Douglas County

How the Douglas sale is run

The Treasurer's office in Castle Rock (100 Third Street, #120) does not hold a room auction. The whole sale is an internet auction administered by SRI Incorporated at zeusauction.com. The county's own timetable has three steps: the site opens for registration and research three weeks before the auction; on the day of sale, bidding opens at 8:00 a.m. Mountain Time; and on the day after the sale, batches begin closing at 9:00 a.m., one batch of roughly 250 liens every hour.

With 921 liens on the October 16 listing, that means about four batches on Friday, November 6. The Zeus listing shows the sale ending at 1:00 p.m. Central (noon Mountain) that day. Each lien has its own closing time, so check the batch of the liens you want rather than the end time of the whole sale.

Questions about the auction software go to SRI at 1-800-800-9588. Questions about a property or the taxes on it go to the Treasurer. Employees and officials of Douglas County, members of their immediate families and their agents cannot buy liens at this sale.

Registration: every year, and only with a U.S. taxpayer ID

Every bidder registers online with SRI, and the county insists on one point that trips up returning investors: if you bought liens in Douglas County last year, you still have to register again. Registration does not carry over.

A U.S. taxpayer identification number is required. The Treasurer warns that the IRS W-9, the tax lien certificates, the redemption payments and any refunds are all prepared from what you type at registration, so a misspelled name or the wrong entity is printed on every certificate you win. Banking information is also part of registration, because it is the account the county will debit when you win and credit when a lien redeems.

There is no deposit. You accept the terms and conditions online and you are ready to bid. That makes it easy to over-commit: there is no cap on what you can win apart from the money in the account on the day SRI pulls the ACH.

What you bid, what you pay, what earns interest

The minimum starting bid for each lien is the delinquent tax plus interest, advertising and fees, as shown on the auction site. Liens are won by bidding above that amount. The amount above the minimum is a premium, and the county is blunt about it: premiums are never returned and draw no interest; treat them as a cost of securing the lien.

The certificate itself earns nine points over the Federal Reserve discount rate as of September 1 of the sale year (C.R.S. 39-12-103). The Colorado Banking Commissioner set that rate at 13% for liens sold in 2026. If a property turns out to have been sold wrongfully and the sale is cancelled, the county pays two points above the discount rate instead, and never less than 8%.

Run your yield on the total cash out. A $1,500 lien bought with a $500 premium that redeems after a year returns $1,695 for the $2,000 you paid: a $305 loss, because the premium does not come back. At 13% a year, a premium of a third of the lien takes about two and a half years of interest just to recover. The Treasurer's letter describes Douglas as one of the ten most affluent counties in the nation, which is worth weighing: owners with equity to protect have every reason to redeem, and when they do the premium is the part you never get back.

Payment for every winning bid goes through SRI by ACH from your registered bank account. If the debit fails, you lose the liens you won and are barred from bidding on the site in all future auctions. All successful bids are final: no changes or cancellations once a lien is sold.

After the sale: redemptions, endorsements and the deed

SRI emails winning bidders, and the results stay online for at least five days after closing. When an owner redeems, the Treasurer's office processes it and pays you by ACH into your designated bank account; it is up to you to tell the Treasurer if that account changes.

If the owner does not pay the following year's taxes by August 1, you are offered the chance to pay them. Those taxes are endorsed onto your certificate and earn the same rate as the original lien. When several investors hold liens on one property, the endorsement goes to the first payment received.

If a lien is still unredeemed three years after the sale, the holder may apply for a Treasurer's Deed, with a $1,000 deposit to cover processing. Colorado has changed what that means. Since Senate Bill 26-144, effective June 1, 2026, a deed application leads to a public auction rather than a deed straight to the lienholder (C.R.S. title 39, article 11.5), and a lien sold from 2026 expires seven years after issue unless an application is pending (C.R.S. 39-11-148). The county's information sheet says the same: if no action is taken after seven years, the lien is cancelled.

Liens nobody buys are struck off to the county as County Held Liens. They can be bought after the sale from the Treasurer's office, and the county links the list from its Treasurer pages.

Researching 921 liens before November 5

The county calls this a buyer-beware sale: researching each property is the bidder's job. The advertised list is viewable on Zeus about three weeks before the auction, which leaves time to look up each parcel in the county's assessor records before you set a proxy bid.

Owners can still pay before the sale, so liens drop off the list until the morning of November 5. A lien on a list you downloaded earlier may no longer be for sale. Check the live listing before you bid.

Four ways people lose money here

1. 1. Assuming last year's registration still works

   Douglas requires every bidder to re-register for each annual sale on Zeus Auction.

2. 2. Counting the premium in your return

   Premiums are never returned and earn no interest. Only the lien earns the 13%.

3. 3. Leaving the bank account short

   There is no deposit, but every win is pulled by ACH. A failed debit loses the liens and bars you from future Zeus sales.

4. 4. Expecting the deed after three years

   Since SB 26-144, a deed application leads to a public auction, and an untouched 2026 lien is cancelled after seven years.