In 1964, Réunion, as an overseas department of France, operated under the French Franc (FRF) as its official currency. The island's monetary system was fully integrated with mainland France, meaning the Banque de France issued the currency and set monetary policy. There was no separate Réunionese franc or independent central banking authority; the local economy was directly tied to the financial conditions and stability of the metropolitan franc zone.
This period fell within the era of the Bretton Woods system, where the French franc had a fixed exchange rate. For Réunion, this provided a stable and predictable currency environment, crucial for an economy heavily dependent on imports and subsidies from mainland France. The primary agricultural exports, notably sugar, were traded in francs, insulating local producers from foreign exchange risk but also tethering the island's economic fortunes directly to French fiscal and monetary decisions.
The currency situation reflected Réunion's political status, emphasizing its assimilation into France rather than any monetary autonomy. While this integration guaranteed stability and facilitated trade and aid flows from the metropole, it also meant Réunion had no independent tools to address local economic challenges, such as high unemployment or structural trade deficits. The franc in circulation was identical to that used in Paris, symbolizing and reinforcing the department's profound economic and political connection to its colonial ruler.