The hefty pay and staffing cut Nats face after blowing up Coalition

Ms Ley will hand all 30 opposition shadow ministerial positions to members of her own Liberal Party, including eight that had previously been expected to go to Nationals MPs and senators - and, with them, the higher salaries attached to the roles.

Those who would have nabbed a spot on the opposition frontbench will miss out on $46,732 to $58,514 a year in salary loadings paid to shadow ministers, which will now go to Liberal MPs and Senators appointed to Ms Ley's front bench.

They will also have to make do with fewer staff.

Nationals leader David Littleproud on Wednesday said the decision to split from the Liberals had been made knowing the party would suffer a loss of resources.

"There's people that are going to get a pay cut out of this," Mr Littleproud told ABC radio, saying he was acting to "preserve and protect" policies to give people living in regional Australia "their fair share".

He announced at press conference on Tuesday that the Nationals had taken a "principled decision" not to sign a post-election federal Coalition agreement with the Liberal Party, after Ms Ley refused to guarantee support for policies including nuclear energy.

"We're going to build on those policy directions that we took to the last election that were very popular in regional Australia," Mr Littleproud said.

"We're going to go and listen, understand and say to regional Australia: 'What else should we be doing for you in standing up for you here in Canberra?"

Mr Littleproud will appoint the Nationals party's own spokespeople to form policies and speak on issues, but they will not be entitled to additional pay or staff.

As the official Opposition, the Liberal Party is entitled to 21 per cent of the Albanese government's staffing levels, a convention designed to allow proper scrutiny of the ministry.

Prime Minister Anthony Albanese determines the allocation of personal staff positions to Opposition Leader Sussan Ley, who then allocates them to shadow ministers.

The opposition leader is understood to have taken the position that the staffing allocation provided to the shadow ministry is not relevant to the Nationals and that diluting or reducing the resources available to her frontbench would undermine the capacity of the Opposition.

Opposition MPs and senators are paid a loading of 20 to 25 per cent of their base salaries - which are currently $233,660 - under the Parliamentary Business Resources Act 2017.

Ms Ley told ABC 7.30 on Tuesday the Coalition agreement should not be "hostage to individual policies" and that she had told Mr Littleproud the two parties should "allocation shadow ministries according to the usual formula" and formulate policies at a party level before coming together "in the normal way".

She said that, in her negotiations with Mr Littleproud, she had not been confident that shadow cabinet solidarity - meaning that all members of the Coalition could be counted on to vote together in the Parliament - would be maintained.

"We can't have a situation where members of the shadow cabinet sit on different sides of the Parliament in different votes," Ms Ley said.

Nationals deputy leader Kevin Hogan told reporters in Canberra on Tuesday that the financial impact of the Coalition split "wasn't even a focus of the discussion for us because of the principle decisions that we have to make about this decision."

"A lot of our members of our party room are going to lose positions and titles out of this, and money," Mr Hogan said.

In the last term of Parliament, the Nationals held nine frontbench positions: seven in then opposition leader Peter Dutton's shadow cabinet and two in the outer shadow ministry.

After Liberal National Party senator Jacinta Nampijinpa Price defected to sit with the Liberals following the election, the Nationals had been expected to receive eight opposition frontbench positions overall.

Mr Littleproud was the opposition agriculture spokesperson before the election, while Mr Hogan was trade and tourism spokesperson and the party's Senate leader Bridget McKenzie was infrastructure, transport and regional development spokesperson.

The other portfolios held by Nationals MPs and Senators in the 47^th Parliament were: