For information about Boulder County Ballot Measures, visit the county’s Ballot Measures website.

Tax Lien Sale

Certified funds are now required for all delinquent tax payments. Online tax payments have been disabled for the remainder of the year. You may still view tax account information, including copies of receipts, online.

Tax Lien Sale

2026 Sale Dates

Real Property Tax Lien Sale

Our tax lien sale will be held Nov. 13, 2026.
Registration begins at 7:30 a.m.
The sale begins at 8:30 a.m.
We have a list of properties advertised for sale. This list is updated each Friday.

Tax Lien Sale Briefing

We will hold a session for people who need more information about our tax lien sale. This briefing is for information only and attendance is not required.

Monday, Nov. 3
6 p.m.
Commissioners’ Hearing Room
1325 Pearl St Boulder
Third Floor

Mobile Home Tax Lien Sale

Delinquent mobile home taxes will be struck off to the county instead of being sold at auction.

Tax Lien Sale Information

For questions about parking, registration, or anything else, we have answers to common questions.

Tax Lien Interest Rate

The interest rate for liens sold in 2026 is 13% per year.

Related Links

Prior Year Sale Information

Category11/5/202111/16/202211/17/202311/8/202411/14/2025
Interest rate9%12%15%15%14%
Investors at sale4237322925
Properties at auction402446488591520
Premium average7.5%7.6%7.0%6.0%5.6%
Taxes collected$2,918,713.39$2,470,112.64$2,329,830.56$3,800,832.11$5,676,649.59

Contact Us

Treasurer's Office

Phone: 303-441-3520
Fax: 303-441-3598

treasurer@bouldercounty.gov

eforeclosures@bouldercounty.gov

Mailing Address

P.O. Box 471
Boulder, CO 80306

Boulder


1325 Pearl St.
Boulder, CO 80302
1st Floor
Hours: 8 a.m. - 4:30 p.m.
Monday - Friday

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Longmont


515 Coffman St.
Longmont, CO 80501
Suite 113
Hours: 8 a.m. - 4:30 p.m.
Mondays only

Lafayette


1755 S. Public Road
Lafayette, CO 80026
Office closed until late January 2027