Boulder County, CO property tax
Census ACS 2023 5-year estimates · updated 2026-09-20
The median effective property tax rate in Boulder County is 0.54%, above the Colorado median of 0.49% and below the national median of 0.98%. The median homeowner pays $3,821 a year on a home worth $713,900.
- Effective rate
- 0.54%
- Median annual bill
- $3,821
- Median home value
- $713,900
- Rank in Colorado
- 5of 61
Estimated annual bill by home value
| Home value | Estimated bill | Per month |
|---|---|---|
| $200,000 | $1,080 | $90 |
| $300,000 | $1,620 | $135 |
| $400,000 | $2,160 | $180 |
| $500,000 | $2,700 | $225 |
| $750,000 | $4,050 | $338 |
| $1,000,000 | $5,400 | $450 |
Boulder County compared with Colorado and the US
| Area | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Boulder County | 0.54% | $3,821 | $713,900 |
| Colorado median | 0.49% | $2,448 | $502,200 |
| United States median | 0.98% | $2,969 | n/a |
Rates and medians: U.S. Census Bureau, ACS 2023 5-year estimates, tables B25103 and B25077. Effective rate is median taxes paid divided by median owner-occupied home value.
Frequently asked questions
What is the property tax rate in Boulder County, CO?
The median effective property tax rate in Boulder County is 0.54% of home value, above the Colorado median of 0.49% and below the national median of 0.98%. The median homeowner pays $3,821 a year on a median home value of $713,900 (Census ACS 2023 5-year).
How much is property tax on a $400,000 house in Boulder County?
About $2,160 per year at the county's median effective rate of 0.54%, before exemptions. The exact bill depends on the city, school district and special districts that serve the parcel, so treat this as a planning estimate.
How does Boulder County compare with the rest of Colorado?
Boulder County ranks 5 of 61 Colorado counties by effective rate. The Colorado median is 0.49% and the median bill is $2,448.