AEI in this guide refers to the Agencia Estatal de Investigación, Spain’s national research funding agency — not the American Enterprise Institute, the Washington, D.C. policy think tank that shares the same three-letter acronym in English-language search results. If you were looking for the U.S. think tank, this is not that page. This guide covers Spain’s AEI: what it is, how it is organized, and the main funding instruments a research administrator or investigator needs to understand when working with AEI-funded projects or Spanish collaborators.
Quick answer
- AEI (Agencia Estatal de Investigación) is Spain’s principal state agency for funding, evaluating, and monitoring scientific and technical research. It was created by Real Decreto 1067/2015 (27 November 2015), under the legal framework of Spain’s Science, Technology and Innovation Law (Ley 14/2011).
- AEI operates under Spain’s Ministry of Science, Innovation and Universities (Ministerio de Ciencia, Innovación y Universidades, MICIU) — it is the funding-agency arm that executes national research policy, not the ministry itself.
- AEI’s competitive calls sit within the multi-year State Plan for Scientific, Technical and Innovation Research (Plan Estatal de Investigación Científica, Técnica y de Innovación), Spain’s national counterpart to the EU’s Horizon Europe framework.
- Its main instrument families cover basic-research project grants, talent/career programs (including the well-known Ramón y Cajal tenure-track fellowship and the ATRAE talent-attraction program), and research-infrastructure funding.
- Not the American Enterprise Institute (aei.org), a private U.S. think tank on economic and foreign policy with no research-funding role in Spain. The acronym collision is coincidental.
What AEI is and how it fits into Spain’s government structure
The Agencia Estatal de Investigación was established as a financing agent (agente financiador) under Spain’s Ley 14/2011, de 1 de junio, de la Ciencia, la Tecnología y la Innovación (the Science, Technology and Innovation Law). Its founding instrument, Real Decreto 1067/2015, both created the agency and approved its statute, published in the Boletín Oficial del Estado (BOE) on 28 November 2015. The stated purpose was to modernize the public management of Spain’s state-level R&D&I policy by consolidating financing, evaluation, award, and monitoring of research activity into a single specialized agency, distinct from the ministry that sets policy.
Institutionally, AEI sits beneath the ministry currently responsible for science policy — the Ministerio de Ciencia, Innovación y Universidades (MICIU). Ministry names and structures in Spain have changed across government terms (the research-funding function has at various points sat under “Ministerio de Economía y Competitividad,” “Ministerio de Ciencia e Innovación,” and similar labels), but AEI itself, as the operational funding agency, has continued across those reorganizations. For a research administrator, the practical takeaway is: policy direction and budget allocation come from the ministry; call design, evaluation panels, award decisions, and grant administration are executed by AEI.
AEI’s role is comparable, in function, to national research councils elsewhere — UK Research and Innovation (UKRI) in the United Kingdom, the National Science Foundation (NSF) in the United States, or Chile’s ANID. Like those bodies, AEI does not itself decide national science policy in isolation; it implements policy set at the ministerial level through competitive, peer-reviewed funding calls (convocatorias).
AEI’s main funding instrument families
AEI’s portfolio is organized around the State Plan for Scientific, Technical and Innovation Research, which groups calls into broad program lines. The families a research administrator is most likely to encounter are:
Knowledge-generation and project grants
AEI’s largest funding line by volume of grants is competitive project funding for investigator-initiated basic and applied research, generally referred to under headings such as Proyectos de Generación de Conocimiento (Knowledge Generation Projects) and Proyectos Orientados a los Retos de la Sociedad (Challenge-Oriented Projects). These function much like a standard competitive grant mechanism elsewhere: a principal investigator submits a proposal, it is peer-reviewed by an AEI evaluation panel, and funded projects typically run three to four years covering personnel, equipment, and running costs.
Talent and career-stage programs
AEI administers Spain’s flagship instruments for recruiting and retaining research talent at specific career stages:
- Ramón y Cajal (RyC) — a competitive, tenure-track-oriented postdoctoral contract program, first called in 2001, designed to help outstanding postdoctoral researchers establish an independent line of research at a Spanish host institution with a pathway toward a stabilized (tenured) position. It is one of the best-known named fellowship programs in Spanish science and is frequently referenced on CVs of Spain-based investigators.
- ATRAE — part of Spain’s Plan for the Attraction and Retention of Scientific and Innovation Talent, aimed specifically at researchers with a substantial track record built abroad. ATRAE calls have run alongside Ramón y Cajal calls, with eligibility built around a period of professional linkage to research organizations outside Spain.
- Juan de la Cierva — a family of earlier-career postdoctoral contracts (commonly split into a training-stage and an incorporation-stage line) intended to bridge recent doctoral graduates into independent research careers, distinct from the more senior, tenure-track-oriented Ramón y Cajal line.
- FPI (Formación de Personal Investigador) — predoctoral contracts attached to AEI-funded research projects, funding doctoral students within the scope of an already-awarded project grant.
