In Arizona, the interest rate is 16% while the redemption period is 3 years. Tax Lien sales are usually held in May or June but still may depend on the specific county. Auctions in this state are by competitive bidding.
Aside from having a 16% interest rate, most counties in Arizona have full parcels of land that are on sale for the whole year. You can get listings of these available parcels after the tax lien auctions in printouts or discs for $50 at the Client Services Department at the Treasurer’s Office.