Zara Philips ($20 Million
Zara Phillips is the 17th in the line of succession to the throne. She is extremely wealthy. She is a businesswoman. Sponsorship deals with clothing company Musto are worth an estimated $1.5 million. She also earned $100,000 as the face for Howrse, a game online for equestrians. Land Rover and Rolex were also involved.

Phillips has also released a line of high-end jewellery and perfumes. She has a number of real estate holdings. Her businesses are quite prosperous, so she earns a lot of money compared to most royals.