Luxembourg has very competitive taxes for IP and Patent royalties.
There are many incorporation services in Luxembourg. Many are very expensive and have additional fees. You need a registered office, Accounting Services etc.
We point you to the right company that can not only open a company, but also has very good rates for Accounting Services and registered Office/Agent services.
Incorporating as an SARL requires a minimum share capital of EUR 12,000. The share capital must be fully subscribed and paid up at the time of incorporation.
We also advise you how you can get a bank account.