Examples from the Web for supertax
What we call the normal income tax is the ordinary tax; what we call the surtax is the supertax.The American Language|Henry L. Mencken
Thank Heaven, she says, hes got somebody thatll be able to keep him when the supertax is put up to twenty shillings in the pound.Press Cuttings|George Bernard Shaw
For situations of this kind a supertax on large estates would seem to hold the promise of a large measure of relief.
The rate of this supertax should increase with the size of the estate above the fixed maximum.
Income-tax and supertax doubled and charged on one-third of the current year's income.The Annual Register 1914|Anonymous