At 100m you will have a good tax advisor who sets up a network of companies and foundations across Europe and gets your tax rate down to less than half of that rate. If not, get a different tax guy.
Taxes on that would probably be about 44,850,000.
Do you pay taxes after the whole income or just (income -expenses)?
It depends, corporations pay on just profits, so income - expenses. The original poster was talking as if the 100m was pure profit, though. Also, I'm not German, but this is how the tax system works in Greece, the UK and many other countries.