Organisations are only as good as their people, so it is vital for business success that firms identify and recruit the best individuals. Yet there is growing evidence that when it comes to making the most of their assets, some of Britain’s leading employers are missing out – to the cost of both the bottom line, and fairness. This document sets out the current position regarding social mobility in the UK and what could be gained by business in changing it for the better. It shows that far from opportunities being open to all, there are serious barriers to some of our most talented and driven people getting ahead, and that businesses are sometimes contributing to these barriers. This is costly for individual firms, and the economy as a whole. It shows how these problems can be overcome by recommending the simple, practical ways that any firm can make a difference and it calls on employers and government to make these steps the basis for a refreshed version of the Government’s leading vehicle for social mobility efforts by UK businesses: the Social Mobility Business Compact.