Md. Code, Labor and Employment § 3–424

Each employer shall keep, for at least 3 years, in or about the place of employment, a record of:

(1) the name, address, and occupation of each employee;

(2) the rate of pay of each employee;

(3) the amount that is paid each pay period to each employee;

(4) the hours that each employee works each day and workweek; and

(5) other information that the Commissioner requires, by regulation, as reasonable to enforce this subtitle.