[radicalbyte]

Those knowledge workers can also get a flat 30% tax reduction which is applied to their gross wage before other reductions. The end result is that someone earning 100k EUR a year has a net take home pay of 101k EUR.

Source: the tax returns of someone I know who took advantage of this scheme (I could have, only I found out about it too late).

[avar]

Indeed, but this is unrelated to whether or not their employer participates in "research" via WBSO or any other schema, it's more like the U.S. H1B program, i.e. they've got to try to search for talent domestically (or at least make a show of it), not find it, and then pay above a certain amount for the job.

[mrmrcoleman]

The rules are much stricter these days and it’s not indefinite. When I left it was 5 years with a possible 5 year extension.

There’s also a lot of luck in the application process. I had colleagues in identical jobs, similar salaries who didn’t get the 30% ruling when I did.