The average UK person will this year have a greater income than their US counterpart for the first time since the 19th Century, figures suggest.
Goods are more expensive in the UK compared with the US
Analyst Oxford Economics said the UK's GDP per head of population will reach £23,500 - £250 higher than in the US.
However, because goods and services are cheaper in the US, Americans will have stronger purchasing power, it added.
UK GDP per capita will also be higher than in Germany (£21,665) and France (£21,700), Oxford Economics calculated.
Managing director Adrian Cooper said: "The last 15 years have seen a dramatic change in the UK's economic performance and its position in the world economy.
"No longer are we the 'sick man of Europe'."
Oxford Economics said that in 1993, following the last major recession and the UK's ejection from the ERM, GDP per capita in the UK was 34% lower than in the US, 33% lower than in Germany and 26% lower than in France.
It said the improved UK position reflected the sustained strong growth it has enjoyed since then and the recent strength of sterling.
Mr Cooper said: "The UK has been catching up steadily with living standards in the US since 2001, so it is a well-established trend rather than simply the result of currency fluctuations."