Newly compiled figures show the federal and state governments will give a Scientologist-linked private school in Sydney more than $1 million.

The Athena School in Newtown says on its website that it teaches from the booklet The Way to Happiness, which was written by Scientology founder L Ron Hubbard.

New South Wales Greens MP John Kaye has compiled data sourced from answers given to questions on notice in both federal and state parliaments.

He found that over the next four years, the school will get about $1.4 million of government funding.

"Public money is now being used to support a school that admits to using the discredited Scientology-based teaching methodology," he said.

New South Wales Greens MP John Kaye told Parliament last week that recognising Scientology as a religion granted legitimacy to a cult that bullies, intimidates and exploits.

He says governments should not be funding the Athena School.

"It's time for both the state and federal education ministers to take this seriously," he said.

"The whistle has been blown on Scientology by Senator Xenophon.

"It's time for the state and federal governments to act to make sure that their money is not being used to promote Scientology."