Weld County tax sales, Colorado

Verified

Weld County sells online through RealAuction at weld.coloradotaxsale.com, with new investor registration opening in October and closing before the sale, an ACH authorization and a minimum deposit of 10 percent of planned spending taken at registration, and a separate Investor Registration Form packet filed with the Treasurer's office. Weld is the county in this set that publishes a seven year life: tax lien certificates issued after January 1, 2026 expire after seven years, a warning printed twice on the Treasurer's sale page. Its delinquent list was published in the Greeley Tribune on September 30, October 7 and October 14, 2026. The Treasurer's pages read state the interest formula (nine percent above the federal discount rate) rather than the 2026 number; the 13 percent figure used on this page is the statewide 2026 rate under CRS 39-12-103 in the verified state frame. No post sale payment deadline for winning bidders was published on the pages read, so it is marked unverified here.

Selling office: Weld County Treasurer and Public Trustee Brigitte Grimm

Next sale: The 2026 tax lien sale was held Thursday, November 5, 2026 online and had already run as of November 9, 2026; no dated 2027 sale was published on the Treasurer's pages read. The Treasurer's Tax Lien Sale Information page states the next tax lien sale will be November 5, 2026, and the 2026 sale publication confirms a public auction by means of the internet at weld.coloradotaxsale.com on Thursday, November 5, 2026, for liens on 2025 and prior year taxes. Because November 5, 2026 is before the November 9, 2026 read date, the 2026 sale is stated here as completed. New investor registration for the 2026 sale began October 9 at 8 a.m. with RealAuction and ended October 31 at 2 p.m. Watch the Treasurer's sale page for the 2027 date.

Weld pairs an early November online sale with a hard seven year certificate life for certificates issued after January 1, 2026, the shortest horizon stated in this set. Treasurer and Public Trustee: Brigitte Grimm, Greeley, phone (970) 400-3290; office hours 7:30 a.m. to 4:30 p.m.

Dates and deadlines

Next sale	The 2026 tax lien sale was held Thursday, November 5, 2026 online and had already run as of November 9, 2026; no dated 2027 sale was published on the Treasurer's pages read
The sale	The annual sale is held online through RealAuction to collect unpaid property taxes. The 2026 sale was held on Thursday, November 5, 2026 at weld.coloradotaxsale.com and had already run as of November 9, 2026. The individual lien amount includes taxes, delinquent interest, advertising, internet auction and certificate fees. No tax lien may be sold to county officials or employees or their immediate family, under CRS 39-11-151. Tax lien certificates issued after January 1, 2026 expire after seven years.
The list	Three weeks before the sale, a list of properties with the potential to go to sale is available to view at RealAuction, updated daily until the sale date, per the Treasurer. The 2026 delinquent list for tax year 2025 was published in the Greeley Tribune on September 30, October 7 and October 14, 2026, under CRS 39-11-102. Owners could avoid the sale by paying with certified funds received in the Treasurer's office on or before 2:00 p.m. on Wednesday, November 4, 2026.
Registration	All potential bidders must register online before the sale date at the Weld Official Tax Certificate Auction Site on RealAuction, completing an IRS W-9, ACH depository requirements and a buyer beware document. New investor registration for 2026 began October 9 at 8 a.m. and ended October 31 at 2 p.m. A separate Investor Registration Form packet must also be completed and returned to the Treasurer's office by email, mail, drop box or in person.
Bidding and the certificate	Bidding is premium bidding under CRS 39-11-115(1): generally a successful bidder pays a premium above the tax lien amount, and interest is paid on the tax lien but not on the premium. The interest amount is determined September 1 each year at nine percent above the federal discount rate, which for the 2026 sale is the statewide rate of 13 percent under CRS 39-12-103. The winner receives a certificate of purchase, a lien against the property, not the property. The sale is a buyer beware sale, per the Treasurer.
Redemption	The owner of record, their agent, or any other person with a legal or equitable claim may redeem at any time subsequent to the sale and up to the issuance of a treasurer's deed, paying the Treasurer the delinquent taxes, delinquent interest, advertising fees, late fees and any other additional costs; redemption payments must be made with certified funds (the Treasurer lists cash, cashier's check and credit card), postmarks are not accepted, and interest is calculated monthly. The holder may endorse subsequent taxes onto the certificate under CRS 39-11-119 at the same rate; the Treasurer accepts subsequent payments beginning August 1, with a reminder email in the third week of July. After three years, a lawful holder may apply for a public auction of a Certificate of Option for Treasurer's Deed under CRS 39-11.5-102; the Weld deposit is $900 for real and manufactured home property and $4,500 for mineral property, the process takes two to six months, and a treasurer's deed is an unmarketable title for seven years, per the Treasurer's deed page.
Unsold liens	The Treasurer's sale page carries a County Held Liens section: county held liens are available for purchase from the Treasurer's office, with a $5.00 assignment fee added to each lien purchased. Buyers should contact the office before submitting certified funds to verify the lien is still available and the current total, and new investors must complete the Investor Registration Forms and mail them to P.O. Box 458, Greeley, CO 80632.
Format	Online only: RealAuction, at weld.coloradotaxsale.com
Selling office	Weld County Treasurer and Public Trustee Brigitte Grimm

Sources: Weld County Treasurer, Tax Lien Sale Information. Weld County Treasurer, 2026 Tax Lien Sale Publication. Weld County Treasurer, Deed Auction Information. Confirm with the selling office before relying on any date on this page: sales move, terms change, and parcels are pulled up to sale day.

Research Weld County parcels before you bid

A sale list gives you the parcels, the date, and the opening terms. It does not give you the owner, the value, or the rest of the picture: liens, foreclosure status, and parcel history. PropertyRadar is the data platform for that layer. It carries owner records, assessed and market values, foreclosure and tax data, and property history for parcels across Weld County, searchable by address, owner, or county, including parcels that never reach a sale list.

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How Colorado tax lien sales work

Unpaid taxes become a lien, and the lien is what sells. Property taxes in Colorado are a lien on the property, and delinquent interest accrues at 1 percent per month under CRS 39-10-104.5. When taxes stay unpaid, the county treasurer publishes the delinquent list once a week for three weeks (39-11-102) and sells the tax lien at the annual sale under Title 39, Article 11. What the buyer receives is a certificate of purchase: a lien position against the property, not the property, not a deed, and no right to enter or use it.
The sale runs every fall, and the statute sets the outer date. The sale must begin no later than the second Monday in December (39-11-109), and each treasurer fixes the day. Counties in this set sell from late October into December, most of them in November. Most of the large counties sell online through a vendor the treasurer names; some still sell in person, and the county page says which.
Bidding is a premium, and the premium is spent money. Under 39-11-115(1) the lien goes to the person who pays the taxes, delinquent interest and fees and bids the largest amount on top of that sum. The excess, the premium, is credited to the county general fund. It earns no interest, and it is not returned if the owner redeems. Competition in Colorado raises the price of the lien without raising its return by a cent.
The rate is fixed by statute, and redemption is the normal exit. The certificate earns the redemption rate in 39-12-103: nine percentage points above the federal discount rate as of September 1, rounded to the nearest whole percent. For the 2026 sale that rate is 13 percent. The owner, or another interested party, may redeem at any time before a treasurer's deed is issued, and the holder may pay later delinquent taxes and endorse them onto the certificate at the same rate. Most certificates end in redemption.
The deed runs through a public auction now. Colorado used to hand the treasurer's deed to the certificate holder on application after three years. That ended July 1, 2024 under HB 24-1056, and SB 26-144 reenacted the replacement process as Article 11.5 effective June 1, 2026. After August 1 of the third calendar year following the sale, the lawful holder applies, and the treasurer auctions a certificate of option for treasurer's deed: the opening bid covers what is owed to the holder plus treasurer fees and costs, any overbid belongs to the former owner, and if no qualifying bid is made and paid, the lawful holder is deemed the option purchaser and the deed issues to that purchaser. Liens nobody buys are struck off to the county and can later be bought by assignment.

How bidding works in Weld County

Register online with RealAuction at weld.coloradotaxsale.com before the sale: registration includes an IRS W-9, an ACH authorization and acceptance of a buyer beware document, and at registration the bidder makes a deposit of a minimum of 10 percent of what they plan to spend. For the 2026 sale, new investor registration began October 9, 2026 at 8 a.m. and ended October 31, 2026 at 2 p.m. A separate Weld County Investor Registration Form packet is filed with the Treasurer's office. Questions on the sale go to RealAuction at 1-877-361-7325.

