The scheme to be followed in Spanish public-private partnerships (PPPs) as a way to privatise infrastructure in Spain will inevitably depend on the nature of the infrastructure itself. If it is to be used or built to provide public services (those which provision the Government or local Administration have declared reserved to themselves), such infrastructure is qualified as public domain infrastructure and, thus, cannot be sold to private investors, but they can be contracted to build and operate them. However, the public entity which holds this infrastructure can contribute to a company and transfer a stake of its equity to a private investor. If the infrastructure is not to be used to provide public services, it can be sold to private investors or contributed to a company, and such entity sold to those investors. There are inevitably variables between the diff erent types of structures, many of which require careful consideration by constructors and financiers alike.