Eligible countries:described in Annex B of the Work Programme General Annexes. A number of non-EU/non-Associated Countries that are not automatically eligible for funding have made specific provisions for making funding available for their participants in Horizon Europe projects.
For other eligibility criteria, see https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/support/faq/50932?topicIdentifier=HORIZON-CL5-2024-D4-02-04&topicIdentifierId=HORIZON-CL5-2024-D4-02-04&isQA=true.