Earlier this week, Buckingham Palace shared some of the costs involved in running the official lives of royal couple Prince William and Kate Middleton, along with William’s brother, Prince Harry. And it seems that Prince Charles covers most of the royals’ expenses for official engagements such wardrobes and travel costs.

According to People, a report released by Clarence House details the expenditures of Prince Charles from April 1, 2014 to March 31 of this year. Based on the report, the future king’s income for the specified period amounted to $31.1 million -- which is 1.7 percent higher than in the previous period. The 66-year-old royal draws his income from the Duchy of Cornwall, a massive estate given to the heir to the throne to fund his official and private livelihoods. And like any other individual, Prince Charles also pays income tax on his earnings.

Per the Annual Review, Prince Charles’ official budget covers the royal activities of his sons and daughter-in-law. A small portion of the fund, totaling $4.6 million, is allotted for the staff, travel and official wardrobes of William, Kate and Harry. However, the palace did not provide a breakdown of the costs, making it impossible to identify how much was allotted for Kate’s amazing wardrobe.

The allotted $4.6 million also does not account for the cost of refurbishing William and Kate’s country home, Anmer Hall. The Duke and Duchess of Cambridge reportedly pay for the renovations and upkeep of their Norfolk home, including their housekeeper and nanny for Prince George and Princess Charlotte. 

The palace also released a breakdown of Prince Charles and wife Duchess Camilla’s eco-footprint or carbon report over the past year, including the results of their efforts to reduce greenhouse gas emissions, states E! News. According to the report, Charles "has been a leader in helping to foster good sustainability practice for 40 years," and because of this, Clarence House "is committed to monitoring, reporting on, and continually improving its sustainability performance."

Meanwhile, Prince Charles recently spent an enjoyable day planting trees with grandson Prince George. Sources told Us Weekly that George helped his grandfather plant a balsam poplar tree and a winter orange lime tree, on the grounds of Charles’ country estate Highgrove House.  A royal insider revealed that the pair “loves to garden together” and that Prince Charles has plans to renovate the Highgrove treehouse, where Prince William and Harry used to play, so George can enjoy it too.