# Iran sanctions
> The interlocking US, UN, and EU sanctions regimes imposed on Iran since 1979 are the primary mechanism constraining Iran's oil revenues, nuclear program, and weapons procurement, shaping Middle East geopolitics and global energy markets.

**Meta:** type: reference · date: 2026-07-03 · heads:  · 4 takes · 2 lenses · 1 regions

## What it is

Iran sanctions are the interlocking economic, financial, and trade restrictions applied to Iran by the United States, the United Nations Security Council, and the European Union. The US framework, administered by OFAC under the Iranian Transactions and Sanctions Regulations (ITSR), is the broadest: it prohibits nearly all US-person transactions with Iran and enables secondary sanctions penalising non-US firms that deal with designated Iranian targets. The UN framework imposes targeted asset freezes, travel bans, and arms embargoes through Security Council resolutions. The EU runs parallel financial and energy-sector restrictions. Together, the regimes aim to constrain Iran's nuclear program, ballistic missile development, and the IRGC's foreign operations.

## History

US sanctions on Iran date to the November 1979 hostage crisis, when President Carter froze roughly US$12 billion in Iranian government assets under Executive Order 12170. The 1996 Iran Sanctions Act introduced secondary sanctions on energy-sector investments. The UN Security Council escalated after Iran's covert Natanz enrichment facility was revealed in 2002: Resolution 1737 (December 2006) imposed the first mandatory nuclear sanctions; Resolutions 1747, 1803, and 1929 (2007-2010) added an arms embargo and IRGC financial restrictions. Resolution 2231 (July 2015) endorsed the JCPOA, suspending nuclear-related UN sanctions in exchange for Iran capping enrichment at 3.67% U-235. US President Trump withdrew from the JCPOA in May 2018 and reimposed sanctions under Executive Order 13846; by early 2019, waivers for major oil customers had lapsed, cutting Iran's crude exports from roughly 2.5 million bpd to under 400,000 bpd. The Biden administration pursued indirect JCPOA revival talks without agreement. Trump reimposed "maximum pressure" via National Security Presidential Memorandum-2 in February 2025. The E3 (France, Germany, UK) triggered the JCPOA snapback mechanism on August 28, 2025; all previous UN sanctions were reimposed on September 28, 2025.

## Current state

As of early 2026, Iran faces the most comprehensive international sanctions architecture since the pre-JCPOA period. OFAC has designated over 1,000 Iran-related persons, vessels, and aircraft since February 2025, targeting the shadow fleet, Chinese teapot refineries buying Iranian crude, and the LPG relabelling networks documented in the [OFACがUAEと中国を拠点とするイランLPG密輸・影の銀行ネットワークを標的に](/ja/n/iran-lpg-shadow-banking-sanctions-2026) action of June 2026. Despite maximum pressure, approximately 90% of Iran's crude exports continue to flow to China, via shadow-fleet tankers and a chain of UAE and Hong Kong front companies. Iranian oil exports ran at roughly 1.5 million bpd in early 2026, well below pre-sanctions capacity of around 3.8 million bpd. The reimposition of UN sanctions in September 2025 restored the arms embargo, asset freezes, and ballistic-missile restrictions that had been suspended under Resolution 2231. Iran notified the IAEA of a new enrichment facility, IFEP, in June 2025, signalling continued nuclear advancement outside the JCPOA ceiling. Iran's oil revenues are further compressed by the price dynamic documented in [India sets record for Russian crude imports in June at 2.35 million bpd as US sanctions waiver lapses unrenewed](/ja/n/india-russia-crude-record-jun29), where sanctioned Russian crude competes with Iranian barrels for the same Asian discount buyers.

## Relationships

The US, EU, and UN frameworks interact but are not identical. A UN delisting does not lift US secondary sanctions, and OFAC designations can reach entities in countries that have no Iran-specific national legislation. China's refusal to enforce US secondary sanctions, and its continued purchases of Iranian oil through intermediary structures, is the central enforcement gap in the current regime. India, which reduced Iranian oil imports after 2019 but has used Russian crude as a substitute, is a secondary target of US pressure. The IRGC's broad designation as a Specially Designated Global Terrorist (SDGT) entity and, since April 2019, a Foreign Terrorist Organization (FTO) gives OFAC the widest possible authority to target IRGC-linked commercial activity. Iran's [sanctions evasion network](/ja/n/iran-oil-evasion-dossier) routes oil through flag-of-convenience vessels, ship-to-ship transfers in Omani and Malaysian waters, and falsified cargo documents.

## What to watch

- Whether the 2026 Doha nuclear talks produce any sanctions relief as part of a broader deal, and how quickly OFAC could unwind secondary-sanctions pressure if a political agreement is reached.
- US enforcement actions against Chinese teapot refineries and banks, which represent the main test of whether secondary sanctions can close the China-Iran trade channel.
- Whether the September 2025 UN snapback's arms embargo significantly restricts Iran's weapons procurement given the parallel Russia-Iran military relationship.
- Whether a Hormuz ceasefire holding creates political pressure to ease OFAC enforcement before a nuclear agreement is finalised.

## Regional takes (batched by bias / lens)

### official record
- **US Office of Foreign Assets Control (OFAC)** (United States, en) — OFAC's authoritative programme page listing all active Iran sanctions authorities, including the Iranian Transactions and Sanctions Regulations (ITSR) and Islamic Republic of Iran Shipping Lines (IRISL) designation; updated continuously.
  Source: https://ofac.treasury.gov/sanctions-programs-and-country-information/iran-sanctions
- **US Department of State** (United States, en) — State Department statement confirming the reimposition of previous UN Security Council sanctions on Iran on September 28, 2025, after the E3 (France, Germany, UK) triggered the JCPOA snapback mechanism on August 28, 2025.
  Source: https://www.state.gov/releases/office-of-the-spokesperson/2025/09/completion-of-un-sanctions-snapback-on-iran

### policy analysis
- **Arms Control Association** (United States, en) — Factsheet cataloguing all seven UN Security Council resolutions on Iran from 2006 to 2015, including the JCPOA-implementing Resolution 2231, and the E3-triggered snapback reimposition of September 2025.
  Source: https://www.armscontrol.org/factsheets/un-security-council-resolutions-iran
- **Congressional Research Service** (United States, en) — CRS analysis of Iran's petroleum exports to China and US sanctions efforts, documenting that nearly all Iranian oil exports have gone to China since 2021 via shadow-fleet evasion techniques.
  Source: https://www.congress.gov/crs-product/IF12952

## Across the graph
- Related: [[iran-lpg-shadow-banking-sanctions-2026]], [[india-russia-crude-record-jun29]], [[iran-oil-evasion-dossier]], [[iran-oil-sanctions-relief]], [[iran-nuclear-iaea-access-standoff]]
- Entities: Iran Sanctions, Iran, Ofac, Iran Oil Evasion, Irgc, Commodity:enrichment

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