Current deputy premier Jeremy Rockliff has already confirmed he will nominate to be premier to replace Peter Gutwein, and Liberal sources have confirmed Mr Rockliff will be the only nominee.

Mr Ferguson said he has had "positive conversations" with Mr Rockliff and the Parliamentary Liberal Party, resulting in his decision to nominate to be deputy premier.

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He also said it was "time" for Mr Rockliff to be the party's leader - further confirming the identity of Tasmania's 47th premier.

"A deputy with that same energy and loyalty is precisely what Jeremy will require. He, together with all our incredible team, will be able to depend on me as a unifying and supportive person and experienced hand," Mr Ferguson said.

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"Jeremy and I have prudently worked through our plans this week, we are focused on the everyday needs of Tasmanians and we have a plan for the government's continued success based on the very sound foundations we have laid since 2014."

He described Ms Archer as his "friend and colleague" and that he welcomes her nomination for deputy premier. Both are considered to be from the conservative side of the party, whereas Mr Rockliff is considered a moderate, like Mr Gutwein.

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There were unlikely to be any further nominations.

Ms Archer had earlier stated she wanted to provide a gender and geographic balance for Mr Rockliff.

The decision of the partyroom will be announced on Friday, when Mr Gutwein officially resigns as premier and member for Bass, allowing for a recount to occur in two weeks.

A backbencher will need to be elevated to cabinet, and the portfolios of treasurer, tourism and climate change to be decided upon.

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