Administratively, these talent programs matter to a research office in a different way than project grants: the contract is typically issued to the researcher through the host institution, and eligibility windows (years since PhD, time spent abroad, prior AEI funding history) are strictly enforced, so verifying eligibility before submission is a common pre-award task when advising an incoming or outgoing researcher.
Excellence accreditation for research centers and units
AEI administers Spain’s Severo Ochoa (for research centers) and María de Maeztu (for university research units/institutes) excellence accreditation programs. These do not fund individual projects; rather, they award multi-year, institution-level recognition and supplementary funding to centers and units that demonstrate sustained international-caliber research performance, intended to strengthen their competitiveness for further national and EU funding.
Research infrastructure
AEI also funds acquisition and upgrade of scientific equipment and contributes to the operating support of Spain’s ICTS (Instalaciones Científicas y Técnicas Singulares) — large, unique scientific and technical facilities of national significance, comparable in concept to shared national research infrastructure programs elsewhere. This sits alongside, but is organizationally distinct from, institution-level research infrastructure funding and core-facility cost recovery practices that individual universities manage internally.
How AEI relates to the State Plan and to EU funding
AEI’s calls are issued under the umbrella of the multi-year Plan Estatal de Investigación Científica, Técnica y de Innovación (State Plan for Scientific, Technical and Innovation Research), which sets Spain’s national R&D&I priorities and funding envelopes over a multi-year period, in coordination with the EU’s own Horizon Europe framework. Spanish researchers and institutions frequently hold funding from both tracks simultaneously — national AEI project grants alongside EU instruments such as European Research Council (ERC) grants or Marie Skłodowska-Curie Actions (MSCA) fellowships — and AEI’s own talent programs (Ramón y Cajal, ATRAE) are explicitly positioned as complementary to, and in some calls co-funded with, EU talent-attraction mechanisms.
What this means for international research offices and partners
For a research administrator outside Spain evaluating a collaboration, subaward, or a candidate’s CV involving AEI funding:
- An AEI-funded principal investigator role on a Spanish project grant generally indicates the individual passed a national competitive peer-review process comparable in rigor to equivalent national funding councils elsewhere.
- A Ramón y Cajal or ATRAE contract on a CV signals a competitive, career-stage-specific award tied to a specific host institution in Spain, not a fellowship the researcher can freely transfer.
- AEI grant numbers and call codes (e.g., referencing a specific convocatoria year and program line) are the correct identifiers to request when verifying a Spanish collaborator’s funding history or when citing the funding source in a joint publication’s acknowledgments.
- Severo Ochoa/María de Maeztu accreditation on an institution or unit is a signal of sustained excellence status, not evidence that a specific project was AEI-funded.
Frequently asked questions
Is AEI Spain the same as the American Enterprise Institute?
No. They share only the acronym. The Agencia Estatal de Investigación is a Spanish government agency that funds scientific research; the American Enterprise Institute is a private, U.S.-based public-policy think tank. They have no institutional relationship.
What ministry does AEI report to?
As of this writing, AEI operates under Spain’s Ministerio de Ciencia, Innovación y Universidades (MICIU). The specific ministry name has changed across different Spanish government terms as portfolios were reorganized; AEI itself, created by Real Decreto 1067/2015, has continued operating as the funding-agency arm regardless of which ministry currently holds the science portfolio.
What is Ramón y Cajal, and how is it different from ATRAE?
Ramón y Cajal is AEI’s flagship competitive postdoctoral contract program aimed at helping outstanding researchers establish an independent research line in Spain with a pathway toward a stabilized position; it has run annual calls since 2001. ATRAE is a related but distinct talent-attraction program targeted specifically at researchers with a substantial track record built outside Spain, and has in some years been run alongside Ramón y Cajal calls with dedicated slots and terms for internationally based candidates.
Does AEI fund researchers outside Spain?
AEI’s core project and talent programs are designed around a Spanish host institution — the contract or grant is administered through that institution. International researchers become eligible when they are hired by, or collaborate with, a Spain-based host (for example, taking up a Ramón y Cajal or ATRAE contract at a Spanish university or research center), rather than applying directly as an unaffiliated international applicant.
Where can I find official, current AEI funding calls?
AEI publishes its live and closed calls (convocatorias) directly at aei.gob.es. Because call names, budgets, and eligibility criteria are updated annually, always confirm current terms against the official call text rather than a secondary summary, including this guide.
Related CASRAI resources
- Grants Management pillar — the full cluster of research-administration guides this page belongs to.
- ANID Chile & Fondecyt — a comparable national funding-agency structure guide for Chile.
- Human Frontier Science Program (HFSP) — a multinational funder Spanish researchers may also hold awards from.
- Postdoctoral fellowship — the general concept underlying programs like Ramón y Cajal and Juan de la Cierva.
- European Research Council (ERC) — the EU-level funder Spanish AEI grants are frequently held alongside.
- MSCA Postdoctoral Fellowship — the EU talent program most comparable to AEI’s own postdoctoral lines.
- Principal investigator — role definition referenced throughout AEI’s project-grant instruments.
