Purpose: This paper aims to examine the variety of approaches to curriculum development for enterprise education developed for schools, further, and higher education under an Entrepreneurship Action Plan in Wales and to consider the sustainability issues for delivery in these sectors. Design/methodology/approach: This investigation adopted a case study approach that obtained post-development information obtained from stakeholders in curriculum development in the three sectors based on semi-structured interviews. The paper presents an analysis of the curriculum development initiatives in schools, further and higher education based on a three-stage categorisation model: inspiration, information and implementation and activities involving cross-sector approaches. Findings: Stakeholders generally provided positive feedback toward the curriculum development material from each sector. Curriculum development applied to fostering enterprising qualities and practical support produced a broad span of diverse actions across Wales covering inspiring, information and implementation. There are consistent threads in enterprise content of attitude, creativity, relationships and organisation. Curriculum content needs to be maintained and updated in a sustainable way and a sustainability framework is proposed together with a set of recommendations for each sector. Practical implications: Suggestions on how to further strengthen and develop the sustainability of enterprise education programmes are provided for the three sectors: schools, further, and higher education, for example, through centralised curriculum support, the extension of credit-based courses and structured staff development for stakeholders. Originality/value: Enterprise education is acknowledged to have an influence on the knowledge, skills and attitudes of students and can contribute to entrepreneurship. Curriculum development in enterprise education enables educational institutions to stimulate interest of students and to foster entrepreneurial qualities among potential entrepreneurs in society. Approaches to curriculum development for three educational sectors are examined, categorised and recommendations advanced for sustaining such enterprise education programmes over an extended period of time. (Contains 6 tables.)