Unlike other European jurisdictions such as Malta and Cyprus and Caribbean jurisdictions such as St. Kitts & Nevis, Dominica, Grenada, St. Lucia and Antigua & Barbuda, Portugal does not have a formal Citizenship by Investment Program.
However, investors who purchase real estate under the Portuguese Golden Visa program has a fairly simple route to apply for Portuguese Citizenship.
Once you acquire a real estate project through the Portuguese Golden Visa program and keep hold of it for five years while satisfying the stay requirement of thirty-five days over a five year period, you will be able to apply for Portuguese citizenship through naturalization.
The decision of whether you are appointed as a citizen of Portugal is at the Portuguese government's discretion, however provided the above requirements are satisfied and you are of good character and conduct, an application for Portuguese citizenship should be straight-forward.
Portuguese citizens enjoy the 4th strongest passport in the world, being able to travel visa-free or visa on arrival to 186 countries worldwide and also being able to live, work and study in all European Union member states as Portugal is a member of the European Union.