HMRC sees umbrella companies as potentially dodgy. Wikipedia has a good overview here: https://en.wikipedia.org/wiki/Umbrella_company https://en.wikipedia.org/w

HMRC sees umbrella companies as potentially dodgy. Wikipedia has a good overview here: https://en.wikipedia.org/wiki/Umbrella_company https://en.wikipedia.org/wiki/Umbrella_company You don't just jump ships, you build your business on the side, then decrease the number of hours at your full time job. Don't forget pension contributions.