https://taxliencertificateschool.com - Maryland has an interest rate of 6% to 24% and varies on each county. The redemption period could be 6 months up to 2 years as each of the counties have varied rules. Competitive bidding is also used in tax lien certificate auctions. Maryland Tax Liens | Tax Lien Certificate School Maryland has an interest rate of 6% to 24% and varies on each county. The redemption period could be 6 months up to 2 years as each of the counties have varied rules. Competitive bidding is also used in tax lien certificate auctions. Maryland Tax Liens | Tax Lien Certificate School Maryland has an interest rate of 6% to 24% and varies on each county. The redemption period could be 6 months up to 2 years as each of the counties have varied rules. Competitive bidding is also used in tax lien certificate auctions. Maryland Tax Liens | Tax Lien Certificate School Maryland has an interest rate of 6% to 24% and varies on each county. The redemption period could be 6 months up to 2 years as each of the counties have varied rules. Competitive bidding is also used in tax lien certificate auctions. Maryland Tax Liens | Tax Lien Certificate School