Land · Illinois tax sale guide

DuPage County tax sales, Illinois

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DuPage runs a lien sale, not a deed sale, and runs it in person: buyers check in at the county Administration Building in Wheaton and submit their bids as a file on a USB drive, which the RAMS system works through parcel by parcel. The county itself, as trustee for the taxing districts, bids 9 percent on parcels no one else wants, so an unwanted parcel does not stay unsold; it goes to the trustee at the maximum rate.

Selling office: DuPage County Treasurer Gwen Henry, as ex officio County Collector

Next sale: Tax year 2025 annual tax sale, Thursday, November 19, 2026; check-in 8:00 AM, sale 9:00 AM, DuPage County Administration Building Auditorium, Wheaton. Date, venue and hours are from the Treasurer tax sale information page, read November 9, 2026. Registration ran October 1 to October 30, 2026, so the 2026 buyer list is closed; the sale continues until all parcels are sold.

The November 19, 2026 sale covers tax year 2025. Registration for it closed October 30, 2026, so a first time DuPage buyer is preparing for the fall 2027 window.

Dates and deadlines

Sources: DuPage County Treasurer, Tax Sale 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 DuPage 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 DuPage County, searchable by address, owner, or county, including parcels that never reach a sale list.

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How Illinois tax lien sales work

• Judgment comes first. When taxes stay unpaid, the county treasurer, acting as ex officio county collector, applies to the circuit court for judgment and order of sale against the delinquent parcels (Section 21-190). The delinquent list is advertised, and only parcels under judgment go to the sale. There is no deed on offer at any point in this process: Illinois sells the taxes, and the property changes hands only years later, through a separate court case, if it changes hands at all.
• Buyers register early, and bid as one entity. Registration with the collector is required at least 10 business days before the first day of sale (Section 21-220), and counties close their own windows earlier. In counties of 275,000 or more people, the single bidder rule (Section 21-205(b-5)) requires related buyers to bid as one. Since 2013 the sale itself must be run on an automated bidding system or recorded, which is why so many Illinois sales work through RAMS and a USB drive of bids.
• The annual sale sells a lien certificate, priced by a penalty bid-down. Bidding is by penalty percentage and goes down: the lowest penalty wins. Public Act 104-553, effective July 10, 2026, cut the cap in Section 21-215 from 18 percent to 9 percent, so any county page or packet still quoting 18 percent is pre-amendment text. The winner pays the full amount due, plus per parcel sale fees (commonly $104: indemnity, advertising, clerk, treasurer automation and sale in error fund charges), on the day of sale, and receives a certificate of purchase.
• Redemption runs through the county clerk, and the penalty is the return. Under Section 21-350 as amended, the standard redemption period is now 3 years from the sale; it is 1 year if on the sale date the property is vacant non-farm, has a structure with seven or more residential units, or is commercial or industrial. Certificates issued from January 1, 2024 to July 9, 2026 run the prior 2.5 year track, which the holder can extend under Section 21-385 to no later than 3 years. The owner redeems at the clerk's office by paying the certificate amount plus the penalty at the bid rate for each six month period elapsed (the Section 21-355 schedule: the penalty once in the first six months, then two, three, four, five and six times it as the periods run). A redeemed certificate pays the buyer back with that penalty; that is the normal exit.
• The deed is a second, separate case. Only after redemption expires unredeemed can the certificate holder petition the circuit court for a tax deed, serving the statutory notices the Code requires. Until that deed issues, the buyer holds a lien position: no possession, no rents, and a defined set of sale in error risks that can unwind a purchase. Price an Illinois certificate as a timed claim with a court case at the end of it, not as a property purchase.

How bidding works in DuPage County

Registration for the 2026 sale ran October 1 to October 30, 2026 and required the county registration form, the representations and warranties form, and a W-9 on file with the Treasurer. New buyers should file early in the next window: the statutory floor is 10 business days before the sale (Section 21-220).

• The penalty is the price. The lowest penalty percentage wins, and the penalty is earned per six month period, so a 9 percent bid redeemed in month seven pays twice what the same bid pays in month five. At a 0 percent bid the buyer earns nothing on redemption and is working only for the deed path. Model the redemption track (3 years standard, 1 year for the exception classes) before the number.
• The certificate is not the property. No possession, no rents, no right to enter. The return is the penalty when the owner redeems through the county clerk, or a deed at the end of a court petition if nobody does. Buyers who need the property itself should be reading the Michigan pages, not this one.

Terms: what a bid actually costs

Parcels nobody bids on

An unwanted parcel does not stay on the table: the county, acting as trustee for the taxing districts, bids 9 percent and holds the certificate. Certificates the trustee holds are handled under the county's trustee program rather than a public leftover sale, so the practical leftover channel in DuPage is the trustee's own disposition process; confirm current terms with the Treasurer.

Before you bid

• Know the redemption track before the penalty. Three years standard against 1 year for vacant non-farm, seven or more unit, commercial and industrial parcels is the difference between two holding strategies, and the track is set by the property on the sale date, not by the buyer's preference.
• Read the current statute, not the county FAQ. County pages still showing an 18 percent penalty predate P.A. 104-553. For sales after July 10, 2026 the cap is 9 percent and the standard redemption period is 3 years; where a county page and the Code disagree, the Code governs.
• Registration closes earlier than you think. The statutory floor is 10 business days, and counties close sooner: Will County's deadline fell before its judgment hearing, and DuPage closed registration on October 30 for a November 19 sale. A buyer who starts with the sale list has usually started too late.
• Price the deed path honestly. Notices, a court petition, and sale in error risk sit between a certificate and a deed, and redemption is the common exit. Set the maximum before the sale opens; the free Max-Bid Calculator below works backwards from your exit value.

Every Illinois county in this set

One page per county, each verified against its own treasurer, clerk or statute source. Illinois has 102 counties; this set is the top 20 by population and sale volume.

• Cook County tax sales
• DuPage County (this page)
• Lake County tax sales
• Will County tax sales
• Kane County tax sales
• McHenry County tax sales
• Winnebago County tax sales
• Madison County tax sales
• St. Clair County tax sales
• Sangamon County tax sales
• Champaign County tax sales
• Peoria County tax sales
• McLean County tax sales
• Rock Island County tax sales
• Kendall County tax sales
• Tazewell County tax sales
• LaSalle County tax sales
• Kankakee County tax sales
• Macon County tax sales
• DeKalb County tax sales

Keep going

Once a deadline puts you in a sale, the Land Investor Due Diligence Toolkit is the checklist and bid worksheet to run on each parcel before you bid. The same desk runs 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 and Michigan tax foreclosure sales, and the proven New York season, with the live membership, sits in the NY tax sale hub.