The Spanish economy experienced significantly weaker labour productivity growth than other OECD economies and failed to catch up with the most advanced economies in the period 1996-2007. In recent years labour productivity growth has accelerated, but this recovery is likely to be due to cyclical and temporary factors. The aim of this paper is to identify what factors weigh on weak trend productivity growth. The relatively weak performance largely reflects the low growth of total factor productivity within a wide range of sectors, with very limited impact of composition effects, while the capital stock and educational attainment of the workforce have grown relatively strongly. The paper investigates the role of some institutions in deterring innovation, competition and the growth of successful firms. It argues that Spain needs to have a more flexible labour market and collective bargaining system to improve productivity performance. Productivity performance would also benefit from a more flexible business environment in such a way that both entry and exit of firms in the economy are less costly, including a reform of bankruptcy legislation, steps to make civil judicial procedures more efficient and a greater reduction of barriers to entry into the retail trade sector.