adjustments and deductions. The Colorado standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly.

Your combined federal and CO effective tax rate depends on your total income, filing status, deductions, and credits.

SALT Deduction and Colorado Taxes in 2026

The State and Local Tax (SALT) deduction allows taxpayers who itemize on their federal return to deduct state and local taxes paid, including state income taxes and property taxes. Under the One Big Beautiful Bill Act (OBBBA), the SALT cap has been raised to $40,000 for the 2026 tax year, up from the $10,000 cap that was in place since 2018.

For Colorado residents, this is significant. With CO's moderate tax rates, most residents will find the $40,000 SALT cap more than sufficient to deduct all their state and local taxes. Taxpayers should compare their total SALT amount against the $40,000 cap to determine whether itemizing benefits them over the standard deduction.

The $40,000 SALT cap applies to the combined total of state income taxes (or sales taxes if elected), local income taxes, and property taxes. This cap is the same regardless of filing status. Use our SALT Deduction Calculator to determine your optimal strategy.

How Federal Taxes Apply to Colorado Residents

All Colorado residents are subject to federal income tax, which uses seven progressive brackets for 2026: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The federal standard deduction is $16,100 for single filers and $32,200 for married filing jointly. Under the OBBBA, new provisions include tax-free overtime pay, tax-free tips for service workers, and an additional $4,000 deduction for seniors aged 65 and older.

Your total tax liability as a CO resident combines your federal tax obligation with your Colorado state tax plus FICA taxes (Social Security at 6.2% and Medicare at 1.45%). Self-employed individuals in Colorado owe both the employee and employer portions of FICA (15.3% total) but can deduct the employer portion. Use our Federal Income Tax Calculator to compute your exact federal liability.

Tax Planning Tips for Colorado Residents

• Evaluate itemizing vs. standard deduction: With the $40,000 SALT cap, CO residents with high state income and property taxes should compare their itemized deductions against the standard deduction each year.
• Maximize retirement contributions: Contributing to a 401(k) or traditional IRA reduces both your federal and Colorado taxable income, providing a double tax benefit.
• Consider HSA contributions: If eligible, an HSA provides triple tax savings: deductible contributions, tax-free growth, and tax-free withdrawals for medical expenses. The 2026 limit is $4,300 for individuals.
• Review withholding: Use your combined federal and state tax liability to ensure proper withholding, avoiding both underpayment penalties and excessive refunds.
• Track estimated payments: If you have self-employment income or significant investment income, make quarterly estimated payments to both the IRS and Colorado to avoid penalties.

Colorado vs. Other States: Tax Comparison

Compared to the national landscape, Colorado's top rate of 4.25% is near the national average. Some states have no income tax (FL, TX, NV), while others like California (12.3%) charge significantly more. When comparing states, consider the full tax picture including property taxes, sales taxes, and cost of living, not just income tax rates.

Colorado Tax Overview

Colorado has a flat 4.25% income tax rate applied to federal taxable income with minimal state modifications. The state's Taxpayer's Bill of Rights (TABOR) amendment limits government revenue growth, sometimes resulting in tax refunds to all taxpayers when revenue exceeds the cap. Colorado property taxes are among the lowest in the nation at 0.49% average effective rate. The state also recently enacted a retail delivery fee and various enterprise fees.

Colorado has a state sales tax rate of 2.90% (up to 11.2% with local) and an average effective property tax rate of 0.49%. When combined with the income tax, these additional levies form the complete state tax picture that residents should evaluate. The Colorado tax authority (Colorado Department of Revenue) oversees all state tax administration and can be reached at (303) 238-7378 for questions about filing, payments, and account issues.

Understanding how Colorado's tax system interacts with federal taxes is critical for accurate financial planning. Your combined effective tax rate includes federal income tax (10% to 37%), Colorado state income tax, FICA taxes (7.65% for employees), and any applicable local taxes. Proper planning across all these layers can save thousands of dollars annually.

Colorado Tax Deductions and Credits

Colorado conforms to the federal standard deduction and starts with federal taxable income. The state offers a child tax credit ($800 per child for eligible families), a childcare contribution credit, a historic preservation credit, a conservation easement credit, an alternative fuel vehicle credit, and a partial pension/annuity subtraction for those 55-64 ($20,000) and full exemption for those 65+ ($24,000). Colorado also allows charitable contribution deductions for non-itemizers.

In addition to state-specific benefits, Colorado residents can take advantage of federal tax deductions and credits. For the 2026 tax year, key federal provisions include the standard deduction ($16,100 single, $32,200 married filing jointly), the child tax credit (up to $2,000 per qualifying child), the earned income tax credit for low-to-moderate income workers, and the $40,000 SALT deduction cap under the OBBBA. Colorado state income taxes are included in the SALT calculation, so residents paying significant state income tax should evaluate whether itemizing produces a larger deduction than the standard deduction.

Taxpayers should also explore retirement-related tax benefits available to Colorado residents. Contributions to 401(k) plans (up to $23,500 for 2026, plus $7,500 catch-up for age 50+) and traditional IRAs (up to $7,000, plus $1,000 catch-up) reduce both federal and state taxable income. Health Savings Account (HSA) contributions provide a triple tax benefit: tax-deductible contributions, tax-free growth, and tax-free withdrawals for medical expenses.

Tax Tips for Colorado Residents

Colorado residents may receive a TABOR refund in years when state revenue exceeds constitutional limits; check your eligibility annually. File through Revenue Online for free. Colorado starts with federal taxable income, so any changes to your federal return will affect your Colorado return. The state offers a Sales Tax Refund for low-income residents, even if they owe no income tax. If you're 55 or older, claim the retirement income subtraction to reduce your Colorado tax. Keep records of any enterprise fees paid, as some may be deductible.

For the 2026 tax year, Colorado residents should also be aware of key provisions under the OBBBA. Overtime pay (beyond 40 hours per week) is exempt from federal income tax, tips earned by service workers are federally tax-free, and seniors age 65+ receive an additional $4,000 federal deduction. These provisions apply to CO residents regardless of state tax status and can significantly impact take-home pay and total tax liability.