Md. Code Ann., Tax-Prop. § 13-402.1 — § 13-402.1

(a) The governing body of a county that has adopted home rule powers under Article XI-F of the Maryland Constitution may impose a transfer tax on an instrument of writing:
(1) recorded with the clerk of the circuit court for the county; or
(2) filed with the Department.
(b) A transfer tax imposed under this section:
(1) may not exceed 0.5%; and
(2) does not apply to an instrument of writing exempt from the State transfer tax under § 13-207 of this title.