I'm expecting both a small bonus and cost of living payment this month. It will add around 50% to my usual monthly salary for July but keep me within the 40% higher tax rate even if HRMC assume this is my new monthly salary when the total is multiplied by 12 (I.e. under £125,140 per annum). Struggling to get through to HMRC. Does anyone know if I need to tell them in advance to avoid any emergency tax being applied? Thanks in advance