Boone County tax sales, Missouri

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Boone County publishes the fullest official sale record in Missouri, a single Collector page that runs from the affidavit to the deed checklist to the state's cleanest post-third offering process. Two Boone rules punish careless bidders precisely: payment is due immediately at the close of the sale and an unpaid bid draws a penalty of 25 percent of the bid plus a prosecuting attorney's fee; and a purchaser who fails to obtain a collector's deed within 18 months of the certificate loses the lien entirely. The county's dated sale history on the page runs 2006 through 2026, and the 2026 sale was held August 24, 2026 with the sold properties listed.

Selling office: Boone County Collector

Next sale: 2026 sale held Monday, August 24, 2026, 10:00 AM, County Commission Chambers, Roger B. Wilson Government Center. The Collector's page lists the 2026 sold properties. The next sale is the fourth Monday in August 2027, August 23, 2027, same chambers and hour on the county's unbroken annual pattern (dated history 2006 to 2026).

The 2026 sale is complete, with sold properties listed on the Collector's page. Next annual sale: the fourth Monday in August 2027, August 23, 2027. The deed clock from the 2026 sale is the live item for buyers: the 18 month deadline to complete the s. 140.405 notice process and take the deed runs from the date on the certificate.

Dates and deadlines

Next sale	2026 sale held Monday, August 24, 2026, 10:00 AM, County Commission Chambers, Roger B. Wilson Government Center
The list	Published in a local newspaper for three consecutive weeks before the sale and posted online at boonemo.gov/collector.
The affidavit	Every buyer or agent signs the non-delinquency affidavit, available at the Collector's office or at the sale site immediately before the sale. A false affidavit may invalidate the purchase. Nonresidents of Missouri may not bid unless special arrangements are made with the Collector before the sale.
The sale	The Collector conducts the sale with an auctioneer; buyers must be present to bid. Bidding begins at the amount of taxes, penalties and sales costs.
Payment	The total bid must be paid to the Collector's office immediately at the close of the sale: cashier's check, money order, bank draft, or cash. Personal checks and credit or debit cards are not accepted. An unpaid bid draws a penalty of 25 percent of the bid plus a prosecuting attorney's fee.
The certificate	The Collector issues, records and mails the certificate of purchase. The purchaser buys a lien, not ownership or possession.
Redemption	Within one year of the sale date, the owner or any interested party may redeem: the bid amount plus 10 percent annual interest on the amount of sale less any surplus, plus subsequent years' taxes paid at 8 percent annual interest, plus the purchaser's reasonable title search and mailing costs, reimbursable only if incurred after March 1 following the purchase. Redemption payments by cashier's check, money order or bank draft only. Surplus is claimable through the Boone County Treasurer.
Format	In person certificate sale with auctioneer in the County Commission Chambers on the fourth Monday in August: Boone County sells in person in the County Commission Chambers in the Roger B. Wilson Boone County Government Center, adjacent to the Boone County Courthouse, commencing at 10:00 AM on the fourth Monday in August. Buyers must be present to bid; the Collector conducts the sale with an auctioneer.
Selling office	Boone County Collector

Sources: Boone County Collector, delinquent tax certificate sale (boonemo.gov). Boone County Collector, post-third offering process. Missouri Revised Statutes s. 140.405 (revisor.mo.gov). 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 Boone 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 Boone County, searchable by address, owner, or county, including parcels that never reach a sale list.

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How Missouri tax sales work

One August Monday runs most of the state. Under s. 140.150 the collector's sale falls on the fourth Monday in August. The delinquent list is published three consecutive weeks, and the sale is held in or adjacent to the county courthouse commencing at 10:00 AM, or by electronic media where the collector chooses (s. 140.170). Two jurisdictions in this set, St. Louis City and Jackson County, run court foreclosures instead and carry their own process on their pages.
The winner is whoever pays the required sum, and eligibility is policed. Under s. 140.190 the purchaser is the bidder who pays the taxes, interest and charges due. A buyer delinquent on other property must sign the non-delinquency affidavit, and a nonresident may not bid without filing a written consent to circuit court jurisdiction and appointing a citizen of the county as agent.
The certificate caps at ten percent, and the surplus is not yours. The certificate of purchase states an interest rate not to exceed ten percent per annum (s. 140.290). Anything bid above taxes and costs is surplus, held by the county treasury for the former owner (s. 140.230), and it earns the purchaser no interest at all under s. 140.340.
Redemption runs a year, and stays defeasible until the deed. Under s. 140.340 the owner, a lienholder or an occupant holds an absolute right to redeem for one year and a defeasible right until the purchaser actually acquires the deed. Redemption pays the purchase money, sale costs, title search and notice costs, interest at the certificate rate on the tax amount, and eight percent per annum on subsequent taxes the purchaser paid.
The deed is earned on paperwork, and missed paperwork is fatal. Under s. 140.405 the purchaser must run a title search and notify the record owner and every publicly recorded claim holder, by first class and certified mail, at least ninety days before taking the deed, then file the affidavit; failure to comply loses the purchaser's interest entirely. The collector's deed then vests fee simple (s. 140.420).
Unsold parcels climb a ladder, then leave the calendar. No covering bid means a second offering next year (s. 140.240) and a third offering the year after, the third carrying a ninety day redemption (s. 140.250). After the third offering the collector offers unsold parcels once every thirty days, and post-third purchasers take a deed immediately with no redemption; counties and cities may also hold parcels through a trustee under s. 140.260.

