FINALLY: Scott Morrison To Call The Federal Election

It is expected Scott Morrison will finally call the federal election, likely to be held on May 18.

10 News First political editor Peter van Onselen confirmed Morrison was on his way from Melbourne to "call the election tomorrow".

At 10pm, the PM's plane left Melbourne to return to the nation's capital.

The trip was reportedly intended to be a secret so as to avoid media tracking the journey from The Lodge to Yarralumla, where Morrison will meet with Sir Peter Cosgrove. That did not work out, although at the time of publishing, the PM's Office had yet to officially comment.

Morrison appeared to launch into official campaign mode on Wednesday night, asking his voters to think long-term in a new video posted to social media.

“The next 10 years is going to determine people’s lives, the next 10 years are important to everybody at every stage of life,” he said in the video, appearing alongside his family.

“If we create the right conditions then Australians will have a better next decade. The decisions you make in one term of government last for a decade or more, so it is not just about the next three years, it is about what the next decade looks like.”

Van Onselen said if Morrison is to call the election on Thursday, it will have to be in the morning due to a full schedule of meetings for the Governor-General from 10am.

Australian voters are expected to head to the polls on May 18 -- the latest possible date for a half-Senate election.

In the lead up to last weekend, it looked all but certain a May 11 election would be happening, with the PM expected to make the call by Sunday.

But as the weekend came and went, the Government came under scrutiny for appearing to squeeze every last opportunity to spruik the Budget.

READ MORE: Why ScoMo Is Calling This Election In SloMo

Opposition Leader Bill Shorten accused Morrison of deliberately not setting a date in order to continue the Government's use of taxpayer funds to pay for its own advertising.

"This government wants to spend tens of millions of dollars on TV advertising to pump up their own tyres," Shorten said.

"That's why they're buying time."

Labor claimed the advertising bill could be up to $1 million per day.