David Cameron will call for greater international cooperation on tax evasion in a speech to the World Economic Forum at Davos.
The Prime Minister will urge leaders to work together and tackle tax evasion by multi-national companies and the super-rich.
Mr Cameron will make the issue a key focus during Britain's presidency of the G8 leading economic powers.
A Downing Street spokesman said he would not be talking about Europe in the wake of his landmark promise of a referendum.
More top news
A train carrying what looks like coal has travelled from North Korea into China, if this is the case it would be breaching an embargo.
A confidential document seen by ITV News reveals the details of a deal between F1 and its regulator which could amount to bribery.
Three "suspicious mail packages" containing a "white powder" have been sent to political offices in Scotland, the Scottish Parliament says.