Meaning of ISA in English

( in full individual savings account )

a type of savings account introduced in Britain in 1999 which allows someone to save money each year up to an amount set by the government without paying tax on the interest earned. Most banks and building societies offer ISAs.

Oxford guide to British and American culture English vocabulary.      Руководство по британской и американской культуре, Оксфордский английский словарь.