[ noun sur-taks; verb sur-taks, sur-taks ]
/ noun ˈsɜrˌtæks; verb ˈsɜrˌtæks, sɜrˈtæks /


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.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?

Origin of surtax

1880–85; sur-1 + tax; cf. supertax, French surtaxe Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for surtax

British Dictionary definitions for surtax

/ (ˈsɜːˌtæks) /


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


(tr) to assess for liability to surtax; charge with an extra tax
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for surtax


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

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.