Businesses will receive a fortnightly wage subsidy up to $1,500 per employee as part of a Federal Government bid to prevent millions of people from losing their jobs to the coronavirus pandemic.

Key points: The Government expects up to 6 million people will access a $1,500 fortnightly wage subsidy

The Government expects up to 6 million people will access a $1,500 fortnightly wage subsidy The so-called JobKeeper payment is designed to keep people in work

The so-called JobKeeper payment is designed to keep people in work The Government will also lift the means-testing threshold for the partners of JobSeeker recipients

The subsidy is the central plank in a $130 billion economic stimulus package, the third and largest package the Government has announced in response to the coronavirus.

Prime Minister Scott Morrison said he expected 6 million Australians would access a so-called JobKeeper payment for the next six months.

He said there would be a legal obligation on employers to ensure they passed the full wage subsidy onto employees.

The Prime Minister also announced changes to the income test for people on the JobSeeker payment, meaning their partners could earn almost $80,000 a year before they were ineligible for the payment.

The Government last week doubled the JobSeeker payment, previously called Newstart, to $1,100 a fortnight.

The wage subsidy will include not-for-profit employees and New Zealanders who work in Australia but are typically unable to access welfare programs.

Part-time workers and casuals with at least one year in their job can receive the payment, which is slated to start flowing in early May.

It will also be backdated to include anyone who has been stood down due to coronavirus. However, a person can not receive both the JobSeeker and JobKeeper payments.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 3 minutes 47 seconds 3 m 47 s Prime Minister Scott Morrison to spend $130 billion on wages scheme to support jobs during coronavirus pandemic

Treasurer Josh Frydenberg said the JobKeeper scheme would benefit the hardest-hit sectors.

"This $1,500 payment is a flat payment and is the equivalent of around 70 per cent of the median wage and represents about 100 per cent of of the median wage in those sectors most heavily impacted by the coronavirus like retail, like hospitality and tourism," he said.

Employers with an annual turnover of less than $1 billion that have experienced a 30 per cent fall in revenue since March 1 will be eligible for the wage subsidy.

Companies with an annual turnover above $1 billion will have to have a 50 per cent fall in revenue to be eligible for the scheme. Businesses subject to a major bank levy will be ineligible.

Sole traders, self-employed people, partnerships and trusts will also be eligible.

The situation would be more complex for anyone who had already been retrenched, the Prime Minister warned.

"There would be the issue that if they have paid out any entitlements under [their enterprise] arrangement ... that would have to be sorted out, obviously, with the employer," he said.

"For those who continue on with the business, then they will obviously keep all of their entitlements.

"They are not paid out of those entitlements because they are actually still employed by that business."

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 3 minutes 21 seconds 3 m 21 s Treasurer Josh Frydenberg details JobKeeper scheme of $1,500 per fortnight for businesses to pay employees

The Australian Tax Office will oversee the payment and has already created a website for companies to register interest in the JobKeeper program.

More than 8,000 businesses registered with the site within an hour of the Prime Minster and Treasurer announcing the scheme.

The Government ruled out a UK-style subsidy — which involved paying up to 80 per cent of a person's wage — arguing it would be inequitable and difficult to administer within Australia's social security system.

Mr Morrison said the UK program was for people who had been stood down, whereas the Australian program was aimed at preventing people from being in that situation.

"Our wage subsidy scheme for Australia is unlike those announced by other nations," Mr Frydenberg said.

"It's more generous than [the] New Zealand scheme, it is broader than the United Kingdom scheme, as it applies to all employees not just those that have been stood down."

The Parliament, which last Monday passed more than $84 billion in stimulus measures, will be recalled to pass legislation for the JobKeeper payment.

In the meantime, Mr Morrison said he would have weekly meetings with Opposition Leader Anthony Albanese.

Stay up-to-date on the coronavirus outbreak Download the ABC News app and subscribe to our range of news alerts for the latest on how the pandemic is impacting the world