by International taxation is the study or determination of tax on a person or business subject to the tax laws of different countries, or the international aspects of an individual country’s tax laws as the case may be. Governments usually limit the scope of their income taxation in some manner territorially or provide for offsets to taxation relating to extraterritorial income. The manner of limitation generally takes the form of a territorial, residence-based, or exclusionary system. Some governments have attempted to mitigate the differing limitations of each of these three broad systems by enacting a hybrid system with characteristics of two or more.
Many governments tax individuals and/or enterprises on income. Such systems of taxation vary widely, and there are no broad general rules. These variations create the potential for double taxation (where the same income is taxed by different countries) and no taxation (where income is not taxed by any country). Income tax systems may impose tax on local income only or on worldwide income. Generally, where worldwide income is taxed, reductions of tax or foreign credits are provided for taxes paid to other jurisdictions. Limits are almost universally imposed on such credits. Multinational corporations usually employ international tax specialists, a specialty among both lawyers and accountants, to decrease their worldwide tax liabilities.
With any system of taxation, it is possible to shift or recharacterize income in a manner that reduces taxation. Jurisdictions often impose rules relating to shifting income among commonly controlled parties, often referred to as transfer pricing rules. Residency-based systems are subject to taxpayer attempts to defer recognition of income through use of related parties. A few jurisdictions impose rules limiting such deferral (“anti-deferral” regimes). Deferral is also specifically authorized by some governments for particular social purposes or other grounds. Agreements among governments (treaties) often attempt to determine who should be entitled to tax what. Most tax treaties provide for at least a skeleton mechanism for resolution of disputes between the parties.
Systems of taxation vary among governments, making generalization difficult. Specifics are intended as examples, and relate to particular governments and not broadly recognized multinational rules. Taxes may be levied on varying measures of income, including but not limited to net income under local accounting concepts (in many countries this is referred to as ‘profit’), gross receipts, gross margins (sales less costs of sale), or specific categories of receipts less specific categories of reductions. Unless otherwise specified, the term “income” should be read broadly.
Jurisdictions often impose different income-based levies on enterprises than on individuals. Entities are often taxed in a unified manner on all types of income while individuals are taxed in differing manners depending on the nature or source of the income. Many jurisdictions impose tax at both an entity level and at the owner level on one or more types of enterprises. These jurisdictions often rely on the company law of that jurisdiction or other jurisdictions in determining whether an entity’s owners are to be taxed directly on the entity income. However, there are notable exceptions, including U.S. rules characterizing entities independently of legal form.
In order to simplify administration or for other agendas, some governments have imposed “Deemed” income regimes. These regimes tax some class of taxpayers according to tax system applicable to other taxpayers but based on a deemed level of income, as if received by the taxpayer. Disputes can arise regarding what levy is proper. Procedures for dispute resolution vary widely and enforcement issues are far more complicated in the international arena. The ultimate dispute resolution for a taxpayer is to leave the jurisdiction, taking all property that could be seized. For governments, the ultimate resolution may be confiscation of property, incarceration or dissolution of the entity.
Other major conceptual differences can exist between tax systems. These include, but are not limited to, assessment vs. self-assessment means of determining and collecting tax; methods of imposing sanctions for violation; sanctions unique to international aspects of the system; mechanisms for enforcement and collection of tax; and reporting mechanisms.
Taxation systems
Countries that tax income generally use one of two systems: territorial or residence-based. In the territorial system, only local income from a source inside the country is taxed. In the residence-based system, residents of the country are taxed on their worldwide (local and foreign) income, while nonresidents are taxed only on their local income. In addition, a small number of countries also tax the worldwide income of their non-resident citizens in some cases.
Countries with a residence-based system of taxation usually allow deductions or credits for the tax that residents already pay to other countries on their foreign income. Many countries also sign tax treaties with each other to eliminate or reduce double taxation. In the case of corporate income tax, some countries allow an exclusion or deferment of specific items of foreign income from the base of taxation.
Individuals
The following table summarizes the taxation of local and foreign income of individuals, depending on their residence or citizenship in the country. It includes 244 entries: 194 sovereign countries, their 40 inhabited dependent territories (most of which have separate tax systems), and 10 countries with limited recognition. In the table, income includes any type of income received by individuals, such as work or investment income, and yes means that the country taxes at least one of these types.
