What is indirect expropriation?
Indirect expropriation is a government measure that removes the use, control or value of an investment without formally taking title. In Biwater Gauff v Tanzania (ICSID Case No. ARB/05/22), the tribunal covered measures involving no "actual takings of title". Their effect is an "effective loss of management, use or control" (award of 24 July 2008, para 452). Our guide to investment treaty arbitration places the claim in a treaty case; the glossary entry on expropriation defines the term.
In Metalclad v Mexico (ICSID Case No. ARB(AF)/97/1), the company held federal permits for a hazardous waste landfill. On 5 December 1995 the Town Council of Guadalcazar denied the municipal construction permit. The tribunal found an indirect expropriation and awarded US$16,685,000 (award of 30 August 2000, paras 107 and 131).
What tests do tribunals apply to indirect expropriation?
Effect comes first. In Tecmed v Mexico (ICSID Case No. ARB(AF)/00/2), "the government's intention is less important than the effects of the measures on the owner of the assets" (award of 29 May 2003, para 116). Commentary calls this the sole effects approach.
Biwater adds a severity threshold: "a substantial deprivation of rights, for at least a meaningful period of time" (para 463). Tecmed adds proportionality: a "reasonable relationship of proportionality" between the burden on the investor and the aim of the measure (para 122).
When is regulation not an expropriation?
A non-discriminatory regulation for a public purpose is generally not an expropriation unless the government gave specific commitments. In Methanex v United States (UNCITRAL), the final award of 3 August 2005 treated California's ban as lawful regulation (Part IV, Chapter D, paras 7 and 15). The ban "was made for a public purpose, was non-discriminatory and was accomplished with due process". The Article 1110 claim failed.
Philip Morris v Uruguay (ICSID Case No. ARB/10/7) reached the same result on two grounds. First, "as long as sufficient value remains after the Challenged Measures are implemented, there is no expropriation" (award of 8 July 2016, para 286). Second, the measures were a valid exercise of police powers (para 307). Such action must be taken in good faith for the public welfare and be "non-discriminatory and proportionate" (para 305).
A public purpose does not close the inquiry, though. Tecmed accepted that environmental measures are not excluded (para 121). It still found that the refusal to renew a landfill permit and its effects "amount to an expropriation in violation of Article 5" (para 151).
What is creeping expropriation?
Creeping expropriation is expropriation by accumulation: steps that together have the effect of a taking. In Siemens v Argentina (ICSID Case No. ARB/02/8), the tribunal said it refers "to a process, to steps that eventually have the effect of an expropriation". Each step "by itself may not be significant", and the last is "similar to the straw that breaks the camel's back" (award dispatched 6 February 2007, para 263).
Biwater took the same view and weighed "the cumulative effect of a series of individual and connected acts" (para 455). The process can also stop. If it stops before it reaches that point, Siemens says, "expropriation would not occur".
What do real indirect expropriation examples look like?
Four awards found expropriation after a dated sequence.
- Metalclad v Mexico: an ecological decree of September 1997 "had the effect of barring forever the operation of the landfill" (para 109). The tribunal "need not decide or consider the motivation or intent" (para 111).
- Tecmed v Mexico: inspections, a fine and protests came before the November 1998 refusal to renew a landfill permit. The award was US$5,533,017.12 (paras 107 to 109 and 201).
- Biwater Gauff v Tanzania: four acts, from a minister's announcement on 13 May 2005 to the seizure of City Water's assets on 1 June, "amount to an expropriation" (para 519). The tribunal also found a breach of fair and equitable treatment (para 814); see our guide to the FET standard.
- Siemens v Argentina: a demand to change the contract's economics, then suspended project components and unpaid compensation, ending with Decree 669/01 (paras 256 to 259 and 271).
Which measures lead to claims most often? No verified count exists. The ICSID 2025 caseload release gives sector shares (mining 24%, oil and gas 21%, construction 16% of 63 new cases) but no breakdown by type of measure.
How can lawyers spot a creeping expropriation before a claim is filed?
Keep a dated list of every measure against one investment and compare it with the awards above.
- A government reopens the deal economics after a change of administration. In Siemens, changes were required "when the change of Government occurred and nearly a year before the fiscal emergency was declared" (para 256).
- Inspections, fines and protests build up before a renewal. In Tecmed they ran from October 1997 to the refusal in November 1998.
- A minister announces the outcome first. In Biwater, termination was announced on 13 May 2005 "against the backdrop of forthcoming elections" (para 497).
- Measures are never revoked. In Siemens they "stand as part of a gradual process" (para 271).
ICSID registered Biwater five months after the seizure of 1 June 2005, Metalclad about 13 months after the permit refusal and Tecmed about 21 months after the non-renewal. That is the working window. Our page on early warning of investment treaty disputes covers monitoring.
Hindsight flatters this list. A run of measures is a reason to look closer, nothing more.
What this means for practice
We think the first unusual request, such as a demand to reopen a contract, is the entry to log. In Siemens the process began "more than a year" before Decree 669/01 (para 273).
Monitoring tools such as DSPT Finder group related coverage into one story with a timeline of how a dispute unfolded, which helps a team keep that dated file.
For more on this topic, see how to detect investment treaty disputes early and resource nationalism and expropriation in mining and energy.
Frequently asked questions
What is indirect expropriation under an investment treaty?
Indirect expropriation is a government measure that removes the value or use of an investment while title stays with the investor. The Tecmed tribunal treated measures as expropriatory if they are "irreversible and permanent" and neutralise the value of the assets.
What is the difference between indirect and creeping expropriation?
Indirect expropriation describes the effect: value lost without a transfer of title. Creeping expropriation describes the route: a series of steps that reach that effect together. One measure can be an indirect expropriation; a creeping one needs a series, as in Siemens and Biwater.
How do tribunals tell expropriation from legitimate regulation?
They ask whether the measure was taken in good faith for the public welfare, without discrimination and in proportion to its aim. Those police-powers conditions defeated the claim in Philip Morris v Uruguay (2016), yet Tecmed found expropriation under a proportionality test.
Does an indirect expropriation claim need the investor to lose money?
Not necessarily. The Biwater tribunal required effects "of a certain severity", which need not be economic, and treated the absence of economic loss as "primarily a matter of causation and quantum". It found expropriation yet dismissed the damages claims.
What are the first warning signs of a creeping expropriation?
A run of measures against one investor, such as a demand to reopen a contract after a change of government, or inspections and fines before a renewal. Monitoring tools such as DSPT Finder surface new government actions daily, so a business development team can act before the notice of intent is served.