an additional or extra tax on something already taxed.
one of a graded series of additional taxes levied on incomes exceeding a certain amount.
verb (used with object)
to put an additional or extra tax on; charge with a surtax.
a tax, usually highly progressive, levied on the amount by which a person’s income exceeds a specific level
an additional tax on something that has already been taxed
(transitive) to assess for liability to surtax; charge with an extra tax

surtax definition

A tax added to an existing tax. To help finance the Vietnam War, for example, Congress imposed a surtax on the federal income tax.


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