Investor-State Dispute Settlement (ISDS)

Investor-State Dispute Settlement, or ISDS, is a system that lets a foreign company sue the government of the country where it has invested. The case is not heard in that country's ordinary courts. Instead, it goes to a panel of private international judges called an arbitral tribunal. The right to do this comes from an investment treaty (like a BIT) signed between the two countries.

Think of it like a cricket match between two countries where a neutral umpire from a third country is called in, so neither side can complain that the umpire is biased.

Why does ISDS exist?

A foreign company that builds a factory or buys a mine in another country takes a big risk. The host government could suddenly cancel its licence, take over its property or change rules unfairly. If the company can only go to that country's own courts, it may fear delays or bias, because the government is itself the other party.

ISDS gives the investor a neutral forum. This confidence encourages companies to invest. Without it, many investors would either stay away or demand higher returns to cover the risk.

Where did it come from?

Earlier, a foreign investor with a complaint had to ask its own government to take up the matter with the host government. This is called diplomatic protection, and it often turned a business dispute into a quarrel between two countries. After the Second World War, many newly independent countries took over (nationalised) foreign-owned businesses. To handle such disputes in a calmer, legal way:

• The world's first BIT was signed between Germany and Pakistan in 1959.
• The World Bank set up the International Centre for Settlement of Investment Disputes (ICSID) through the ICSID Convention, which opened for signature on 18 March 1965 and came into force on 14 October 1966.
• The UN body on trade law, UNCITRAL (UN Commission on International Trade Law), adopted its Arbitration Rules in 1976. These were revised in 2010, and again in 2013 to add rules on transparency in investor-state cases.

From the 1990s, the number of BITs and ISDS cases rose sharply. As of 31 July 2025, UNCTAD's database recorded about 1,440 known treaty-based ISDS cases worldwide.

How does an ISDS case work?

The steps usually look like this:

1. Dispute arises: the investor says a government action broke a treaty promise, for example, fair and equitable treatment.
2. Notice and cooling-off: the investor formally informs the government and both sides try to settle through talks for a fixed period.
3. Local remedies (if the treaty requires it): some treaties, like India's, make the investor first go through the host country's courts for a set time.
4. Tribunal is formed: usually three arbitrators. Each side picks one, and the third (the presiding arbitrator) is chosen jointly or by an appointing authority.
5. Rules and venue: the case runs under ICSID rules or UNCITRAL rules. Many UNCITRAL cases are administered by the Permanent Court of Arbitration (PCA) at The Hague.
6. Award: the tribunal gives a final decision, called an award. It usually orders money compensation, not a change in the country's law.
7. Enforcement: if the government does not pay, the investor may try to seize government-owned assets abroad through courts in other countries.

The main promises that investors sue over

Most BITs contain the same core protections:

• Fair and Equitable Treatment (FET): the government must act fairly, transparently and without arbitrary behaviour. This is the most commonly claimed breach.
• Protection against expropriation: the government cannot take over the investment without a public purpose, due process and fair compensation.
• National treatment: foreign investors must be treated no worse than local investors.
• Most-Favoured-Nation (MFN): investors from one treaty partner must be treated no worse than investors from any other country.
• Free transfer of funds: profits and capital can be sent back home.

ICSID and India

ICSID is one of the five institutions of the World Bank Group (with IBRD, IDA, IFC and MIGA). It has about 165 member states. India has not signed the ICSID Convention. So cases against India are usually run under UNCITRAL rules, often administered by the PCA. One practical result: ICSID awards are protected from challenge in national courts, but non-ICSID awards can be challenged in the courts of the country where the arbitration is legally seated.

India's experience with ISDS

India was rarely sued until 2011. Then came a series of major cases:

• White Industries v. India (award of 30 November 2011): the first investment treaty award against India, under the India-Australia BIT. An Australian company had won a commercial arbitration against Coal India in 2002, but Indian courts took over nine years without deciding on enforcing it. The tribunal held that this delay denied the investor "effective means" of enforcing its rights. The investor borrowed this promise from the India-Kuwait BIT using the MFN clause.
• CC/Devas v. India (award of 25 July 2016): under the India-Mauritius BIT, over the cancellation of an S-band satellite spectrum deal between Devas and Antrix, the commercial arm of ISRO. India had cited national security needs.
• Vodafone v. India (award of 25 September 2020): a PCA-administered tribunal under the India-Netherlands BIT held that the retrospective tax demand of about ₹22,100 crore breached fair and equitable treatment.
• Cairn v. India (award of 21 December 2020): under the India-UK BIT, the tribunal again found an FET breach over retrospective tax, and ordered India to pay about US$ 1.2 billion. Cairn then moved courts abroad to seize Indian government-linked assets.

