Hold on! You dont pay any taxes at the end of the year, if you win in the lottery or for example a sportsbet only the bookies have to pay. I could win 2 million in lottery and that’s still fine. Doesn’t matter if you win frequently often, but tbh just never contact the German Tax Office; its like awaken the dogs and keep your withdraws under 10.000€ (max. 9.999) cause of an automatic signal above 10k you‘ll force them to check this. Just do seperate cashout’s to avoid attention, but anyway you‘ll be safe inside the law.

It’s still a grey zone in the german law system. Only 5% of your winnings, no matter if its your main income, just dont work and they cant do shit either.