How did Soviet aid support Cuba’s economy after the revolution?

Following the Cuban Revolution, the Soviet Union became a critical economic partner for Cuba, providing essential support that sustained the island's centrally planned economy for decades.12

Soviet aid was multifaceted, consisting of loans, petroleum, war matériel, and technical advice, which together accounted for a significant portion of Cuba’s annual budget. A cornerstone of this relationship was trade: the Soviet Union purchased the majority of Cuba’s sugar crop, frequently at prices well above those of the free world market. By the late 1980s, nearly three-quarters of Cuba’s trade was conducted with the Soviet Union under these highly favorable terms.13

In 1972, Cuba solidified this integration by becoming a full member of Comecon, the Soviet-led economic organization. This dependency effectively subsidized the Cuban economy, helping to mitigate shortages and maintain low unemployment through the overstaffing of state enterprises. However, this reliance left Cuba’s economy extremely vulnerable; the dissolution of the Soviet Union in 1991 led to the loss of this vital income, triggering a severe economic crisis characterized by widespread shortages of goods, power, and transportation.3452