Source of income
Determining the source of income is of critical importance in a territorial system, as source often determines whether or not the income is taxed. For example, Hong Kong does not tax residents on dividend income received from a non-Hong Kong corporation. Source of income is also important in residency systems that grant credits for taxes of other jurisdictions. Such credit is often limited either by jurisdiction or to the local tax on overall income from other jurisdictions.
Source of income is where the income is considered to arise under the relevant tax system. The manner of determining the source of income is generally dependent on the nature of income. Income from the performance of services (e.g., wages) is generally treated as arising where the services are performed. Financing income (e.g., interest, dividends) is generally treated as arising where the user of the financing resides. Income related to use of tangible property (e.g., rents) is generally treated as arising where the property is situated. Income related to use of intangible property (e.g., royalties) is generally treated as arising where the property is used. Gains on sale of realty are generally treated as arising where the property is situated.
Gains from sale of tangible personal property are sourced differently in different jurisdictions. The U.S. treats such gains in three distinct manners:
a) Gain from sale of purchased inventory is sourced based on where title to the goods passes.
b) Gain from sale of inventory produced by the person (or certain related persons) is sourced 50% based on title passage and 50% based on location of production and certain assets.
c) Other gains are sourced based on the residence of the seller.
In specific cases, the tax system may diverge for different categories of individuals. U.S. citizen and resident alien decedents are subject to estate tax on all of their assets, wherever situated. The non-resident aliens are subject to estate tax only on that part of the gross estate which at the time of death is situated in the U.S. Another significant distinction between U.S. citizens/RAs and NRAs is in the exemptions allowed in computing the tax liability.
Where differing characterizations of an item of income can result in differing tax results, it is necessary to determine the characterization. Some systems have rules for resolving characterization issues, but in many cases, resolution requires judicial intervention. Note that some systems which allow a credit for foreign taxes source income by reference to foreign law.
Income
Some jurisdictions tax net income as determined under financial accounting concepts of that jurisdiction, with few, if any, modifications. Other jurisdictions determine taxable income without regard to income reported in financial statements. Some jurisdictions compute taxable income by reference to financial statement income with specific categories of adjustments, which can be significant.
A jurisdiction relying on financial statement income tends to place reliance on the judgment of local accountants for determinations of income under locally accepted accounting principles. Often such jurisdictions have a requirement that financial statements be audited by registered accountants who must opine thereon. Some jurisdictions extend the audit requirements to include opining on such tax issues as transfer pricing. Jurisdictions not relying on financial statement income must attempt to define principles of income and expense recognition, asset cost recovery, matching, and other concepts within the tax law. These definitional issues can become very complex. Some jurisdictions following this approach also require business taxpayers to provide a reconciliation of financial statement and taxable incomes.
Deductions
Systems that allow a tax deduction of expenses in computing taxable income must provide for rules for allocating such expenses between classes of income. Such classes may be taxable versus non-taxable, or may relate to computations of credits for taxes of other systems (foreign taxes). A system which does not provide such rules is subject to manipulation by potential taxpayers. The manner of allocation of expenses varies, rules provide for allocation of an expense to a class of income if the expense directly relates to such class, and apportionment of an expense related to multiple classes. Specific rules are provided for certain categories of more fungible expenses, such as interest. By their nature, rules for allocation and apportionment of expenses may become complex. They may incorporate cost accounting or branch accounting principles, or may define new principles.
Thin capitalization
Most jurisdictions provide that taxable income may be reduced by amounts expended as interest on loans. By contrast, most do not provide tax relief for distributions to owners. Thus, an enterprise is motivated to finance its subsidiary enterprises through loans rather than capital. Many jurisdictions have adopted “Thin Capitalization” rules to limit such charges. Various approaches include limiting deductibility of interest expense to a portion of cash flow, disallowing interest expense on debt in excess of a certain ratio, and other mechanisms.
Enterprise restructure
The organization or reorganization of portions of a multinational enterprise often gives rise to events that, absent rules to the contrary, may be taxable in a particular system. Most systems contain rules preventing recognition of income or loss from certain types of such events. In the simplest form, contribution of business assets to a subsidiary enterprise may, in certain circumstances, be treated as a nontaxable event. Rules on structuring and restructuring tend to be highly complex.
