Treasurer Tom Koutsantonis will deliver his first budget for the South Australian Government today, outlining a plan to achieve a surplus of $406 million by 2015-16.

About the SA Budget Labor's budgets since 2002 have been delivered by Kevin Foley, Jack Snelling, Jay Weatherill and now Tom Koutsantonis.

Labor's budgets since 2002 have been delivered by Kevin Foley, Jack Snelling, Jay Weatherill and now Tom Koutsantonis. Media and interest groups lock-ups will be held this Thursday, before Treasurer Tom Koutsantonis gets to his feet in the Parliament to deliver the budget after 3:00pm.

Media and interest groups lock-ups will be held this Thursday, before Treasurer Tom Koutsantonis gets to his feet in the Parliament to deliver the budget after 3:00pm. The Opposition gets its chance to respond formally in the Parliament in the following sitting week.

The Opposition gets its chance to respond formally in the Parliament in the following sitting week. ABC News Online will have budget coverage from 3:00pm, and there will be details too on ABC Radio and ABC TV.

The previous return to surplus pledged by the Government was $230 million but it is not revealing if debt also will rise.

There will be $670 million in the budget to fund the Government's election pledges, but some infrastructure projects are to be delayed.

Hospital and rail upgrades will be in the firing line.

The Gawler rail electrification project already has been promised, cancelled and delayed a number of times and may be pushed back further.

Mr Koutsantonis says his first budget will have two sets of figures, one reflecting the impact of federal budget cuts on South Australia and the other without.

The Government says South Australia's position has been hit by hundreds of million of dollars of federal budget cuts, including for health and education.

Business SA chief executive Nigel McBride is hopeful the Treasurer will hold the line on business taxation.

"We're a small- to medium-sized enterprise state and that sector of our economy is really feeling the pressure, so if we could hold the line on no extra increases in things like payroll tax, land tax, stamp duty, that would be incredibly helpful," he said.

"We are relying on the business community to turn around the economy and to create jobs."

Australian Medical Association SA president Patricia Montanaro says the health system cannot cope with any cuts.

"To maintain the health services in South Australia the health budget needs to continue to increase," she said.

Sorry, this video has expired Project delays likely in SA budget

"If we need to contain costs or change how we do things that needs to be a conversation and that needs involve both those delivering vital services and the community."

Premier Jay Weatherill is promising a responsible spending plan.

"It is a sober document. It sets us up to campaign against the federal cuts but also allows us to make some choices. We have to accept that some of these cuts are going to emerge from the Federal Government. We need to prepare ourselves for that eventuality," he said.