procedures, and the number of payments required through the year, across 176 countries. The 'easiest' countries in which to pay taxes are located in the Middle East with the UAE ranking first, followed by Qatar and Saudi Arabia, most likely reflecting low tax regimes in those countries. Countries in Sub-Saharan Africa are among the 'hardest' to pay with the Central African Republic, Republic of Congo, Guinea and Chad in the bottom 5, reflecting higher total tax rates and a greater administrative burden to comply. Key facts The below facts were compiled by EPS PEAKS researchers: Trade liberalization has led to a decline in trade taxes as a share of total revenues and GDP. Resource-rich countries tend to collect more revenue as a share of GDP, but this is more volatile. Sub-Saharan African countries that are resource-rich have performed better tax collecting than non-resource-rich countries, but revenues are more volatile from year to year. By strengthening revenue management, there are huge opportunities for investment for development and growth. Developing countries have an informal sector representing an average of around 40%, perhaps up to 60% in some. Informal sectors feature many small informal traders who may not be efficient in bringing into the tax net since the cost of collection is high and revenue potential limited (although there are broader governance benefits). There is also an issue of non-compliant companies who are 'hard to tax', evading taxes and should be brought into the tax net. In many low-income countries, the majority of revenue is collected from a narrow tax base, sometimes because of a limited range of taxable economic activities. There is therefore dependence on few taxpayers, often multinationals, that can exacerbate the revenue challenge by minimizing their tax liability, in some cases abusing a lack of capacity in revenue authorities, sometimes through transfer pricing abuse. Developing and developed countries face huge challenges in taxing multinationals and international citizens. Estimates of tax revenue losses from evasion and avoidance in developing countries are limited by a lack of data and methodological shortcomings, but some estimates are significant. Countries use incentives to attract investment but doing this may be unnecessarily giving up revenue as evidence suggests that investors are influenced more by economic fundamentals like market size, infrastructure, and skills, and only marginally by tax incentives (IFC investor surveys). For example, even though the Government of Armenia supports the IT sector and seeks to