The costs of the wedding itself were borne by the Royal Family and the Middletons themselves, while the costs of security and transport were covered by Her Majesty's Treasury.
The couple also asked that donations be made to charities in place of traditional wedding gifts; to that end, they established The Prince William and Miss Catherine Middleton Charitable Gift Fund, which focuses on assisting charities such as the New Zealand Christchurch Earthquake Appeal, the Canadian Coast Guard Auxiliary, the Royal Flying Doctor Service, and the Zoological Society of London.

The overall price of the event was reportedly £23.7 million.
The Australian newspaper Herald Sun estimated A$32 million for security and A$800,000 for flowers.
Estimates of the cost to the economy of extra public holidays, such as that allowed for the wedding, vary between £1.2 billion and £6 billion.
The British government tourist authority VisitBritain predicted the wedding would trigger a tourism boom that would last several years, eventually pulling in an additional 4 million visitors and generating £2 billion.
However, VisitBritain's head of research and forecasting, David Edwards, suggested to colleagues two days after the engagement was announced that the evidence points to royal weddings having a negative impact on inbound tourism.
He noted that the number of visitors to Britain was down significantly in July 1981, when Prince Charles and Diana were married, from the same period in other years, and also July 1986, when Prince Andrew and Sarah Ferguson were married, was down from July 1985.
The costs of the wedding itself were borne by the Royal Family and the Middletons themselves, while the costs of security and transport were covered by Her Majesty's Treasury. The couple also asked that donations be made to charities in place of traditional wedding gifts; to that end, they established The Prince William and Miss Catherine Middleton Charitable Gift Fund, which focuses on assisting charities such as the New Zealand Christchurch Earthquake Appeal, the Canadian Coast Guard Auxiliary, the Royal Flying Doctor Service, and the Zoological Society of London.
The overall price of the event was reportedly £23.7 million. The Australian newspaper Herald Sun estimated A$32 million for security and A$800,000 for flowers. Estimates of the cost to the economy of extra public holidays, such as that allowed for the wedding, vary between £1.2 billion and £6 billion. The British government tourist authority VisitBritain predicted the wedding would trigger a tourism boom that would last several years, eventually pulling in an additional 4 million visitors and generating £2 billion. However, VisitBritain's head of research and forecasting, David Edwards, suggested to colleagues two days after the engagement was announced that the evidence points to royal weddings having a negative impact on inbound tourism. He noted that the number of visitors to Britain was down significantly in July 1981, when Prince Charles and Diana were married, from the same period in other years, and also July 1986, when Prince Andrew and Sarah Ferguson were married, was down from July 1985.
Wedding of Prince William and Catherine Middleton