Spotlight on Umbrella companies from HMRC – The series of Spotlight publications on GOV.UK sets out HMRC’s view of arrangements that we believe are being used to avoid paying tax. We have recently published a new Spotlight on umbrella companies that warns people about umbrella companies that offer to reduce tax bills and increase take home pay. It highlights the risks of using these arrangements and the type of things to look out for. If you are aware of these types of arrangements operating you should report these to HMRC.
https://www.gov.uk/guidance/umbrella-companies-offering-to-increase-your-take-home-pay-spotlight-45