Delaware runs 3 different redemption windows
Which one applies is decided by the parcel, not by the state, so read the condition before trusting the headline figure.
How the clock works
The clock starts at court approval, not at the auction. After the sheriff returns the writ, the Superior Court inquires into the regularity of the proceedings and approves the sale or sets it aside. County offices schedule that confirmation about a month after the sale (New Castle and Sussex: the first Friday after the third Monday of the month following the sale), so the owner's window in practice closes about three months after the auction. Sussex County tells buyers that access to a monition property is not granted until the 60 days after confirmation have run. If the purchaser refuses payment or cannot be found in the county, the owner may pay the amount into the Court. After redeeming, the owner may petition to have the redemption noted on the judgment record and then holds the parcel subject to the same liens as before the sale, except as the sale proceeds reduced them.
Who can redeem
The owner of the real estate or the owner's legal representatives. Subchapter II gives no separate redemption right to lienholders; the New Castle County attachment route in Subchapter III does.
What the owner pays to redeem
The purchase price plus 15 percent of it, together with all costs incurred in the cause, paid to the purchaser or the purchaser's legal representatives, successors or assigns, or into the Court for the purchaser's use.
How your interest accrues
The 15 percent is a lump sum on the purchase price, not a rate that accrues by the day or by the year. The redemption window is 60 days from the court's approval of the sale, so the whole premium is earned over a hold of roughly three months from the auction.
How the bidding works
There is no rate to bid down, because no certificate is sold. Bidders compete on price at the sheriff's public auction. The buyer's return, if the owner redeems, is a flat 15 percent added to the full purchase price, overbid included, plus costs. It does not prorate: redemption on day 2 or day 60 after court approval costs the owner the same 15 percent. Several statutory steps look like sales but are not investor sales and must never be published as a sale date: the praecipe and judgment entry on the Superior Court's special judgment docket, the sheriff's posting of the monition on the property, the Superior Court's later confirmation (approval) of a sale already held, and a New Castle County agent bidding in for the County under 9 Del. C. 8753. The only event a bidder can attend is the sheriff sale itself. A county sheriff sale list also mixes mortgage foreclosure (Lev Fac) and judgment (Vend Exp Judge) sales with the tax sales, which New Castle County's rules label Vend Exp Monition, so a sheriff sale date is a tax-sale date only when the list carries monition items.
What happens when it ends
The tax collecting authority files a praecipe in the Prothonotary's office naming the assessed owner, the tax bills and the property. The Prothonotary enters the amount as a judgment on a special judgment docket, then on a further praecipe issues a monition to the sheriff. The sheriff posts the monition on a prominent part of the property and returns it within 10 days; the posting is notice to the owner and everyone with an interest. If the judgment and costs are not paid within 20 days after the sheriff's return, the Prothonotary issues a writ of venditioni exponas commanding the sheriff to expose the property to public sale. For parcels with an unknown owner for more than 5 continuous years the county may proceed without the owner-notice steps it cannot perform.
A redeemed certificate, plus your accrued interest, is what makes the wait profitable; see how redemption periods work across states. An unredeemed certificate is instead your path to the property through a tax deed sale, which still does not convey marketable title on its own, so budget for a quiet title action.
Verified Sep 25, 2026 against Delaware statutes.
Tax Sale Atlas publishes educational information about public tax sale processes. This is not legal, financial, or investment advice. Rules, dates, and fees change; confirm with the county office before you bid.