This post is updated as new information becomes available.
The company reportedly set up a marketing hub in Singapore around 2005 when Rio Tinto Singapore Holdings Pte. Ltd was created. This marketing hub's effective tax rate is est. 5% per annum until 2022 and, Rio Tinto's Australian operations are billed for ore sales by Rio Tinto Singapore in order to transfer cash to this low tax country bypassing a percentage of Australian tax.
BHP Billiton has set up a marketing hub in low tax Singapore.
It refused to answer questions during the Senate inquiry hearing concerning details of this marketing hub.
However, a document titled BHP Billiton Marketing AG Singapore Branch Registration Number: F00006681W Annual Report Year ended 30 June 2014 became publicly available.
This document disclosed that for the period ending 30 June 2014 the company had an effective tax rate in Singapore of 17%.
The company having been granted the status of a Pioneer Service Company (Certificate No. COY-10- IHQ/B340-1/2) by the Singapore Government, the effective tax rate had no effect and therefore BHP Billiton paid no Singapore taxes between 1 July 2005 and 1 July 2015.