Economic Sanctions Against Iran: This is not the first and Probably Not The Last

The history of international and economic sanctions against Iran spans more than four decades, evolving from targeted U.S. responses in the late 1970s into a complex, multilateral web of financial, energy, trade, and human rights-related restrictions.

Phase 1: The Origin and Early Restrictions (1979–1995)

• November 1979:Following the seizure of the U.S. Embassy in Tehran and the taking of American hostages, President Jimmy Carter issued Executive Order 12170. This froze approximately $8 billion to $12 billion in Iranian assets and instituted a trade embargo.These initial measures were lifted in January 1981 via the Algiers Accords.
• 1984:The U.S. designated Iran a State Sponsor of Terrorism, prohibiting arms sales and halting economic assistance.
• 1987:The U.S. reimposed strict trade sanctions in response to Iranian military actions against commercial shipping in the Persian Gulf during the Iran-Iraq War.

Phase 2: Comprehensive U.S. Trade & Energy Embargoes (1995–2005)

• March & May 1995:President Bill Clinton issued executive orders banning U.S. trade with, and investment in, Iran, alongside specific prohibitions on U.S. participation in Iran’s petroleum and energy sectors.
• August 1996:Congress passed the Iran and Libya Sanctions Act (ILSA)—later renamed the Iran Sanctions Act (ISA)—which mandated penalties on foreign companies investing more than $20 million annually in Iran’s energy infrastructure.

Phase 3: The Nuclear Impasse and UN Multilateral Sanctions (2006–2015)

• December 2006:Following Iran’s refusal to suspend uranium enrichment, the UN Security Council (UNSC) passed Resolution 1737, imposing the first round of international UN sanctions, banning the trade of nuclear materials/technology, and freezing assets of key programs.
• 2007–2010:The UN passed a series of subsequent resolutions (Resolutions 1747, 1803, and 1929) progressively tightening arms embargos, monitoring Iranian cargo fleets, blacklisting major Iranian banks, and penalizing the Islamic Revolutionary Guard Corps (IRGC).

2010–2012: The U.S. and European Union escalated unilateral and bilateral measures:

• July 2010:The U.S. enacted the Comprehensive Iran Sanctions, Accountability, and Divestment Act (CISADA), punishing foreign firms dealing in refined petroleum.
• December 2011:The U.S. passed legislation targeting the Central Bank of Iran to cut off oil export revenues.
• Mid-2012:The EU enacted a comprehensive embargo on Iranian crude oil imports, and global financial clearing networks (such as SWIFT) subsequently cut ties with blacklisted Iranian financial institutions.

Phase 4: The JCPOA Deal and Temporary Relief (2015–2018)

• July 2015:Iran and the P5+1 (the five permanent UN Security Council members plus Germany) reached the Joint Comprehensive Plan of Action (JCPOA), or the Iran Nuclear Deal.
• January 2016 ("Implementation Day"):Following verification by the International Atomic Energy Agency (IAEA) that Iran had curbed its nuclear infrastructure, the UN, EU, and U.S. lifted major nuclear-related economic and financial sanctions, allowing Iran to re-enter global oil markets and banking systems.
  Phase 5: "Maximum Pressure" and Post-JCPOA Expansion (2018–Present)
• May 2018:President Donald Trump announced the U.S. withdrawal from the JCPOA.
• Late 2018:The U.S. fully reimposed and aggressively expanded all lifted nuclear-related sanctions under a "Maximum Pressure" campaign, targeting shipping, energy, and hundreds of banking entities.
• 2019–2024:Sanctions grew to frequently incorporate non-nuclear pretexts, including regional proxy conflicts, ballistic missile development, cyber operations, and domestic crackdowns on civilian protests.This included designating the IRGC as a Foreign Terrorist Organization (FTO).
• 2025–2026:Western jurisdictions intensified enforcement targeting international shadow banking networks, illicit maritime "shadow fleets" moving Iranian crude to foreign refineries, digital asset exchanges utilized for sanctions evasion, and measures regarding security enforcement in critical maritime checkpoints like the Strait of Hormuz.Concurrently, the European Union periodically updated parallel asset freezes and travel bans on Iranian officials and entities tied to internal repressions and regional escalations.