Former Wallabies player Israel Folau has said he is set to lose $14 million as a result of being sacked by Rugby Australia (RA), according to new court documents.

Key points: Court documents have revealed Israel Folau has increased the damages figure from a previous estimate of $10 million

Court documents have revealed Israel Folau has increased the damages figure from a previous estimate of $10 million Folau claims he could have been a future Wallabies captain and the national team would have produced a "superior" performance at the Rugby World Cup had he not been sacked

Folau claims he could have been a future Wallabies captain and the national team would have produced a "superior" performance at the Rugby World Cup had he not been sacked The document includes claims Rugby Australia was told the sacking of Folau could offend Polynesian players and divide the team

The documents also claim the Wallabies would have put in a "superior performance" if Folau had been selected for the 2019 Rugby World Cup in Japan and he could have possibly captained "a trophy-winning Wallabies team" in the future.

An amended statement of claim from Folau, released on Wednesday, shows the damages figure has been increased to $14 million from a previous estimate of $10 million.

Folau's contract was terminated in May. He has claimed he was wrongfully dismissed by RA and Rugby NSW after a controversial Instagram post in April condemning "drunks" and "homosexuals", and warning that "hell awaits" them.

The devout Christian also previously claimed transgender people were evil and should repent.

In the amended statement of claim to the Federal Circuit Court, Folau detailed the income he claimed he had lost since RA tore up his contract.

The list included estimates of between $450,000 and $1.25 million a year in "post-playing career monetary benefits" over a span of 15 to 25 years.

Folau claimed he could have one day skippered a successful Wallabies team. ( AAP: Dan Himbrechts )

It detailed Folau's belief that he could have earned more if he was selected as Wallabies Test captain in the future.

"Additional post-playing career monetary benefits to be derived from building upon [his] record of achievement … and two additional Rugby World Cups," the claim stated.

"Including a superior performance at the 2019 Rugby World Cup by the Wallabies than what was achieved without Folau, and possible captainship of a trophy-winning Wallabies team."

The claim stated Folau lost about $300,000 in guaranteed sponsorship, $300,000 in Test match payments and $4.2 million in base salary.

Folau, a former rugby league and AFL player, would have "continued to play successfully" for the Wallabies and New South Wales Waratahs until his retirement, the claim stated.

The documents included fresh claims that RA was told by a senior Wallabies squad member that sacking Folau could offend Polynesian players and divide the team.

"Before the hearing was conducted before the tribunal, a senior player had told Ms (RA chief executive Raelene) Castle and Mr (Wallabies coach Michael) Cheika that the termination of Mr Folau was likely to cause division amongst the Wallabies and that Christian Polynesians in the team were offended by the actions of Rugby Australia," the claim stated.

The document stated RA was told Folau's sacking might offend Polynesian players in the Wallabies squad. ( AAP: Darren England )

At least 15 teammates and coaching staff members had backed Folau following his comments, according to the documents.

Folau conceded his social media posts were a "low-level breach", the claim stated.

To save his contract he offered to apologise, pay a fine, serve a suspension, donate to Randwick Children's Hospital and let RA review his future social media posts.

RA said Folau's expressions of faith had always been supported "provided that these were done in a respectful and inclusive manner".

AAP