How much is Derren Brown worth is not as important as what his net worth means if you want to become a successful mentalist like him. Derren Brown is thought to be worth around $7.5 million, which is according to Celebrity Net Worth. His net worth has been built up from his appearances on TV, alongside his successful stage shows around the world. Derren Brown is a British mentalist, but he’s also considers himself to be a psychological illusionist too. He’s also a very creative person showing his skills in painting and writing.