"Business as usual for both the Knights and the Jets": HSG

MILLIONS in unpaid tax bills cloud the future of embattled mining magnate Nathan Tinkler's sporting clubs, the Newcastle Knights and Jets, according to documents filed in Sydney's Federal Court this week.

Australian Tax Office records have revealed parent company the Hunter Sports Group owes $184,000, the Jets $1.063 million and the Knights $1.424 million.

The company is already being sued by the NSW Government over an alleged $60,000 in unpaid stadium rent.

Two of Mr Tinkler's companies, Mulsanne Resources and Patinack Farm Administration, are in liquidation.

His stake in Whitehaven Coal is believed to have created a $700 million black hole.

A directions hearing for the ATO vs HSG proceedings has been set down for February.

A spokesperson for the HSG said on Wednesday the company was surprised by the move of the ATO and had only been alerted to court action through the media.

"We advise that any outstanding sum will be paid as soon as possible - well before the reported hearing date on the matter next February," the spokesperson said

"It is business as usual for both the Knights and the Jets. There will be no further comment."