A box mounting clip for mounting a junction box on a stud mounting bracket includes a base having a front face, a rear face, an upper edge margin, a lower edge margin, a left edge margin, and a right edge margin. A top flange extends forward from the upper edge margin and a bottom flange extends forward from the lower edge margin. The top and bottom flanges are configured to receive a stud mounting bracket therebetween. A positioning tab extends generally forward from the base at an angle and is configured to prevent rotation of the box mounting clip relative to the stud mounting bracket when the stud mounting bracket is received between the top and bottom flanges.