The Queen's finances were at a "historic low" with just £1 million ($2 million) left in reserve, MPs said yesterday.
Her courtiers were advised to take money-saving tips from the Treasury.
A report by the Public Accounts Committee found the Queen's advisers were failing to control her finances while royal palaces were "crumbling".
MPs said her advisers had overspent to such an extent that her reserve fund had fallen from £35 million in 2001 to just £1 million.
The royal household had made efficiency savings of just 5 per cent over the past five years compared with government departments, that are cutting their budgets by up to a third.