The Organisation for Economic Co-operation and Development (OECD) identifies three key factors in considering whether a jurisdiction is a tax haven:[12]
Nil or only nominal taxes. Tax havens impose nil or only nominal taxes (generally or in special circumstances) and offer themselves, or are perceived to offer themselves, as a place to be used by non-residents to escape high taxes in their country of residence.
Protection of personal financial information. Tax havens typically have laws or administrative practices under which businesses and individuals can benefit from strict rules and other protections against scrutiny by foreign tax authorities. This prevents the transmittance of information about taxpayers who are benefiting from the low tax jurisdiction.
Lack of transparency. A lack of transparency in the operation of the legislative, legal or administrative provisions is another factor used to identify tax havens. The OECD is concerned that laws should be applied openly and consistently, and that information needed by foreign tax authorities to determine a taxpayer’s situation is available. Lack of transparency in one country can make it difficult, if not impossible, for other tax authorities to apply their laws effectively. ‘Secret rulings’, negotiated tax rates, or other practices that fail to apply the law openly and consistently are examples of a lack of transparency. Limited regulatory supervision or a government’s lack of legal access to financial records are contributing factors.