A defamation court case taken against a notorious vegan activist has exposed the enormous amount of money she earns from OnlyFans.

Tash Peterson is making so much money posting semi-clad photos of herself that she is among its top 4 per cent of earners on the platform, WA's Supreme Court has heard.

The court was told Ms Peterson earned more than $400,000 in the 2021-2022 financial year, but declared just $70,000 in business earnings to Australian Tax Office.

When her bank statements were mentioned in court, she could only point to one $100 donation to an animal charity, the West Australian reported.

Ms Peterson, her boyfriend Jack Higgs and her company V-Gan Booty are being sued by the owners of Bicton Veterinary Clinic over a video they put on social media in September 2021, accusing the clinic of promoting 'animal slavery'.

A court case taken against notorious vegan activist Tash Peterson (pictured) has exposed the enormous amount of money she earns from OnlyFans and how little she seems to give to animal rights causes

A court case taken against notorious vegan activist Tash Peterson (pictured) has exposed the enormous amount of money she earns from OnlyFans and how little she seems to give to animal rights causes

Ms Peterson (pictured) is making so much money posting semi-clad photos of herself to OnlyFans that she is among its top 4 per cent of earners, WA's Supreme Court has heard

Ms Peterson (pictured) is making so much money posting semi-clad photos of herself to OnlyFans that she is among its top 4 per cent of earners, WA's Supreme Court has heard

Dr Kay McIntosh and her husband Andrew claim the video damaged their reputation and that Ms Peterson and Mr Higgs created it to get publicity and make money.

They claim Ms Peterson used her vegan stunts to get people to sign up to her OnlyFans account and pay her for access to her risque photos.

The video, which is still on Ms Peterson's social media account, also accused Dr McIntosh of being an 'animal abuser' who 'eats her own patients'.

Chief Justice Peter Quinlan said he had  discovered another exhibit existed that showed V-Gan Booty had submitted a tax return for 2021-2022 of $267,000.

The court heard that tax return was created by Ms Peterson's accountant.

Martin Bennett, the McIntoshs' lawyer, said that figure still left around $130,000 'missing' from that financial year.

V-Gan Booty was set up in December 2021 on the advice of Ms Peterson's accountant, due to the money she was making from her OnlyFans account, which had been set up about seven months earlier.

Mr Bennett suggested the increase in subscribers coincided with high profile stunts Ms Peterson carried out, including at luxury stores, Gucci and Louis Vuitton.

The court was told Ms Peterson (pictured) earned more than $400,000 in the 2021-2022 financial year, but declared just $70,000 in business earnings to Australian Tax Office - though this figure was later disputed

The court was told Ms Peterson (pictured) earned more than $400,000 in the 2021-2022 financial year, but declared just $70,000 in business earnings to Australian Tax Office - though this figure was later disputed

Ms Peterson, disagreed, saying the sharp rise in subscriptions came after a video about her OnlyFans account was posted to YouTube.

Though the activist was only able to point to one definite donation to an animal rights charity on her bank statement, she said she also used a PayPal account to make donations.

Some of the payments on her bank statement included receipts for buying a new car, a holiday in Italy, transfer of money to her boyfriend and a 'jet ski loan' to her father and brother, the court heard.

The case continues in the WA Supreme Court.