The tax treaty
In force
The United States and Germany have an income tax treaty in force. It can lower the US tax withheld on dividends, interest and royalties paid to you, if you claim it on a W-8BEN with your German tax number, and it settles which country taxes what when both could. The treaty rate on royalties is 0%.
Stripe
Available locally
Stripe takes businesses registered in Germany, so you don't need a US company to use it. A US LLC gets you a US Stripe account instead, paid out in dollars to a US bank, which helps when most of your customers are American.
Banking
Mercury available
Mercury opens accounts remotely for US companies whose founders live in Germany. It asks for the EIN, the formation documents, your passport, a real business address and a description of the company's existing or planned US operations. Relay asks a non-US owner for a US address, an ITIN or Social Security Number and a US operating presence, so it rarely suits a founder living in Germany.
The time difference
UTC+2
New York is 6 hours behind Germany in summer. Everything we do is in writing, through your dashboard and email, and we reply within one business day, so the time difference rarely slows anything down.