[1] The provincial portion of the value-added tax on goods and services in two Canadian jurisdictions, Quebec and Prince Edward Island, was formerly calculated as a surtax on the sticker price plus the federal Goods and Services Tax.
In 1929, the supertax (which had been introduced in the Finance Act 1909 at the rate of 6 old pence in the pound (2.5%) on incomes over £5,000 per year) was renamed to surtax.
Previous examples of a broadly-levied surtax in the United States include one imposed to help finance the Vietnam War during the Lyndon Johnson administration.
It essentially consisted of calculating one's ordinary federal income tax liability and then adding another 10% to it, the amount of the surtax.
A surtax of 4.3 percent was recently proposed by Congress on incomes over $500,000 to alleviate the alterations to the Alternative Minimum Tax code in the United States.[when?]