Between 1722 and 1779, the Bourbon kings managed to achieve financial stability without broadening the tax base or borrowing on a large scale. The incorporation of Aragon's territories under the crown of Castile, the Bourbon administrative reforms, sustained population and economic growth during the first half of the eighteenth century, added to the silver coming from the Americas, explain the general increase in income within the existing fiscal constitution. The revenues extracted from the American possessions, in particular from New Spain, were essential in keeping the metropolitan budget balanced. However, from the 1790s onwards, constant international warfare made ordinary revenues collected in the Americas insufficient for financing deficit spending in Spain. To meet shortfalls, the crown implemented extraordinary measures including the collection of loans, donativos, ecclesiastical subsidies, and the enforcement of the Decreto de Consolidación de vales reales in 1804. These measures demonstrate that the Spanish crown increasingly relied on its imperial financial network to balance its budget, and simultaneously postponed the politically costly implementation of a thorough fiscal reform in the metropolis.