The book describes the difficulties of the current international corporate income tax system. It starts by describing its origins and how changes, such as the development of multinational enterprises and digitalization have created fundamental problems, not foreseen at its inception. These include tax competition—as governments try to attract tax bases through low tax rates or incentives, and profit shifting, as companies avoid tax by reporting profits in jurisdictions with lower tax rates. The book then discusses solutions, including both evolutionary changes to the current system and fundamental reform options. It covers both reform efforts already under way, for example under the Inclusive Framework at the OECD, and potential radical reform ideas developed by academics.

This paper describes, and where possible tentatively quantifies, likely tax spillovers from the U.S. corporate income tax reform that was part of the broader 2017 tax reform. It calculates effective tax rates under various assumptions, showing among other findings, how the interest limitation and the Foreign Derived Intangible Income provision can raise or reduce rates. It tentatively estimates that under constant policies elsewhere, the rate cut will reduce tax revenue from multinationals in other countries by on average 1.6 to 5.2 percent. If other countries react in line with historical reaction functions, the revenue loss from multinationals rises to an average of 4.5 to 13.5 percent. The paper also discusses profit-shifting, real location, and policy reactions from the more complex features of the reform.

This paper assembles a new dataset on corporate income tax regimes in 50 emerging and developing economies over 1996-2007 and analyzes their impact on corporate tax revenues and domestic and foreign investment. It computes effective tax rates to take account of complicated special regimes, such as partial tax holidays, temporarily reduced rates and increased investment allowances. There is evidence of a partial race to the bottom: countries have been under pressure to lower tax rates in order to lure and boost investment. In the case of standard tax systems (i.e. tax rules applying under normal circumstances), the effective tax rate reductions have not been larger than those witnessed in advanced economies, and revenues have held up well over the sample period. However, a race to the bottom is evident among special regimes, most notably in the case of Africa, creating effectively a parallel tax system where rates have fallen to almost zero. Regression analysis reveals higher tax rates adversely affect domestic investment and FDI, but do raise revenues in the short-run.

This book was first published in 2007. Most countries levy taxes on corporations, but the impact - and therefore the wisdom - of such taxes is highly controversial among economists. Does the burden of these taxes fall on wealthy shareowners, or is it passed along to those who work for, or buy the products of, corporations? Can a country with high corporate taxes remain competitive in the global economy? This book features research by leading economists and accountants that sheds light on these and related questions, including how taxes affect corporate dividend policy, stock market value, avoidance, and evasion. The studies promise to inform both future tax policy and regulatory policy, especially in light of the Sarbanes-Oxley Act and other actions by the Securities and Exchange Commission that are having profound effects on the market for tax planning and auditing in the wake of the well-publicized accounting scandals in Enron and WorldCom.

Many economists and policymakers believe that the U.S. corporate tax system is in need of reform. There is, however, disagreement over why the corporate tax system needs to be reformed, and what specific policy measures should be included in a reform. To assist policymakers in designing and evaluating corporate tax proposals, this report (1) briefly reviews the current U.S. corporate tax system; (2) discusses economic factors that may be considered in the corporate tax reform debate; and (3) presents corporate tax reform policy options, including a brief discussion of current corporate tax reform proposals. The current U.S. corporate income tax system generally taxes corporate income at a rate of 35%. This tax is applied to income earned domestically and abroad, although taxes on certain income earned abroad can be deferred indefinitely if that income remains overseas. The U.S. corporate tax system also contains a number of deductions, exemptions, deferrals, and tax credits, often referred to as "tax expenditures." Collectively, these provisions reduce the effective tax rate paid by many U.S. corporations below the 35% statutory rate. In 2011, the sum of all corporate tax expenditures was $158.8 billion. The significance of the corporate tax as a federal revenue source has declined over time. At its post-WWII peak in 1952, the corporate tax generated 32.1% of all federal tax revenue. In 2010, the corporate tax accounted for 8.9% of federal tax revenue. The decline in corporate revenues is a combination of decreasing effective tax rates, an increasing fraction of business activity that is being carried out by pass-through entities (particularly partnerships and S corporations, which are not subject to the corporate tax), and a decline in corporate sector profitability. A particular aspect of the corporate tax system that receives substantial attention is the 35% statutory corporate tax rate. Although the U.S. has the world's highest statutory corporate tax rate, the U.S. effective corporate tax rate is similar to the Organization for Economic Co-operation and Development (OECD) average. Further, the U.S. collects less in corporate tax revenue relative to Gross Domestic Production (GDP) (1.9% in 2009) than the average of other OECD countries (2.8% in 2009). This report discusses a number of economic considerations that may be made while evaluating various corporate tax reform proposals. These might include analyses of the likely effect on households of certain reforms (also known as incidence analysis). Policymakers might also want to consider how certain corporate tax provisions contribute to the allocation of economic resources, choosing policies that promote an efficient use of resources. Other goals of corporate tax reform may include designing a system that is simple to comply with and administer, while also promoting competitiveness of U.S. corporations. Commonly discussed corporate tax reforms include policies that would broaden the tax base (i.e., eliminate tax expenditures) to finance reduced corporate tax rates. Concerns that the U.S. corporate tax system inefficiently imposes a "double tax" on corporate income has led some to consider an integration of the corporate and individual tax systems. The treatment of pass-through income-business income not earned by C corporations-has also received considerable attention in tax reform debates. How the U.S. taxes income earned abroad, and the possibility of moving to a territorial tax system, have emerged as important issues. Both the Obama Administration and the House Committee on Ways and Means Chairman David Camp have released tax reform proposals that would change the current tax treatment of U.S. multinationals.

Several recent papers argue that corporate income taxes should not be used by small, open economies. With capital mobility, the burden of the tax falls on fixed factors (e.g., labor), and the tax system is more efficient if labor is taxed directly. However, corporate taxes not only exist but rates are roughly comparable with the top personal tax rates. Past models also forecast that multinationals should not invest in countries with low corporate tax rates, since the surtax they owe when profits are repatriated puts them at a competitive disadvantage. Yet such foreign direct investment is substantial. We suggest that the resolution of these puzzles may be found in the role of income shifting, both domestic (between the personal and corporate tax bases) and cross-border (through transfer pricing). Countries need cash-flow corporate taxes as a backstop to labor taxes to discourage individuals from converting their labor income into otherwise untaxed corporate income. We explore how these taxes can best be modified to deal as well with cross-border shifting.