SYDNEY, AUSTRALIA - NOVEMBER 19: Lucas Neill of the Socceroos calls instructions during the international friendly match between the Australian Socceroos and Costa Rica at Allianz Stadium on November 19, 2013 in Sydney, Australia. (Photo by Mark Kolbe/Getty Images)

Former Socceroos captain Lucas Neill has declared bankruptcy in the UK.

Neill, who captained Australia a record 61 times, and made 96 appearances for the national side, was declared bankrupt on January 6.

The 28-year-old, who played for Blackburn, West Ham, Everton and Watford during a 15 year career in England, before brief stints in Turkey, the Middle East and at Sydney FC, is estimated to have earned between $35 to $40 million during his career.

He has investments in America and a coaching business in Sydney.

“Mr Neill is due to be interviewed when he returns to the UK in the coming weeks, at which point the Trustees will be able to obtain the background information required to determine the full scale of Mr Neill’s debts," National Head of Creditor Services at Begbies Traynor in London Dale Hernon said.

“At this early stage of proceedings, it is currently unclear to what extent any funds will be recovered.”