Britain’s cut in top-rate tax this year “bucked the trend” as equivalent average rates around the globe rose.
A study by accountants KPMG International found the reduction, from 50pc to 45pc in April, was the largest anywhere in the world in 2013.
The UK’s top rate of tax, as a result, has fallen from being fifth to 11th highest in the European Union. It is 18th highest in the world.
The report said growing concerns about deficits in government budgets had increased pressure for tax rises, with the global average income tax rate increasing again this year by 0.3 percentage points – the second year in a row.
Marc Burrows, head of international executive services at KPMG in the UK, said: “Dropping the UK’s top rate from 50pc to 45pc enhanced Britains attractiveness to internationally mobile executives, as did a number of recent corporate tax reforms and rate cuts.