Major IT firms such as Amazon, Facebook and Google earn huge profits through cross-border data and service transactions. But critics say they don't pay enough taxes in countries where they have no physical presence.

The proposals say if a company is deemed to be taxable in a country, then a formula would be needed to determine the portion of the firm's global profits that the country could tax. The OECD says the rules' fine points will be decided later.

The proposals will be reported to a meeting of Group of 20 finance ministers and central bank chiefs in Washington next week.
A framework that involves about 130 countries and regions will also discuss the measures.