Legal entities

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Without changing country of residence (or, if a U.S. citizen, without giving up one's citizenship), personal taxation may be legally avoided by the creation of a separate legal entity to which one's property is donated. The separate legal entity is often a company, trust, or foundation. These may also be located offshore, such as in the case of many private foundations. Assets are transferred to the new company or trust so that gains may be realized, or income earned, within this legal entity rather than earned by the original owner. If assets are later transferred back to an individual, then capital gains taxes would apply on all profits. Also income tax would still be due on any salary or dividend drawn from the legal entity.
For a settlor (creator of a trust) to avoid tax there may be restrictions on the type, purpose and beneficiaries of the trust. For example, the settlor of the trust may not be allowed to be a trustee or even a beneficiary and may thus lose control of the assets transferred and/or may be unable to benefit from them.

Legal vagueness

Tax results depend on definitions of legal terms which are usually vague. For example, vagueness of the distinction between "business expenses" and "personal expenses" is of much concern for taxpayers and tax authorities. More generally, any term of tax law has a vague penumbra, and is a potential source of tax avoidance.^[16]

Tax shelters

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Tax shelters are investments that allow, and purport to allow, a reduction in one's income tax liability. Although things such as home ownership, pension plans, and Individual Retirement Accounts (IRAs) can be broadly considered "tax shelters", insofar as funds in them are not taxed, provided that they are held within the Individual Retirement Account for the required amount of time, the term "tax shelter" was originally used to describe primarily certain investments made in the form of limited partnerships, some of which were deemed by the U.S. Internal Revenue Service to be abusive.
The Internal Revenue Service and the United States Department of Justice have recently teamed up to crack down on abusive tax shelters. In 2003 the Senate's Permanent Subcommittee on Investigations held hearings about tax shelters which are entitled U.S. tax shelter industry: the role of accountants, lawyers, and financial professionals. Many of these tax shelters were designed and provided by accountants at the large American accounting firms.
Examples of U.S. tax shelters include: Foreign Leveraged Investment Program (FLIP) and Offshore Portfolio Investment Strategy (OPIS). Both were devised by partners at the accounting firm, KPMG. These tax shelters were also known as "basis shifts" or "defective redemptions."
Prior to 1987, passive investors in certain limited partnerships (such as oil exploration or real estate investment ventures) were allowed to use the passive losses (if any) of the partnership (i.e., losses generated by partnership operations in which the investor took no material active part) to offset the investors' income, lowering the amount of income tax that otherwise would be owed by the investor. These partnerships could be structured so that an investor in a high tax bracket could obtain a net economic benefit from partnership-generated passive losses.
In the Tax Reform Act of 1986 the U.S. Congress introduced the limitation (under 26 U.S.C. § 469) on the deduction of passive losses and the use of passive activity tax credits. The 1986 Act also changed the "at risk" loss rules of 26 U.S.C. § 465. Coupled with the hobby loss rules (26 U.S.C. § 183), the changes greatly reduced tax avoidance by taxpayers engaged in activities only to generate deductible losses.

Transfer mispricing

Main article: Transfer mispricing

Fraudulent transfer pricing, sometimes called transfer mispricing, also known as transfer pricing manipulation,^[17] refers to trade between related parties at prices meant to manipulate markets or to deceive tax authorities.
For example, if company A, a food grower in Africa, processes its produce through three subsidiaries: X (in Africa), Y (in a tax haven, usually offshore financial centers) and Z (in the United States). Now, Company X sells its product to Company Y at an artificially low price, resulting in a low profit and a low tax for Company X based in Africa. Company Y then sells the product to Company Z at an artificially high price, almost as high as the retail price at which Company Z would sell the final product in the U.S.. Company Z, as a result, would report a low profit and, therefore, a low tax. About 60% of capital flight from Africa is from improper transfer pricing.^[18] Such capital flight from the developing world is estimated at ten times the size of aid it receives and twice the debt service it pays.^[19][20]
The African Union reports estimates that about 30% of Sub-Saharan Africa's GDP has been moved to tax havens.^[21] Solutions include corporate “country-by-country reporting” where corporations disclose activities in each country and thereby prohibit the use of tax havens where real economic activity occurs.^[18]