Taxes in Boulder, Colorado
Complete tax guide for Boulder, CO. State income tax up to 4.4%, 0.54% property tax, 8.85% sales tax. Calculate your total tax burden.
Answer first
Taxes in Boulder, CO: income, FICA, property, and sales tax
For wage-income planning, this page estimates federal income tax, Colorado state income tax, and FICA. It also shows property-tax and sales-tax estimates because local household tax burden depends on address-level property assessments, sales-tax districts, exemptions, and item categories.
State Income Tax
4.4%
Colorado
Property Tax
0.54%
Effective rate
Sales Tax
8.85%
Combined rate
Tax Burden
High
Boulder, CO Tax Overview
University of Colorado; very high home prices for Colorado
Population
105,112
Median Income
$74,340
Cost of Living
145.2 (100 = avg)
State Income Tax
4.4%
Median Home Price
$745,000
Boulder Tax Calculator
Pre-filled with Boulder median: $74,340
Total Tax Burden in Boulder
$15,823
Take-Home: $58,517 · Effective Rate: 21.28%
Federal Tax
$7,525
10.12% eff.
CO State
$2,611
3.51% eff.
FICA
$5,687
7.65% eff.
Take-Home
$58,517
78.72% kept
Tax Breakdown
| Item | Annual | Monthly |
|---|---|---|
| Gross Income | $74,340.00 | $6,195.00 |
| Federal Income Tax | -$7,524.80 | -$627.07 |
| Colorado State Tax | -$2,610.96 | -$217.58 |
| Social Security (6.2%) | -$4,609.08 | -$384.09 |
| Medicare (1.45%) | -$1,077.93 | -$89.83 |
| Take-Home Pay | $58,517.23 | $4,876.44 |
Property Tax in Boulder
Median Home
$745,000
Annual Tax
$4,023
Monthly Tax
$335
Effective Rate
0.54%
Sales Tax in Boulder
Combined Rate
8.85%
State Portion
2.9%
Local Portion
~5.95%
The combined sales tax rate in Boulder is 8.85%, which is above the national average of 7.53%. On a $100 purchase, you would pay $8.85 in sales tax.
Sales and use tax can vary by exact address, district, item category, exemptions, and effective date. Treat this city rate as a planning estimate and verify large purchases with the official state sales-tax lookup or local tax authority.
Tax Burden Comparison
| Tax Type | Boulder | Colorado Avg | National Avg |
|---|---|---|---|
| Income Tax | 4.4% | 4.4% | 4.6% |
| Property Tax | 0.54% | ~0.54% | 1.1% |
| Sales Tax | 8.85% | ~8.85% | 7.53% |
| Overall Burden | High | — | Moderate |
About Taxes in Boulder
Boulder has a population of approximately 105,112 residents with a median household income of $74,340. The estimated cost of living index is 145.2 (45.2% higher than the national average of 100).
Local context: University of Colorado; very high home prices for Colorado
Tax burden classification: High. Effective combined tax rate of 30.1% includes federal, state, FICA, property, and sales taxes for a typical Boulder household.
Official Tax Resources for Colorado
For authoritative Colorado tax forms, filing deadlines, and the latest legislative updates, consult these official government resources:
- Colorado Department of Revenue, official state revenue agency
- Colorado Individual Income Tax Forms, current tax year forms and instructions
- IRS Federal Tax Forms and Instructions, federal income tax filing
Tax Saving Tips for Boulder Residents
- Colorado's top income tax rate of 4.4% is competitive. You may still benefit from maximizing 401(k) contributions ($24,500 limit) to reduce your taxable income at both state and federal levels.
- Property tax in Boulder (0.54%) is below LevyIO's rounded national benchmark of 1.1%. This makes homeownership more affordable here relative to property tax burden.
- The combined sales tax rate of 8.85% is relatively high. Consider making large purchases in lower-tax jurisdictions or online retailers that do not charge local tax rates.
- Use a Health Savings Account (HSA) if eligible. Contributions are tax-deductible ($4,400 individual, $8,750 family), growth is tax-free, and withdrawals for medical expenses are tax-free.
