Technology business incubators (TBIs) can be used strategically as mechanisms for innovation and economic development processes in countries, states, municipalities, regions and companies. The study of their management model in terms of organisational efficiency and value creation is important. In this context, the general aim of this study was to evaluate the business models of incubators of technology-based Brazilian and Portuguese companies. With this specific aim, the study sought to: 1) map the resources that affect costs and/or generate revenue; 2) study the nature of partnerships; 3) analyse value propositions; 4) propose a business model for the sustainability of TBIs. The methodology employed was qualitative in nature and the multiple case study method was used at ten TBIs, six of which were Brazilian and four Portuguese. The result was the proposal of a business model for TBIs that includes good incubation practices for companies and helps incubators to achieve sustainability through organisational efficiency and value creation.