The head of the organisation is "very optimistic" after finding the social networking website had abuse its market dominance to gather user's data without their consent.
Speaking at a conference on competition law in Berlin, Federal Cartel Office President Andreas Mundt insisted they are looking into what steps they can take.
He said: "We are currently evaluating Facebook's opinion on our preliminary assessment and I'm very optimistic that we are going to take further steps, even this year, whatever this would mean."
In August, the Federal Cartel Office outlined its criticisms of the website, and objected to the way it acquires data from third party apps such a WhatsApp and Instagram.
Mundt said at the time: "We are conscious that this should, and must, go quickly."
It was previously suggested that the German probe isn't expected to end in fines for Facebook.