Quick answerWisconsin sells tax deeds for unpaid property taxes. Redemption: The owner may redeem at any time before the county records a tax deed or an in-rem foreclosure judgment bars the right. A county generally may take a tax deed or foreclose its certificate after 2 years from issuance of the tax certificate (1 year where razing/restoration costs are included, or for certificates held by a city acting under Wis. Stat. 74.87 or a county of 500,000+ population in an in-rem action) - Wis. Stat. 75.14, 75.19, 75.521. No redemption after the county takes title and sells. Sales: No single annual sale date; counties take tax deeds / in-rem judgments on a rolling basis and sell tax-deeded land year-round as inventory is cleared, after advertising under Wis. Stat. 75.69. Governing law: Wisconsin Statutes ch. 74 (esp. 74.47, interest and penalty) and ch. 75, Land Sold for Taxes (esp. 75.14, 75.19, 75.35, 75.521, 75.69).