The Churchill Knight Umbrella online umbrella calculator is for illustration purposes only. It is designed to give contractors and freelancers an indication of their earning potential working through Churchill Knight Umbrella – an FCSA accredited and SafeRec certified umbrella company. The figures are based on working 52 weeks with holiday pay paid each time payroll is processed. The margin used in this calculator is £15 per week. To request a tailored calculation based on your personal circumstances, please contact our Sales Department on 01707 871622, or request a calculation here. Churchill Knight Umbrella disclaims liability and responsibility to any person who relies on or partially relies on anything done or omitted to be done by our umbrella company calculator. There are many factors that affect take-home pay through an umbrella company. Please contact us for more information.