What is another word for windfall tax?
Pronunciation: [wˈɪndfɔːl tˈaks] (IPA) 
The phrase "windfall tax" refers to a special tax levied on individuals or organizations that suddenly come into significant amounts of unexpected income, usually as a result of events such as winning lottery jackpots, stock market windfalls, or sudden increases in property values. There are various synonyms that can be used to describe this type of tax, including windfall profit tax, sudden wealth tax, unexpected income tax, and unexpected gains tax. Each of these terms highlights the sudden and unexpected nature of the income being taxed, as well as the fact that it is seen as a form of windfall or unexpected bounty that requires special attention from tax authorities.
