A new and distinct cultivar of Poinsettia plant named ‘;PER1549’;, characterized by its moderately compact, uniform, upright and mounded plant habit; moderately vigorous growth habit; freely and upright to somewhat outwardly branching habit; dark green-colored leaves; under natural season conditions, plants flower on or about November 25 in Southern California; large inflorescences with bright yellow to yellow orange-colored flower bracts; and good post-production longevity.