I'm receiving quite often request from Marketing or Survey Companies to participated in 1-2 hours consultancy calls base on my area of work expertise.
The hourly rate/pay is quite good and the Company will pay the fee with a Bank transfer.
Now the topic/question is: being already employed with another Company, and declaring my income based on that, how will I justify these additional income to tax authorities? There will be a Bank Transfer, but no invoices from my side as I'm not Self Employed and don't have possibility to issue invoices.
Does anybody have any experience of similar cases?
Get in touch with your Chamber of Commerce or AHV office and tell them you want to register as an individual company with an "Activité Accessoire" (don't know how you say this in German).
They will send you a questionnaire and (if approved) register you to pay AHV. You need to keep your accounts for next year's tax and the AHV office fees.
The AHV office will bill you quarterly for the AHV fees (based upon your estimated annual net consulting revenues).