Md. Code, Correctional Services § 11–504

(a) An incarcerated individual who is sentenced to a local correctional facility shall be allowed an initial deduction from the incarcerated individual’s term of confinement.

(b) The deduction described in subsection (a) of this section shall be calculated:

(1) from the first day of the incarcerated individual’s postsentence commitment to the custody of the local correctional facility to the last day of the incarcerated individual’s maximum term of confinement;

(2) (i) at the rate of 5 days for each calendar month if the incarcerated individual’s term of confinement includes a consecutive or concurrent sentence for a crime of violence, as defined in § 14–101 of the Criminal Law Article or a crime of manufacturing, distributing, dispensing, or possessing a controlled dangerous substance in violation of § 5–612 or § 5–613 of the Criminal Law Article; or

(ii) at the rate of 10 days for each calendar month for all other incarcerated individuals; and

(3) on a prorated basis for any portion of a calendar month.