Finance ministers from the G20 group of leading nations have formally backed plans to tackle international tax avoidance and evasion.
A statement issued earlier supports the automatic exchange of tax information between countries.
It also backs plans by the Organisation for Economic Cooperation and Development to stop firms moving their profits across borders to avoid taxes. The OECD said some firms "abuse" current rules to avoid tax.
UK Chancellor George Osborne said the announcement, which came after a two-day G20 meeting in Moscow, was an "important step towards a global tax system that is fair and fit for purpose for the modern economy".
Last month, the G8 group of leading economies agreed a deal to "fight the scourge of tax evasion", and nations including the UK, France, Germany, the USA and Australia are taking part in a pilot information exchange scheme.