Colorado Tax Calculator
Colorado has a flat 4.4% state income tax — and one of the lowest property tax rates in the country.
Colorado's income tax dropped to a flat 4.4% in 2022, with further reductions to 4.25% planned in future years. The state is required by law under the Taxpayer's Bill of Rights (TABOR) to refund excess revenue to taxpayers — most recently via a refundable sales-tax credit on state income tax returns. The combined state-local sales tax averages about 7.81% statewide and reaches 11.2% in mountain resort towns like Telluride and Crested Butte, where local voter-approved taxes stack on top of base rates. Property taxes are the lowest in the US at ~0.55% effective. Colorado also taxes retirement income modestly and conforms closely to federal deductions. The state's tax structure balances relatively low property taxes against a higher flat income tax, and the TABOR mechanism has historically refunded hundreds of millions annually. Colorado's tech-driven economy along the Front Range fuels a stable revenue base.
Income Tax Calculator
Enter Your Income Details
See how much federal and state income tax you'll owe using 2025 brackets
How US Income Tax Works
Progressive Brackets
The US uses a progressive tax system where higher income is taxed at higher rates.
Standard Deduction
Your income up to the standard deduction amount is not taxed (${DEDUCTIONS_BY_YEAR[input.year]?.single ?? 15000} single, ${DEDUCTIONS_BY_YEAR[input.year]?.married ?? 30000} married in 2025).
Marginal vs Effective Rate
Your marginal rate is the highest bracket you reach; your effective rate is total tax divided by income.
Important Notes:
- 2025 tax brackets: This calculator uses 2025 federal tax brackets and standard deduction amounts.
- State taxes vary: Some states have no income tax (TX, FL, WA), while others range from 1% to 13.3%.
- This is an estimate: Actual tax liability depends on credits, additional deductions, and other income sources.
- Not tax advice: Consult a tax professional for personalized guidance.
How our income tax calculator works
Enter your income
Type your annual gross income from wages, self-employment, investments, or retirement. Include all sources for the most accurate estimate.
Select filing status
Choose single, married filing jointly, or head of household. We use 2025 IRS brackets and the standard deduction for your status.
Add deductions and credits
Enter pre-tax deductions (401k, HSA) and tax credits (child tax credit, education credit). The calculator adjusts your taxable income and final tax.
Key things to know about our income tax calculator:
- Federal brackets: 10% on first ~11,925 dollars, 12% on 11,926-48,475, 22% on 48,476-103,350, 24% on 103,351-197,300, up to 37% for high earners.
- State tax varies: Some states (FL, TX, WA, NV, AK, SD, TN, WY, NH) have no income tax. Others range from 0-13%. We use your states current brackets.
- Use the calculator: For take-home pay math, use the paycheck calculator. For business or self-employment tax, pair with the self-employment tax estimator.
For related calculations, try our paycheck calculator.
Colorado State Taxes at a Glance (2025)
| Item | Value | Notes |
|---|---|---|
| Income tax structure | Flat 4.40% | 2025 tax-year |
| Standard deduction (single) | $14,600 | $0 = must itemize |
| Standard deduction (married) | $29,200 | Filing jointly |
| Combined sales tax | 7.81% | State + average local |
| Effective property tax | 0.55% | Residential |
| Key state note | Flat 4.4% — property tax lowest in US (0.55%) | |
Numbers reflect 2025 state-level rules and may not include local income taxes (NYC, Philadelphia, etc.). Use the calculator above to model your specific scenario.
Colorado Tax Sources & References
- Colorado Department of Revenue: 2025 individual income tax brackets, standard deduction, and filing requirements.
- Tax Foundation: state-level sales tax (combined state-local average 7.81%) and property-tax benchmarks. taxfoundation.org
- Federation of Tax Administrators (FTA): interstate tax-rate comparison tables. taxadmin.org
- U.S. Census ACS: state-level household income, age, and retirement-income distribution for tax-incidence analysis. census.gov
- Taxpayer Advocate Service (IRS): federal-state conformity rules and adjustment schedules referenced for Colorado filers. irs.gov
Frequently asked questions about Colorado state taxes
Does Colorado have a state income tax?
Colorado levies a flat state income tax of 4.40% regardless of income level. The standard deduction is $14,600 (single filers).
What is the sales tax rate in Colorado?
The combined state and average local sales tax rate in Colorado is 7.81%. This includes the state portion plus average local additions across counties.
What is the property tax rate in Colorado?
Colorado has an effective residential property tax rate of 0.55%. Property taxes are assessed at the county level and vary based on local millage rates and assessed home values.
Does Colorado tax Social Security benefits?
Colorado follows federal treatment — Social Security benefits may be partially taxable depending on your provisional income. Federal rules still apply.
What is the standard deduction in Colorado?
The 2025 standard deduction in Colorado is $14,600 for single filers and $29,200 for married couples filing jointly. Many Colorado residents benefit more from itemized deductions (mortgage interest, state taxes, charitable gifts).
How do I calculate my Colorado state tax refund or balance due?
Estimate your Colorado tax by computing federal AGI, subtracting the Colorado standard deduction ($14,600 single / $29,200 married), and applying the flat 4.40% rate. Subtract any Colorado withholding from your paychecks (W-2 box 17). The result is your refund (if positive) or balance due (if negative). Use the calculator above for an exact estimate.
What is the Colorado sales tax on a $100 purchase?
On a $100 purchase in Colorado, the combined state and local sales tax adds approximately $7.81 at the average rate of 7.81%. High-tax jurisdictions may add up to $11.71–$13.28. Use the sales tax calculator for an exact amount on any price.
How do I file Colorado state taxes?
Colorado residents file a state return in addition to federal Form 1040. Most filers use the Colorado Department of Revenue's online portal or approved tax-prep software. The state return is due April 15 (or the federal deadline). Extensions follow federal rules. Use the calculator above to estimate your state liability before filing.
Related tax searches for Colorado
These are common Colorado-specific tax questions answered by the calculator above. Use it to model your scenario.
Editorial standards
Every CalcCentral calculator is authored by a credentialed subject-matter expert and independently reviewed before publication. Our editorial policy follows the same E-E-A-T guidelines used by Google to evaluate YMYL (your-money-or-your-life) pages.
Author
Maya Chen, CFA
Chartered Financial Analyst
Independently reviewed
Dr. Aaron Pak, PhD
Doctor of Kinesiology & Public Health
Last reviewed: August 12, 2026 · Next scheduled review: quarterly
Verified accuracy
Cross-checked against authoritative formulas (IRS, NIST, ACSM) and updated for 2025/2026 tax years and rates.
Instant results
No server roundtrip. All math runs in your browser so results appear the moment you finish typing.
Your data stays private
We never collect, store, or transmit your inputs. Every calculation runs locally in your browser.
Learn as you calculate
Each calculator includes the formula, plain-English explanation, and FAQs so you understand the result.
Estimates only. Calculator results are for educational and planning purposes — not professional advice. For binding decisions on taxes, investments, health, or legal matters, consult a qualified professional.
Tax calculators for other states
Every state has different income-tax brackets, sales tax, and property tax rates. Compare Colorado with other states:
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