How bidding works in Boone County

Registration is the affidavit: sign the non-delinquency affidavit at the Collector's office or at the sale site immediately before the sale, and be present to bid. Nonresidents of Missouri must make special arrangements with the Collector before the sale or not bid at all.

Bid the tax amount, not the parcel, at first and second offerings. Interest runs at no more than ten percent and only on the taxes and costs; every dollar of overbid becomes surplus that earns nothing and waits on redemption to come back. On a contested parcel the disciplined Missouri bid stops where the certificate stops paying.
The ladder rewards patience. The same parcel returns as a second offering, then a third offering with a ninety day redemption, then in the post-third cycle with no redemption at all. A buyer who wants the property rather than the yield often does best at the bottom of the ladder, and the counties in this set run those later channels very differently, from Boone County's sealed bid post-third sales to Jefferson County's trustee.

Terms: what a bid actually costs

Deposit, Boone County	No separate bidding deposit. Boone County's discipline is immediate full payment at the close of the sale, backed by the 25 percent penalty on an unpaid bid.
Payment, Boone County	Immediately at the close of the sale, to the Collector's office: cashier's check, money order, bank draft, or cash. No personal checks and no credit or debit cards. Miss it and the bid draws a penalty of 25 percent of the bid plus a prosecuting attorney's fee.
What is sold	At a first or second offering, a certificate of purchase: a lien position, not the property and not a deed. The purchaser's road to ownership runs through the redemption period and the s. 140.405 notice process. At a post-third offering, what is sold is effectively the deed itself, issued immediately with no redemption.
The interest rate	The certificate states an interest rate not to exceed ten percent per annum (s. 140.290). The rate attaches to the delinquent taxes and sale costs. Nothing above that amount earns anything: the surplus belongs to the former owner.
The surplus	Any amount bid above the taxes, interest and costs is surplus, deposited in the county treasury for the former owner under s. 140.230, and noted separately on the certificate. On redemption it goes back through the county process; it is never yield, and pricing a contested parcel as if the overbid earned ten percent is the standard Missouri beginner's error.
Redemption money	The purchase money, the costs of sale, the purchaser's title search and notification costs, and interest at the certificate rate (capped at ten percent) on the tax amount, plus subsequent taxes the purchaser paid at eight percent per annum (s. 140.340). No interest is owed on any excess above delinquent taxes plus sale costs.
Redemption periods	One year absolute, and defeasible until the deed issues, for first and second offerings (s. 140.340). Ninety days for third offerings (ss. 140.250, 140.405). None at all for post-third purchases, where the deed issues immediately.
The deed path	Title search report from a licensed attorney or title company; notice of the right to redeem to the record owner and every publicly recorded claim holder at least ninety days before the deed, by first class and certified mail return receipt requested; affidavit at the end of the redemption period (s. 140.405). Counties apply an eighteen month outer limit from the certificate: miss the process and the purchaser's interest is lost.

Unsold parcels: the post-third sealed bid offering

Boone County runs the cleanest post-third process in the state. Properties offered at the annual sale for three years with no bids may be offered by the Collector at any time and for any amount: advertised in the local newspaper 30 days before bidding opens and posted online; bidders register within 10 business days before bidding opens with a notarized non-delinquency affidavit and receive a bidder number; sealed bids are accepted over a 10 business day window and must be received by 5:00 PM on the last day; bids are opened and acknowledged during a commission meeting; payment is due within 5 business days in certified funds plus a separate 27.00 dollar certified payment to the Recorder of Deeds; on payment the collector's deed is recorded and issued, and there is no redemption period. Historical post-third sales on the Collector's page: October 18 to 31, 2019, November 6, 2018, and April 19, 2018.

Before you bid

Model the surplus at zero percent. Run every first or second offering bid with the overbid earning nothing and returning only on redemption. If the deal only works with yield on the full bid, it does not work in Missouri.
Calendar the deed process the day you buy the certificate. The s. 140.405 title search and ninety day notice, inside the eighteen month outer limit counties apply, are where Missouri certificates go to die. The buyer who diaries the process owns the deed path; the buyer who does not loses the interest entirely.
Read the county's channel before the state's frame. Eight counties in this set run ch. 140 sales, but no two run them identically: sealed bids in St. Louis County, GovEase in Clay County, courthouse steps elsewhere, and two jurisdictions, St. Louis City and Jackson County, run court foreclosures with no certificate at all.
Set the maximum before the sale opens. The free Max-Bid Calculator below works backwards from your exit value to the highest bid you can pay, with the costs shown.

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New York tax sales · Florida tax deed sales · Texas tax sales · Pennsylvania tax sales · Georgia tax sales · North Carolina tax foreclosure sales · Ohio tax foreclosure sales · Illinois tax lien sales · Michigan tax foreclosure sales · Arizona tax lien sales · California tax defaulted property sales · Colorado tax lien sales · South Carolina tax sales · Indiana tax lien sales · Tennessee delinquent tax sales · Wisconsin tax deed sales