The finances of the British royal family come from a number of sources. The British government supports the monarch and some of his family financially by means of the Sovereign Grant, which is intended to meet the costs of the sovereign's official expenditures. This includes the costs of the upkeep of the various royal residences, staffing, travel and state visits, public engagements, and official entertainment. Other sources of income include revenues from the Duchies of Lancaster and Cornwall, income from assets of other trusts, income from private investments, and a parliamentary annuity. The Keeper of the Privy Purse is Head of the Privy Purse and Treasurer's Office and has overall responsibility for the management of the sovereign's financial affairs. Sovereign Grant The Sovereign Grant is paid annually to the monarch by the Treasury to fund the monarch's official duties, replacing the system of funding the Royal Household by a mixture of civil list payments and grants-in-aid. The level of funding for the Royal Household is now linked to the Government's revenue from the Crown Estate. The Sovereign Grant Annual Report states that the Sovereign Grant was £31 million for 2012–13, £36.1 million for 2013–14 and £37.9 million for 2014–15. The amount of the Sovereign Grant is equal to 15% of the income account net surplus of the Crown Estate for the financial year that began two years previously. Step 4 of subsection 6(1), and subsection 6(4), of the Act provide a mechanism to prevent the amount of the Sovereign Grant increasing beyond what is necessary because of the growth in Crown Estate revenue. Under the Sovereign Grant the National Audit Office is able to audit the Royal Household. On 18 November 2016, a plan was announced to increase the Sovereign Grant from 15% to 25% to renovate and repair Buckingham Palace. The percentage is set to revert to 15% when the project is finished in 2027. As a result, the Sovereign Grant amounted to £76.1m for 2017–18, which for the first time included the "dedicated amount £30.4m" to renovate Buckingham Palace. As of March 2019, the Sovereign Grant Reserve amounts to £44.4 million, with £36.8 million of it set aside "to meet future commitments for the Reservicing of Buckingham Palace". Civil list Until 1760, the monarch met all official expenses from hereditary revenues, which included the profits of the Crown Estate (the royal property portfolio). King George III agreed to