tax exile
noun
TAX ukus [ C ]
a rich person who lives in a particular country because taxes there are lower than in their own:
Monaco has long been a popular haven for tax exiles.
[ U ]
a situation where a rich person lives in a particular country because taxes there are lower than in their own:
His appointment was only approved after he agreed to give up his tax exile and become resident in France.
go into/live in tax exile The successful entrepreneur declared his commitment to paying millions of euros in tax rather than going into tax exile.
He was named the richest man in Britain in the mid-90s despite his tax exile status.