Working as experienced contractor in Belgium you can make between 500 and 650 euro's per day. Less experienced can go from 350 until 500 euro's per day.
As a foreigner working in Belgium and you incorporate in a tax beneficial country you make a decent wage.
If you are going to work as a salaried employee you will take a lot less. So contracting work can be more lucrative.
I'm a Belgian working in Belgium. So my only option is to pay Belgian Taxes. But with my incorporation I can optimize a little bit. But in the end I pay a lot of taxes ;)
But If I would go to work in Germany or any other Shengen country I could optimize better.
If you're just doing contracting on your own, incorporating in mainland Europe is basically insane, as you'll spend a ton of your time chasing after bureaucratic stuff, and paying a lot for the privilege. And in any case, what's the point...
As a foreigner working in Belgium and you incorporate in a tax beneficial country you make a decent wage.
If you are going to work as a salaried employee you will take a lot less. So contracting work can be more lucrative.