I know a PHP programmer who makes about 6.5k EUR / month as a contractor but that's my only data point. I'm considering moving to Berlin and working there as a

I know a PHP programmer who makes about 6.5k EUR / month as a contractor but that's my only data point. I'm considering moving to Berlin and working there as a contractor so I'd love to see some more data. Keep in mind that the overhead of an employee is huge (I bet it's over 100%) so a contract may be much better financially.