Joint Comprehensive Plan of Action (JCPOA)

The Joint Comprehensive Plan of Action, or JCPOA, is the 2015 agreement under which Iran accepted strict limits on its nuclear programme in return for the lifting of international sanctions. It is commonly called the Iran nuclear deal. The goal was to make sure Iran could not quickly build a nuclear bomb, while letting it keep a peaceful nuclear programme for power and research.

Why was it needed?

Uranium is used as fuel for nuclear power plants. But if it is enriched to a very high level (around 90%), it can be used to make a nuclear bomb. By the early 2010s, Iran had thousands of centrifuges (machines that enrich uranium) and a growing stock of enriched uranium. Many countries feared Iran was moving towards a weapon. Iran said its programme was only peaceful. The deal was a middle path: Iran would accept limits and inspections, and the world would ease sanctions.

Who signed it and when?

• The deal was between Iran and the P5+1: the five permanent members of the UN Security Council (the US, the UK, France, Russia and China) plus Germany. The European Union also took part.
• An interim deal, the Joint Plan of Action, was reached in November 2013.
• The final JCPOA was concluded in Vienna on 14 July 2015.
• The UN Security Council endorsed it through Resolution 2231 on 20 July 2015.
• Implementation Day was 16 January 2016, when the International Atomic Energy Agency (IAEA) confirmed Iran had cut back its programme, and sanctions were lifted.

What did Iran agree to?

• Enrich uranium only up to 3.67%, the level used for power plant fuel, for 15 years.
• Keep a stockpile of less than 300 kg of enriched uranium (as uranium hexafluoride) for 15 years.
• Cut installed centrifuges from about 19,000 to 6,104, with only 5,060 actually enriching, at Natanz, for 10 years.
• No enrichment at the deep underground Fordow site for 15 years.
• Redesign the Arak heavy-water reactor so it cannot produce weapons-grade plutonium.
• Allow extensive IAEA inspections and monitoring.

In simple words, the deal aimed to stretch Iran's "breakout time" (the time needed to make enough bomb-grade material for one weapon) to about one year, so the world would have time to respond.

What did Iran get?

Relief from UN, EU and US nuclear-related sanctions. Iran could sell oil more freely, its banks could reconnect to the world, and some of its frozen money was released.

The snapback mechanism

Resolution 2231 included a "snapback": if any party complained that Iran was seriously breaking the deal, old UN sanctions would automatically return after 30 days unless the Security Council voted to keep the relief. This was designed so that no single permanent member could use its veto to block the return of sanctions.

How did the deal fall apart?

• 8 May 2018: The United States withdrew from the JCPOA and brought back its sanctions, including secondary sanctions on anyone buying Iranian oil.
• From 2019: Iran stepped back from its limits in stages. It crossed the enrichment and stockpile limits, and began enriching to 60% in April 2021, close to weapons grade.
• June 2025: After Israeli strikes on Iran, the US struck the Fordow, Natanz and Isfahan nuclear sites on 22 June 2025. On 2 July 2025, Iran suspended cooperation with the IAEA by law.
• 28 August 2025: The UK, France and Germany (the "E3") triggered snapback, saying Iran was in "significant non-performance". UN sanctions returned on 27 September 2025. Iran, Russia and China called this legally flawed.
• 18 October 2025: This was the deal's planned "Termination Day", ten years after Resolution 2231. Iran declared the agreement over.

India's position

India welcomed the JCPOA in 2015. India has always said it supports Iran's right to peaceful use of nuclear energy, but that Iran must meet its international obligations, and that disputes should be settled through dialogue and diplomacy. The deal mattered to India for practical reasons: sanctions relief allowed India to import more Iranian oil and to move forward with Chabahar port. The US exit in 2018 reversed much of this.

Commonly confused concepts

• JCPOA vs NPT: The NPT (Treaty on the Non-Proliferation of Nuclear Weapons, 1968) is a global treaty; Iran is a member. The JCPOA was a separate, time-limited deal about Iran alone. India is not a member of the NPT.
• JCPOA vs Joint Plan of Action (2013): The 2013 Joint Plan of Action was the short interim deal. The JCPOA (2015) was the final, detailed agreement.
• P5+1 vs E3/EU+3: P5+1 = US, UK, France, Russia, China plus Germany. E3 = only the UK, France and Germany. "E3/EU+3" is the European name for the P5+1.
• Low enriched vs highly enriched uranium: Around 3 to 5% is used as power plant fuel. 20% or more counts as highly enriched. Around 90% is weapons grade.
• IAEA safeguards vs Additional Protocol: Safeguards are the basic inspections every NPT member accepts. The Additional Protocol gives inspectors wider access, including short-notice visits.

Issues, criticism and the way forward

• Critics of the deal argued that its limits were temporary ("sunset clauses"), and that it did not cover Iran's missile programme or its role in regional conflicts.
• Supporters of the deal argued that it was working: the IAEA had repeatedly confirmed Iran's compliance before 2018, and it had pushed Iran's breakout time to about a year.
• Trust deficit: The US exit made Iran doubt that any future deal would last. Iran's steps beyond the limits made others doubt Iran's intentions.
• Loss of monitoring: With IAEA access suspended, the world knows less about Iran's nuclear material, which raises the risk of miscalculation.
• Way forward: Most experts see a need for a new agreement that restores IAEA inspections, caps enrichment, gives Iran credible and lasting sanctions relief, and has guarantees that make it survive changes of government.

Concepts to Know

• Uranium enrichment: Increasing the share of the useful form of uranium (U-235) in natural uranium. Natural uranium has only about 0.7% U-235.
• Centrifuge: A machine that spins uranium gas very fast to separate the lighter U-235 from the heavier U-238. Many centrifuges linked together are called a cascade.
• IAEA (International Atomic Energy Agency): The UN-linked body, set up in 1957 and based in Vienna, that promotes peaceful nuclear energy and inspects countries to make sure nuclear material is not used for weapons.
• Heavy-water reactor: A type of nuclear reactor that can produce plutonium, another material that can be used for bombs.
• Breakout time: The time a country would need to produce enough weapons-grade material for one nuclear bomb if it decided to.
• Sunset clause: A part of an agreement that ends automatically after a fixed number of years.