The Green Party general election manifesto will call for a "peaceful political revolution" and outline the party's plans to reverse the government's public sector cuts.
The "For the Common Good" policy document will be unveiled in Dolston, east London. The manifesto also focuses on talking climate change, which the Greens described as the "greatest challenge of our time".
"Real action on climate change will create jobs, reduce energy bills and make life better for ordinary people," the party claimed.
The manifesto will be launched by Natalie Bennett, Green leader, and Caroline Lucas, who was elected as MP for Brighton Pavilion in 2010.
"Austerity has failed and we need a peaceful political revolution to get rid of it," Bennett will say.
"Our manifesto is an unashamedly bold plan to create a more equal, more democratic society while healing the planet from the effects of an unstable, unsustainable economy.
"This manifesto presents the Green Party's genuine alternative to our tired, business-as-usual politics. We desperately need a more equal society and the policies we announce today pave the way towards a brighter, fairer future for all."
IBTimes UK obtained a leaked preview of the manifesto in March, which showed that a Green government would introduce a "fearsome" tax offering to increase public spending to up to 46% of GDP.
Brian Heatley, one of the manifesto's authors, explained the manifesto would have a "great deal" on the NHS and the party's campaign literature would focus on the health service.
The former civil servant said the party wants to emphasise "practical things that will affect people" as well as pledging to put another £10bn ($15bn, €13.9bn) "straight into the NHS".
The left-wing party will hope the policy document wins more voters over as they are on 6% in the latest opinion poll from YouGov, down from 8% when compared to mid-February.
The Greens finally unveiled their long-delayed election poster on Monday in Lucas's constituency.
But the event was not without mishaps. Party officials failed to close off a street where a photo-shoot was arranged, allowing vehicles to interrupt proceedings, Business Insider UK reported.