A new and distinct cultivar of Poinsettia plant named `PER1124`, characterized by its compact, upright and mounded plant habit; recurved dark green-colored leaves; inflorescences with recurved pink-colored flower bracts with darker pink-colored speckles; early to mid-season flowering; natural season flower maturity date is late November for plants grown in Encinitas, Calif.; and excellent post-production longevity.