Tax fraud

Tax evasion is the illegal evasion of taxes by individuals, corporations, and trusts. Tax evasion often entails taxpayers deliberately misrepresenting the true state of their affairs to the tax authorities to reduce their tax liability and includes dishonest tax reporting, such as declaring less income, profits or gains than the amounts actually earned, or overstating deductions.

Tax evasion is an activity commonly associated with the informal economy. One measure of the extent of tax evasion (the "tax gap") is the amount of unreported income, which is the difference between the amount of income that should be reported to the tax authorities and the actual amount reported.

In contrast, tax avoidance is the legal use of tax laws to reduce one's tax burden. Both tax evasion and avoidance can be viewed as forms of tax noncompliance, as they describe a range of activities that intend to subvert a state's tax system, although such classification of tax avoidance is not indisputable, given that avoidance is lawful, within self-creating systems.

In 1968, Nobel laureate economist Gary Becker first theorized the economics of crime, on the basis of which authors M.G. Allingham and A. Sandmo produced, in 1972, an economic model of tax evasion. This model deals with the evasion of income tax, the main source of tax revenue in developed countries. According to the authors, the level of evasion of income tax depends on the detection probability and the level of punishment provided by law.

The literature's theoretical models are elegant in their effort to identify the variables likely to affect non-compliance. Alternative specifications, however, yield conflicting results concerning both the signs and magnitudes of variables believed to affect tax evasion. Empirical work is required to resolve the theoretical ambiguities. Income tax evasion appears to be positively influenced by the tax rate, the unemployment rate, the level of income and dissatisfaction with government. The U.S. Tax Reform Act of 1986 appears to have reduced tax evasion in the United States.

Customs duties are an important source of revenue in developing countries. Importers purport to evade customs duty by (a) under-invoicing and (b) misdeclaration of quantity and product-description. When there is ad valorem import duty, the tax base can be reduced through underinvoicing. Misdeclaration of quantity is more relevant for products with specific duty. Production description is changed to match a H. S. Code commensurate with a lower rate of duty.

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