> At least if you are in Germany you need to have a business incorporated when you want to sell to customers or businesses. No. You can act as a GbR. It’s a go

> At least if you are in Germany you need to have a business incorporated when you want to sell to customers or businesses. No. You can act as a GbR. It’s a good idea to incorporate a limited liability company to shield your personal property from liability, but it’s not a requirement. If you do, a UG mbH will do just fine and is simple to set up, but requires proper bookkeeping. You need to register for tax and at the Gewerbeamt likely (depends, ask a tax accountant about your specific case) but both are trivial. You do need to provide an invoice, but there are tons of options to make that simple - a word template may be sufficient.