As a member of the royal family, Prince William doesn't receive a traditional salary - but he definitely makes money. This year's Duchy of Cornwall Integrated Annual Report broke down the Duke of Cornwall's earnings for the 2024-2025 financial year. William, 43, officially took on the title as Duke of Cornwall after his father, King Charles III, ascended to the throne in 2022. The Duchy of Cornwall is an estate created by King Edward III in 1337, providing funds for the heir to the British throne.