This report is the ninth edition of the OECD's Tax Administration Series. It provides internationally comparative data on aspects of tax systems and their administration in 59 advanced and emerging economies.

Description and extensions of the capital income effective tax rate literature / M.M. Ruiz, F. Gérard, M. ; p. 11- 41.

This book captures the critical role of taxation in shaping government responsiveness and accountability in developing countries.

Modern tax administrations seek to optimize tax collections while minimizing administration costs and taxpayer compliance costs. Experience shows that voluntary compliance is best achieved through a system of self-assessment. Many tax administrations have introduced self-assessment principles in the income tax law but the legal authority is not being consistently applied. They continue to rely heavily on “desk” auditing a majority of tax returns, while risk management practices remain largely underdeveloped and/or underutilized. There is also plenty of opportunity in many countries to enhance the design and delivery of client-focused taxpayer service programs, and better engage with the private sector and other stakeholders.

Recent decades have witnessed important progress in strengthening tax systems in developing countries. Yet many areas of reform have remained stubbornly resistant to major improvements; overall revenue collection still falls short of what is needed to support effective governance and service delivery, while tax collection is too often characterized by high rates of evasion among large corporations and the rich and disproportionate, though often hidden, burdens on lower-income groups. As countries around the world deal with large COVID-19-induced debt burdens, a focus on strengthening tax systems is especially timely. Innovations in Tax Compliance draws on recent research and experience to present a new conceptual framework to guide more effective approaches to reform. Building on the achievements of recent decades, it argues for an expanded focus on the overlapping goals of building trust, navigating political resistance, and tailoring reform to unique local contexts through a focus on identifying the most binding constraints on reform. This focus, it argues, can lead not only to greater compliance, increased fairness, and higher revenues, but can also contribute to the building of state capacity, sustained political support for further reforms, and stronger fiscal contracts between citizens and governments.

This paper examines the impact of e-invoicing on firm tax compliance and performance using administrative tax data and quasi-experimental variation in the rollout of VAT electronic invoicing in Peru. We find that e-invoicing increases reported firm sales, purchases and value-added by over 5 percent in the first year after adoption. The impact is concentrated among smaller firms and sectors with higher rates of non-compliance, suggesting that e-invoicing enhances compliance by lowering compliance costs and strengthening deterrence. The reform’s positive effects on tax collection are hindered by shortcomings in the VAT refund mechanism in Peru, suggesting that digital tools such as e-invoicing should be complemented by other reforms to improve revenue mobilization.

People pay taxes for two reasons. On the positive side, most people recognize, even if grudgingly, that payment of tax is a duty of citizenship. On the negative side, they know that the law requires payment, that evasion is a crime, and that willful failure to pay taxes is punishable by fines or imprisonment. The practical questions for tax administration are how to strengthen each of these motives to comply with the law. How much should be spent on enforcement and how should enforcement be organized to promote these objectives and achieve the best results per dollar spent? Over the last few years, the U.S. Congress has restricted spending on tax administration, forcing the Internal Revenue Service to curtail enforcement activities, at the same time, that the number of individual filers has increased, tax rules have become more complex, and more business have become multinational operations. But if too many cases of tax evasion go undetected and unpunished, those who may have grudgingly paid their taxes may soon find it easier to join the scofflaws. These events in combination have created a genuine crisis in tax administration. The chapters in this volume evaluate the capacity of authorities to enforce the tax laws in a modern, global economy and examine the implications of failing to do so. Specific aspects of tax law, including tax shelters, issues relating to small businesses, tax software, role of tax preparers, and the objectives of tax simplification are examined in detail. The volume also builds a conceptual basis for future scholarship, with regard not only to tax administration, but also to such fundamental questions as whether taxpayers respond mostly to economic incentives or are influenced by their experiences with the filing process and what is the proper framework for evaluating the allocation of resources within the IRS.