Prince William has officially joined the billionaire’s club and passed his father, King Charles, along the way. William now has a net worth of $1.6 billion, according to The Mirror—a sum that is so high in part due to him inheriting the centuries-old Duchy of Cornwall estate when Charles became king in 2022. Those records revealed that William, 44, brought in $28.5 million between 2025 and 2026.