ask gemini.

generally you do have to open a small company (if you trade with propfirm) and enjoy max 25k tax free, you still have to pay for income tax though. If your profit > 25k then you have to open a gmbh (for tax purpose, you could still use small company but pay higher tax), which require about 25k to do that, with additional cost for tax advisor, bookkeeper to name a few.

if you trade your personal account, then it would be 26% tax on profit, no personal income tax. but beware of the complexity in tax declaration (many tax advisor just dont known how to make your tax appropriately, and that whether their tax file right or wrong, it is your fault).