A while ago, at the airport, I overheard a conversation in which a German speaker asked a native speaker “Is that brutto or netto income?”. Understandably, the other person was very confused. As you may already suspect, the words brutto and netto are not part of the English language. The corresponding English words are gross (for the pronunciation see here) and net. Alternatively, you can use the expressions “before tax” and “after tax“.