International Institute for Strategic Studies: defence data, strategic convening and sponsor transparency

Why IISS matters

The International Institute for Strategic Studies (IISS) is an independent research institute focused on international security, military capabilities, geopolitical risk and conflict. Its influence comes from the data it compiles, its publications, specialist analysis and high-level conferences where officials, military leaders, businesses and researchers meet. It does not command armed forces or make government policy. Its work can nevertheless shape how defence spending, military readiness, procurement, strategic competition and conflict risks are understood by Western governments and markets. The public-interest question is how reliable its analysis is, who pays for it and how readers should interpret the presence of governments and defence companies among its supporters.

Institutional role and research output

IISS describes itself as an institute that produces facts, analysis and strategic dialogue for governments, businesses, media and experts. Its analysts collect and validate defence data on more than 170 countries. The institute's best-known publication, The Military Balance, assesses military organisations, personnel, equipment inventories and defence budgets, alongside regional analysis of defence policy and procurement. Its Military Balance Plus database provides searchable data and tools for comparing military capabilities and trends.

The Defence and Military Analysis Programme examines defence policy, military capabilities, defence expenditure, procurement, industry and the effect of new technologies on armed forces. The institute emphasises that equipment inventories alone do not determine military capability: training, leadership, maintenance, readiness and organisational context also matter. This distinction is important when analysts or officials cite headline equipment counts as a proxy for combat power.

IISS also researches regional security, conflict, cyber power and geo-economics. Its work includes conflict surveys, analysis of military attrition in Ukraine, Western rearmament, the cost of European strategic autonomy and the security implications of emerging technologies. It offers tailored geopolitical advice and data products to private-sector clients. These activities make IISS relevant not only to defence ministries but also to insurers, investors, contractors, shipping companies and firms exposed to geopolitical disruption.

Governance and institutional independence

IISS operates as an independent institute rather than an intergovernmental organisation or government agency. Its London headquarters is Arundel House at 6 Temple Place; it also lists offices in Washington, Singapore, Bahrain and Berlin. Its international footprint supports research and dialogue across multiple security regions. The institute's published material describes a leadership and governance structure with a governing council and executive management, and its public-facing work stresses research independence.

The word independent should not be read as financially self-sufficient or free of all institutional relationships. IISS explicitly publishes the sources of its principal income. Independence in this context concerns its institutional status and research responsibility; readers still need to examine who funds programmes, conferences, research work and publications. An organisation can retain formal control over its analysis while relying on sponsorship and commissioned work to finance that activity.

Funding, sponsors and financial interests

IISS publishes a funding disclosure covering membership, sponsorship, royalties, research and conference activities. Its disclosed principal income sources for the financial year ended 30 September 2024 include governments, foundations, corporate partners and individuals. The listed contributors include major defence contractors and technology companies such as BAE Systems, Lockheed Martin, Northrop Grumman, RTX, Saab, Airbus, Boeing and Palantir, as well as public authorities and other businesses. The institute groups income into membership, sponsorship and royalties, and research and conference activities. The published tiers show ranges rather than the exact amount paid by every supporter.

This disclosure is especially relevant because IISS produces research on defence procurement, military capabilities and strategic technology. Companies that manufacture defence systems may have a legitimate interest in policy debates about capability gaps, industrial capacity and procurement priorities. Their presence on a funding list is not proof that the institute's analysis favours them or that a contract was influenced. It is a reason to check the disclosure attached to a specific research output, event or data product.

The institute also earns revenue from publications and databases, host-nation support for conferences, corporate sponsorship, research work, consultancy and donations from individuals and foundations. These sources create a mixed funding model. Subscription and publication revenue can connect income to the value of research products; conference support can help fund expensive convening; corporate sponsorship can create relationships with regulated or procurement-dependent industries; and public funding can support research or dialogue considered strategically useful by governments.

Who benefits and who pays

Defence ministries, armed forces and parliamentary researchers benefit from structured comparative data on force composition, equipment and defence expenditure. Businesses use geopolitical analysis to assess market access, sanctions, supply-chain exposure, security risks and procurement trends. Journalists and academics use IISS publications as a reference point for analysing military balance and conflict. Participants in IISS conferences gain access to senior officials and specialists, although attendance does not itself prove influence over official decisions.

The immediate payers are subscribers, buyers of publications and databases, conference host governments, corporate sponsors, research clients and private donors. Taxpayers fund the government contributions and host-nation support that appear in the disclosure. Companies pay from commercial budgets, foundations and individuals from philanthropic resources. The costs also include the risk of perceived conflicts: when an organisation studies sectors whose leading firms are among its sponsors, readers need clear project-level disclosure and robust editorial standards.

Criticism and counter-view

The strongest criticism is that defence institutes funded by government and industry may face pressure to focus on questions that funders consider important, or may give sponsor interests greater access to policy discussions. A defence company can benefit from a public narrative that emphasises a capability gap; a government can benefit from research that validates a strategic priority. These are plausible incentives, not evidence that a particular IISS conclusion is false.

The counterargument is that independent specialist institutes can produce longitudinal data and comparative analysis that governments and companies cannot easily replicate alone. IISS publishes funding tiers, identifies its principal supporters and maintains research programmes that draw on open-source evidence. The appropriate test is to compare individual findings with primary defence budgets, procurement documents, official force data and independent assessments, while checking the relevant sponsor disclosures.

What to watch

Watch annual funding disclosures, changes in sponsor tiers, host-nation support for major conferences, methodology notes for The Military Balance, changes to data coverage and corrections to published assessments. For defence spending, compare IISS estimates with national budget documents and NATO's published expenditure series. For capability claims, compare inventory counts with readiness, training, sustainment and personnel evidence.

Related on Factrail

IISS can be compared with RAND (opens in a new tab), the Center for Strategic and International Studies (opens in a new tab) and the German Marshall Fund of the United States (opens in a new tab). Each has a different research and funding model; IISS is particularly distinguished by its military data products and strategic conferences.

Sources

IISS About and Research (opens in a new tab), Contact and Offices (opens in a new tab), Funding: Membership, Sponsorship and Royalties (opens in a new tab), The Military Balance 2026 (opens in a new tab), Defence and Military Analysis Programme (opens in a new tab) and The Military Balance publication page (opens in a new tab) document its research model, data products, funding sources and global security role.