Eugenie and Beatrice, who are ninth and tenth in line to the throne, both hold full-time jobs.
Neither receives cheques from the Sovereign Grant, the Government-supported fund that finances the Queen’s official duties and residences.
Princess Eugenie works as a director for Mayfair-based art gallery Hauser & Wirth, and all her money is privately earned.
The two currently attend a handful of royal events during the year, including occasionally joining the Queen at garden parties and accompanying the family at Trooping the Colour.