Does anyone know how tax on fairer share payment works? They say they report the payment to HMRC - so do I have to do anything to make sure HMRC taxes me? Or does HMRC just work out that my income is my job plus this very random £100 and they'll automatically sort the tax on the rest of my income accordingly (I.e. 20% of £100 spread over the year?)
My tax affairs are otherwise pretty straightforward - one PAYE full-time job at the 20% band.