After these cases, Parliament passed the Taxation Laws (Amendment) Act, 2021 (assent on 13 August 2021). It withdrew tax demands raised under the 2012 retrospective amendment for indirect transfers made before 28 May 2012, on condition that companies drop their pending cases and claims.

How India responded

India decided the old BITs gave foreign investors too much room and left the state too exposed. It adopted a new Model BIT (approved in December 2015) that kept ISDS but tightened it:

• Taxation measures are kept out of the treaty.
• Investors must first exhaust local remedies for at least five years.
• There is no MFN clause, so investors cannot "borrow" better terms from other treaties, as happened in White Industries.
• There are strict time limits for bringing claims.

India also began terminating most of its older BITs from 2016–17.

Commonly confused concepts

• ISDS vs State-to-State dispute settlement: in ISDS, a private company sues a government. In state-to-state settlement, as in the WTO Dispute Settlement Body, only governments can file cases against each other. A company cannot directly file a WTO case.
• Investment treaty arbitration vs commercial arbitration: commercial arbitration settles a contract dispute between two businesses (or a business and a state company, like White Industries vs Coal India). Investment treaty arbitration is based on a treaty and is against the state itself.
• ICSID vs UNCITRAL vs PCA: ICSID is an institution under the World Bank with its own convention. UNCITRAL is a UN body that writes rules; it does not hear cases itself. The PCA is an institution at The Hague (set up in 1899) that often administers cases run under UNCITRAL rules.
• ICSID Convention vs New York Convention (1958): the New York Convention is about recognising and enforcing foreign commercial arbitral awards. India ratified it in 1960. India is not a member of the ICSID Convention.
• Exhaustion of local remedies vs cooling-off period: a cooling-off period is simply time for talks before filing a case. Exhaustion of local remedies means actually going through the host country's courts and authorities first.

Issues, criticism and the way forward

• Sovereignty and "regulatory chill": critics argue that the fear of being sued may stop governments from making genuine public-interest laws on health, environment or tax. Supporters reply that treaties protect only against unfair or arbitrary actions.
• Cost and uncertainty: cases can take years and cost millions of dollars. Awards can be very large and different tribunals sometimes read similar clauses differently.
• Legitimacy of arbitrators: arbitrators are private lawyers chosen case by case, and there is usually no appeal. Critics question their independence and consistency.
• India's two roles: India is now also a big outward investor. Indian companies abroad need the same protection, so an overly strict model can hurt them too. Many foreign partners found the five-year local remedies rule too long, given delays in Indian courts, which slowed down BIT negotiations.
• Global reform efforts: since 2017, UNCITRAL Working Group III has been discussing ISDS reforms such as a code of conduct for arbitrators, an advisory centre, an appellate mechanism and a standing multilateral investment court. The EU favours a permanent Investment Court System in its newer agreements. The EU also withdrew from the Energy Charter Treaty (effective 28 June 2025), partly due to ISDS concerns.
• Way forward suggested by experts: keep ISDS as a last resort but make it fairer. Suggestions include shorter and realistic local remedies periods, faster commercial courts at home, clear definitions of FET and expropriation, transparency in proceedings, and carving out genuine public-policy areas like tax.

Concepts to Know

• Arbitration: a way of settling a dispute outside regular courts. Both sides agree to let a neutral person or panel (the arbitrator or tribunal) decide, and to accept the decision.
• Award: the final decision of an arbitral tribunal. It is like a court judgment.
• Host state / home state: the host state is the country where the investment is made. The home state is the country the investor comes from.
• Expropriation: when a government takes over private property. It can be direct (taking the factory) or indirect (rules so harsh that the property becomes useless).
• Retrospective tax: a tax law that applies to deals done in the past, before the law was made.
• UNCTAD: the UN Conference on Trade and Development, which tracks investment treaties and ISDS cases worldwide.
• Sovereign right: the power of a country to make its own laws and decisions without outside control.