CITB Levy form requirement 30th May 2018 It is the time of year when contractors are being issued with their CITB Levy forms, with a completion deadline of 30 June 2018. For those starting in the construction industry the registration process is easily not realised. For the purpose of the construction industry an employer includes those with subcontractors, and therefore the annual return needs to be completed. There is however an exemption from paying the levy for small businesses with a subcontractor bill of less than £80k. You are able to register on the CITB website or contact the CITB levy team on 0344 99 444 55.