Yeah monthly taxes for the first year is a pain although it goes down to quarterly after that. It also makes it harder to get a mortgage and that you will likely not be picked when looking to rent a flat over employed people. There are also uncertainties around how long and how much you can work for a single client without causing issues for your client, although I usually don’t do contracts longer than 6mo. I think it still is far better than working salaried, at least for me.