Understanding the Layers of Sanctions Imposed on Iran

Iran remains one of the most heavily sanctioned nations globally, subject to a complex web of overlapping restrictions imposed by the United States, the European Union, the United Kingdom, and the United Nations. Since 1979, the country has endured successive waves of sanctions, some of which have been reinstated over time. These measures target a wide array of sectors, including oil exports, the banking system, nuclear and missile programs, military activities, and senior government officials.

United Nations Measures

In September 2025, France, Germany, and the UK activated the “snapback” mechanism under UN Security Council Resolution 2231, officially reimposing UN sanctions. This action reinstated six prior resolutions designed to curb Iran’s nuclear and military ambitions. Key provisions include a comprehensive arms embargo prohibiting conventional weapon transfers, bans on supplying materials and technology for nuclear enrichment, and restrictions on ballistic missile activities capable of carrying nuclear warheads. Additionally, the sanctions impose asset freezes and trade controls linked to these programs, alongside targeted sanctions against dozens of specific individuals and entities.

United States Sanctions

The United States recently introduced a new round of sanctions aimed at intensifying economic pressure amid ongoing conflict. Enforced by the Office of Foreign Assets Control (OFAC) within the Department of the Treasury, these measures are multi-faceted. They include a broad trade embargo that prohibits most commercial investment and trade. Secondary sanctions are also in effect, penalizing foreign entities that engage in trade or financing with Iran across various sectors such as digital assets, technology, gold, aviation, and shipping. The goal is to further isolate Iran from the global financial system.

Furthermore, sectoral sanctions focus on key industries like energy and shipping, restricting the export of goods and services to entities doing business with them. Human rights and terrorism-related designations have labeled members of the Islamic Revolutionary Guard Corps (IRGC) and other groups as Specially Designated Global Terrorists. As a result of these policies, billions of dollars in Iranian assets held within US financial institutions remain frozen.

European Union Restrictions

The EU regularly reviews and adjusts its sanctions regime, which currently encompasses nuclear-related restrictions on the supply of goods and technology. A trade embargo targets Iranian oil and petroleum products, while limitations are placed on exporting dual-use goods—items with both military and civilian applications. Financial sanctions prohibit transactions with banks associated with nuclear proliferation or terrorism, and sectoral measures cover shipping, aviation, petrochemicals, and metals such as aluminum and steel. The EU also maintains an arms embargo banning the sale or transfer of weapons and components.

United Kingdom Policy

Britain’s sanctions framework largely aligns with those of the UN and EU. It includes nuclear-related export controls, trade embargoes on oil and gas products, and restrictions on goods and services tied to nuclear and ballistic missile programs. Financial sanctions involve asset freezes on Iranian banks and prohibitions on providing services to entities linked to terrorism or nuclear activities. Additional measures target the shipping and maritime sectors, restrict trading in sensitive dual-use goods, and impose asset freezes and travel bans on individuals and entities involved in human rights abuses, such as violent repression and censorship.

International Participation

Other nations, including Australia, Canada, Japan, New Zealand, Norway, and Switzerland, have implemented their own versions of these sanctions. Their measures primarily mirror those of major powers, focusing specifically on curbing Iran’s nuclear program and addressing human rights violations.