Prince William, as the grandson of the Queen of England, apparently has a net worth of $40 million. That value is bound to reach even higher as the Duke of Cambridge stands to inherit more from the royal family.

According to reports, when the right time comes, Prince William will own the Duchy of Cornwall. Currently, this is Prince Charles' private portfolio of lands and properties, which is valued at about $27 million in 2019.

The Duchy of Cornwall is where Prince Charles gets the fund to pay for his lifestyle. It's also where he gets the money to support the lives of his children, Prince William and Harry, and their families. 

Reports cited that 95% of the expenses of Prince Charles, Prince William and Prince Harry come from this funding. Once Charles becomes King of England, this will be turned over to Prince William, as his heir. 

But Prince William also has enough money from his inheritance from his mother, grandmother and great-grandmother. Prince William actually received $10 million from Princess Diana's estate when he was 25 years old. 

When Prince Charles becomes the King of England, Prince William will inherit his title: The Prince of Wales. As the Prince of Wales, Prince William will have access to the Duchy of Lancaster's coffers, which means he'll receive more funds. 

The oldest son of Prince Charles is also benefitting from his great-grandmother's properties and acquisitions, some of which have historical values as well, such as paintings and jewelry. Prince William is still bound to receive more money given that his grandmother, the Queen, has a personal worth of $500 million and may decide to give some of this fortune to her grandchildren.  

The Duke of Cambridge got considerably less in inheritance money, compared to Prince Harry, from the Queen Mother's inheritance when she died in 2002. However, this has no effect on Prince William's net worth as he's still destined to be richer when he holds the throne in due time.

On top of his inheritance, Prince William also receives money from the Sovereign Grant as a working royal. This grant from the government covers the royal family's travel expenses while on official duties. Thus, they hardly pay anything else when they do their royal business, such as visiting charities and going around the world to learn about the causes and advocacies of the Commonwealth.