During the period of austerity that we now face, the National Health Service (NHS), including mental health services, will have to make efficiency savings at a time when demand for services is likely to rise. It is critical to highlight that investment in evidence-based prevention, early intervention and treatment for mental disorders can have economic benefits that go far beyond the health sector. Many potential areas for efficiency savings, such as resources invested in management and administration, are relevant across the whole of the health system. The economic downturn may, however, also present a specific opportunity for radical innovation within the mental health system.