Likely Freiberufler (liberal profession, § 18 EStG)
Your activity points to a liberal profession. Freiberufler need no trade registration, pay no trade tax (Gewerbesteuer), and aren't mandatory IHK members. You report income on Anlage S and calculate profit with the EÜR (cash-basis).
- No trade registration (Gewerbeanmeldung) needed
- No trade tax (Gewerbesteuer)
- No mandatory IHK membership
- Profit via EÜR, reported on Anlage S
Freiberufler are exempt from trade tax.
Your tax office (Finanzamt) makes the final call via the “Fragebogen zur steuerlichen Erfassung”. When in doubt, a binding ruling (verbindliche Auskunft) or a tax advisor helps. This test is guidance, not legal advice.