Quick answerWyoming sells tax lien certificates for unpaid property taxes. Lien buyers can earn 15% per year plus a one-time 3% penalty on the day of purchase (W.S. 39-13-108; county treasurer guidance). Redemption: 4 years from the date of the tax lien sale; the purchaser may apply for a tax deed after 4 years and no later than 6 years from the sale (W.S. 39-13-108, 39-13-109) Sales: Annual county sales, typically July-September; exact date set by each county (e.g. Laramie County the Thursday after Cheyenne Frontier Days in late July, Platte County in July) Governing law: Wyoming Statutes Title 39, Chapter 13 (W.S. 39-13-108, 39-13-109).