According to the invention, there is provided a novel soybean variety designated XB27D08. This invention thus relates to the seeds of soybean variety XB27D08, to the plants of soybean XB27D08 to plant parts of soybean variety XB27D08 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB27D08 with another soybean plant, using XB27D08 as either the male or the female parent.