Maryland Code, Tax-General § 7-204

(a) In this section, “clear value” means fair market value minus expenses.

(b) The inheritance tax rate is 10% of the clear value of the property that passes from a decedent.

(c) If a decedent died on or before May 31, 1975, the rate of the inheritance tax is the rate in effect on the date of the decedent's death.