A nation with a moderate level of taxation and/or liberal tax incentives for undertaking specific activities such as exporting or investing. Bloomberg Financial Dictionary
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a place where people go to live or to invest money, in order to avoid paying high taxes in their own country:
• Luxembourg and the Cayman Islands are tax havens that don't have strong central bank regulators.
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tax haven UK US noun [C]
► TAX a place where people live or invest money so as to pay less tax than they would in other countries: »
The company is switching its operations to the offshore tax haven of the Dutch Antilles.
Financial and business terms. 2012.