This paper analyzes budget credibility from the information provided in a dataset created by World Bank that includes cross country data on government spending - both as originally approved and as finally executed over the period 2009-2017. Credibility here means extent to which actual spending matches the approved budget - both in terms of overall revenue and expenditure, and in terms of the allocations and spending in specific sectors, such as health or education. It uses data from a diverse sample of 35 countries to look at both, deviations in aggregate spending and at shifts in the composition of budgets during their implementation. The evidence demonstrates that budget credibility is an important challenge for governments and can undermine countries’ efforts to live up to the commitments that they have signed as part of the UN 2030 Agenda for Sustainable Development. Key findings of this paper include: