Boulder, Boulder County, Colorado Property Taxes
Property Taxes in Boulder, Colorado
Median Boulder, Colorado effective property tax rate: 0.56%, significantly lower than the national median of 1.02%, and higher than the Colorado state median of 0.50%.
Median Boulder, Colorado home value: $970,100
Median annual Boulder, Colorado tax bill: $5,536, $3,136 higher than the national median property tax bill of $2,400.
How are property taxes in Boulder calculated?
Property taxes in Boulder, Colorado are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Boulder's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Boulder, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Boulder, Boulder County, Colorado Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.56%
Estimate Property Tax Bill
$5,433
$5,041
$774
Average Annual Tax Savings
How Does the Boulder Property Tax Calculator Work?
Use this Boulder property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Boulder’s median effective tax rate of 0.56% — based on actual property records in Boulder County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Boulder’s median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Boulder: rates range from $4,004.00 in 80301 to $7,187.00 in 80304, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Boulder assessment — you only pay if we save you money.
About Boulder Property Taxes
About Property Taxes in Boulder, Boulder, CO
Boulder’s median effective property tax rate of 0.56% is lower than the Colorado state median of 0.50% and lower than the national median of 1.02%. This rate reflects the Boulder County base levy combined with local school district levies and metro districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Boulder. Homeowners in the 80305 ZIP code carry a median effective rate of 0.58%, while those in 80301 pay 0.54%. This spread — 0.04 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Boulder County. Understanding which part of Boulder you live in can make a meaningful difference to your annual tax bill.
Boulder homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before June 1, 2026.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Boulder, Boulder County, Colorado
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Boulder’s effective property tax rate to other cities in Colorado and the median property tax rates in Colorado and the U.S.
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Boulder Tax Rate
0.56%
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Boulder County Tax Rate
0.57%
Median Effective Colorado Tax Rate
0.50%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Boulder, Boulder County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80301 | 0.43% | 0.50% | 0.54% | 0.58% | 0.61% |
| 80302 | 0.47% | 0.51% | 0.55% | 0.58% | 0.62% |
| 80303 | 0.47% | 0.51% | 0.55% | 0.60% | 0.62% |
| 80304 | 0.42% | 0.52% | 0.57% | 0.60% | 0.61% |
| 80305 | 0.50% | 0.53% | 0.58% | 0.59% | 0.60% |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Assessment Values Across Boulder, Boulder County, Colorado
When examining property taxes in Boulder, Colorado, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Boulder County Assessor estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Boulder County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Boulder.
For example, the median home price in Boulder is $970,100, with tax bills ranging significantly across the county. 80304 has the highest median home price at $1,238,900.
Property Tax Assessment Values Across Boulder, Boulder County, Colorado
Source: Ownwell
$406,400
$931,350
$1,456,300
Median Boulder Market Value
$970,100
Median Boulder County Market Value
$722,400
Median Colorado Market Value
$519,879
Median United States Market Value
$235,294
Property Tax Assessment Values Across Boulder, Boulder County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80301 | $240,800 | $391,925 | $713,500 | $1,073,575 | $1,520,200 |
| 80302 | $415,700 | $703,830 | $1,114,400 | $1,714,900 | $2,631,330 |
| 80303 | $389,900 | $537,500 | $856,300 | $1,201,100 | $1,665,120 |
| 80304 | $182,745 | $677,650 | $1,238,900 | $1,794,300 | $2,587,250 |
| 80305 | $637,840 | $791,000 | $998,000 | $1,312,425 | $1,803,060 |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Bills Across Boulder, Boulder County, Colorado
Property tax bills in Boulder are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. For homeowners, that means a higher-valued home can lead to a higher tax bill, even when the tax rate stays the same. With a median home price of $970,100, Boulder homeowners often face substantial property tax obligations, especially compared with the national median property tax bill of $2,400.
The tax bill can vary widely across the city. The 25th percentile tax bill is $3,174, while the 75th percentile is $8,225 and the 90th percentile reaches $12,187. Median tax bills also differ by ZIP code, from $4,004 in 80301 to $7,187 in 80304.
Ownwell helps homeowners save by reviewing their property tax assessments and identifying opportunities to appeal overassessments. By challenging an unfair assessed value, Ownwell can help lower property tax bills and reduce what homeowners pay each year.
Median Boulder Tax Bill
$5,536
Median Boulder County Tax Bill
$4,202
Median Colorado Tax Bill
$2,732
Median United States Tax Bill
$2,400
Property Tax Bills Across Boulder, Boulder County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80301 | $1,322 | $2,091 | $4,004 | $6,269 | $8,722 |
| 80302 | $2,044 | $3,754 | $6,281 | $9,778 | $15,032 |
| 80303 | $1,920 | $2,801 | $4,805 | $6,947 | $9,598 |
| 80304 | $1,160 | $4,088 | $7,187 | $10,592 | $15,467 |
| 80305 | $3,503 | $4,545 | $5,654 | $7,461 | $10,362 |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | June 1 |
Links | |
|---|---|
| Boulder Tax Assessor | |
| Website | maps.boco.solutions |