Meaning of “supertax” in the English Dictionary

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"supertax" in Business English

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supertaxnoun [ C or U ]

uk /ˈsuːpəˌtæks/ us TAX

a very high rate of income tax or company tax paid by those with a very high level of income or profit:

Introducing a new supertax could help to make up the deficit in the public spending budget.

(Definition of “supertax” from the Cambridge Business English Dictionary © Cambridge University Press)