The premium is the price, and it buys nothing. Every dollar of premium goes to the county general fund the moment the lien sells. A small lien won with a large premium can pay back less than the taxes were worth even at a 13 percent headline rate, because the rate applies only to the certificate amount. Model premium as a fee you pay for the right to earn 13 percent on somebody else's tax bill, because that is what it is.
The certificate is not the property. No possession, no rents, no right to enter, and no deed on application. Since 2024 the deed runs through a public auction where the owner's equity is bid for openly; buyers who need the property itself on a schedule should be reading the deed state pages, not this one.

Terms: what a bid actually costs

Deposit, Weld County	A deposit of a minimum of 10 percent of what the bidder plans to spend for tax liens is made at registration through the ACH authorization, per the Treasurer's registration section. The deposit is a minimum percentage, not a fixed dollar amount, and the Treasurer's pages read publish no separate deposit deadline beyond the October 31, 2026 registration close for the 2026 sale.
Payment, Weld County	Registration sets up ACH depository requirements so the bidder can make payments for tax liens purchased, per the Treasurer. No post sale payment deadline or final settlement window for winning bidders was published on the Treasurer's pages read, and none is claimed here; the settlement terms are set in the RealAuction sale rules.
What is sold	A certificate of purchase: a lien on the property for the delinquent taxes, delinquent interest and fees. Not the property, not a deed, and no right of possession. A deed exists only at the end of the Article 11.5 public auction process, years later, if the owner never redeems.
The bid	The taxes, delinquent interest and fees, plus a premium bid on top. Under CRS 39-11-115(1) the premium is credited to the county general fund: it earns no interest and it is not refunded when the owner redeems. The premium is a cost of winning, never part of the return.
The rate	Fixed by statute, not bid. Under CRS 39-12-103 the rate is nine percentage points above the federal discount rate as of September 1, rounded to the nearest whole percent, effective October 1. For the 2026 sale the rate is 13 percent, and it applies to the taxes and fees in the certificate amount and to subsequent taxes the holder endorses, never to the premium.
Redemption	At any time before a treasurer's deed is issued, through the county treasurer, by paying the certificate amount plus interest at the certificate rate and the statutory fees. The holder of a redeemed certificate is paid by the treasurer; the premium stays with the county.
The deed path	Article 11.5, as reenacted by SB 26-144 effective June 1, 2026. After August 1 of the third calendar year following the sale, the lawful holder may apply for a treasurer's deed; the treasurer auctions a certificate of option for treasurer's deed, with an opening bid of the amount owed to the holder plus treasurer fees and costs, the premium excluded. Any overbid is the former owner's surplus. If no qualifying bid is made and paid, the lawful holder is deemed the option purchaser and the deed issues to that purchaser. County pages state a treasurer's deed is unmarketable title for at least seven years.
Certificate life	A certificate is not perpetual, and the deed window does not open early: the application cannot be made before August 1 of the third calendar year following the sale, and county treasurers state that certificates from sales on or after January 1, 2026 expire seven years after the sale if the deed process is never begun.

Unsold liens: county held certificates

Liens that draw no bid are struck off to the county under CRS 39-11-108. Weld County's Treasurer publishes a County Held Liens channel on the sale page: county held liens can be purchased through the Treasurer's office, a $5.00 assignment fee is added to each lien purchased, and buyers must contact the office at (970) 400-3290 before submitting certified funds to verify availability and the current total. Investors who are not already registered complete the Investor Registration Forms and mail them to P.O. Box 458, Greeley, CO 80632.

Before you bid

Model the premium before the rate. Run the redemption case with your real premium included: certificate amount, plus premium, against 13 percent on the certificate amount alone over the likely redemption window. Liens that only work at a zero premium do not work.
Check whether the sale is already over. Colorado's season is short and most of it lands in a few November weeks. Several sales in this set had already closed before these pages were checked. The treasurer's sale page is the live word on dates, registration, and deposits.
Subsequent taxes are part of the position. A holder can pay later delinquent taxes on the parcel and endorse them onto the certificate at the same rate. Budget for carrying the position across the three year deed window, not just for buying it.
Set the maximum before the sale opens. The free Max-Bid Calculator below works backwards from your exit value to the highest certificate amount you can carry, with the premium and costs shown.

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