The federal government loses both individual and corporate income tax revenue from the shifting of profits and income into low-tax countries, often referred to as tax havens. The revenue losses from this tax avoidance and evasion are difficult to estimate, but some have suggested that the annual cost of offshore tax abuses may be around $100 billion per year. International tax avoidance can arise from large multinational corporations who shift profits into low-tax foreign subsidiaries or wealthy individual investors who set up secret bank accounts in tax haven countries. This book explores tax havens, as well as the issues in international avoidance and evasion.