Wirecard earlier upgraded its "Vision 2020" targets for revenues and transaction volumes to 3.2 billion euros ($3.6 billion) and 3.2 billion euros respectively, implying that it will earn 1.4% on the transactions it handles.

That compares with a take rate of 1.58% in the first half of this year, Braun told analysts on a conference call. "This is very much on the conservative side. Here we are keeping the powder dry," he said.

(Reporting by Douglas Busvine; Editing by Michelle Martin)