A new educational approach to sustainable development is emerging in the entrepreneurship literature. However, because business schools encourage a ‘profit-first mentality’, critics question their ability to deliver sustainability-related education programmes. This article adapts the theory of planned behaviour to examine attitudes to an entrepreneurial form of sustainability education. The relationship between nascent entrepreneurs’ intentions to exploit learning and the extent of a profit-first mentality is examined. The study utilises data from 257 nascent entrepreneurs participating in a business start-up programme. Structural equation modelling is used to test a series of hypotheses which examine links between sustainability education and nascent entrepreneurs’ attitudes. The results indicate a strong relationship between perception of learning benefits and intentions of nascent entrepreneurs to exploit those benefits. Although a profit-first mentality is negatively related to perceptions of benefit, learning itself is not affected. The results have implications for research, policy and the practice of entrepreneurship education.