Find Your Local Tax Authority in Boulder
The 0.54% property tax rate shown above is a city-profile effective estimate. Your actual Boulder property tax bill is set by your county assessor and may include additional levies from your school district or special taxing and assessment districts. Use these official lookup tools to confirm exact rates for your specific address:
Look up the county your Boulder address belongs to and find your assessor's office:
- • NACo County Explorer, search by address
- • USA.gov, Colorado local govt directory
School districts add their own millage rate to property tax:
- • NCES District Locator, federal database
- • NCES School Locator (EDGE)
Special taxing or assessment districts (for example utility, fire, library, or improvement districts, depending on state law) can add levies in parts of Colorado:
- • Census, Census of Governments
- • Check your tax bill for line items beyond county + school district
Disagree with your assessment? You can appeal:
- • Property Tax Appeal Guide
- • Appeal deadlines vary by state and county; check the deadline printed on your assessment notice
Why this matters: Two homes valued the same in Boulder can pay different property tax depending on which school district and special districts they fall within. Always verify with your specific address, the address-level rate can be higher or lower than the city estimate shown here.
Other Cities in Colorado
Denver
ModerateColorado Springs
ModerateAurora
ModerateFort Collins
ModerateLakewood
ModerateThornton
ModerateArvada
ModerateSources & Methodology
Federal, FICA, and state income-tax inputs on this page follow official 2026 sources. City-level property-tax rates, median values, cost-of-living index, and burden labels are LevyIO modeled estimates, and local income-tax and sales-tax rates should be confirmed with the local tax authority. Calculations follow the IRS-published 2026 federal tax brackets, FICA rates (6.2% Social Security up to $184,500 wage base, 1.45% Medicare), and Colorado state tax provisions. Property tax estimates use Boulder's median home value of $745,000and the local effective property tax rate of 0.54%.
- • Federal tax brackets and standard deductions: IRS.gov
- • State income tax rates and brackets: Colorado Department of Revenue
- • Median household income, home value, and demographics: U.S. Census Bureau ACS
- • Cost of living index: LevyIO modeled estimate (100 = national average); not an official BLS index. Household spending context: U.S. Bureau of Labor Statistics Consumer Expenditure Surveys
- • National average sales tax (7.53%): Tax Foundation, State and Local Sales Tax Rates, Midyear 2026 (population-weighted combined average). Property-tax (1.1%) and state income-tax (4.6%) national figures are rounded LevyIO planning benchmarks.
Disclaimer: Estimates are for informational purposes only. Actual tax liability depends on filing status, deductions, credits, and individual circumstances. Consult a licensed tax professional or your state revenue agency for binding tax guidance.
Reviewed by LevyIO Tax Research Team · Published 2026-01-15 · Last updated 2026-05-27
Calculate Your Full Colorado Tax Burden
See detailed state tax brackets, FICA breakdown, and compare to neighboring states.
Reviewed data sources
Reviewed May 27, 2026. Calculations use current public tax guidance and published source data.
1. Enter the tax scenario
Use the filing status, income type, state, payroll, deduction, credit, or transaction details that match the real case.
2. Review assumptions
Check the visible formula context, source notes, related calculators, and federal or state limits before relying on the estimate.
3. Verify before filing
Confirm final tax positions with IRS guidance, state revenue agencies, payroll records, brokerage forms, or a qualified tax professional.
Planning estimate, not tax advice
LevyIO calculators are educational planning tools. Actual federal, state, payroll, property, sales, and local tax results can change with filing status, credits, deductions, residency, employer withholding, address-level rates, and current forms. Verify final filing positions with IRS or state guidance, payroll records, tax software, or a qualified tax professional.
Frequently Asked Questions
What are the tax rates in Boulder, CO?
Boulder, Colorado has a state income tax rate up to 4.4%. The property tax rate is 0.54% and the combined sales tax rate is 8.85%. University of Colorado; very high home prices for Colorado
How much is property tax in Boulder?
The effective property tax rate in Boulder is 0.54%. On the median home price of $745,000, this equals approximately $4,023 per year or $335 per month. This is below LevyIO's rounded national benchmark of 1.1%.
What is the sales tax rate in Boulder?
The combined sales tax rate in Boulder is 8.85%, which includes both state and local components. This is above the Tax Foundation midyear 2026 national average combined rate of 7.53%.
How does Boulder's tax burden compare to other cities?
Boulder has a high overall tax burden. The effective total tax rate for a median-income household is approximately 30.1%. The combination of 4.4% state income tax, 0.54% property tax, and 8.85% sales tax determines the total burden. Estimated cost of living index is 145.2 (100 = national average).
Are there any local taxes in Boulder?
Boulder does not impose a separate local or city income tax. Residents pay the state income tax of 4.4%, federal income tax, and FICA (Social Security and Medicare). University of Colorado; very high home prices for Colorado