The claim is unproven. Labor is yet to confirm if it will remove a provision that allows states to include non-SRS spending as part of its SRS commitment. 

At present, this can be up to four per cent of the total SRS figure - potentially leaving schools only 96 per cent funded.

Several Labor figures have made the claim following federal Education Minister Jason Clare announcing the agreement alongside WA counterpart Tony Buti at a press conference in Perth on January 31.

In an ABC TV interview, Mr Clare stated the agreement would get WA public schools “to that full funding level that David Gonski talked about all those years ago”.

Federal Labor MP for Perth Patrick Gorman repeated the claim in a post on X (formerly Twitter).

"I am proud that WA is the first state to sign with the Federal Government to provide 100% of the Schooling Resource Standard,” he wrote.

The "agreement" is currently a "statement of intent" with both parties saying the finer details are yet to be decided. 

AAP FactCheck asked Mr Clare if the four per cent provision would be removed.

His office did not directly answer and instead pointed to a response Mr Buti gave to a reporter's question at the January 31 press conference.

“I suppose you’re talking about this four per cent,” Mr Buti said. “That has been always considered as part of the funding agreement. Every other state does it. That four per cent goes to ensuring that we have a quality education."

The SRS is an estimate of how much public funding a school needs to meet its students' educational needs. 

Each school's total is made up of a base amount per pupil and then the possible addition of several needs-based loadings, taking into account factors like English language proficiency, socio-educational disadvantage and location.

Under the current agreement, the federal government funding for public schools is capped at 20 per cent of the SRS, with states contributing up to 75 per cent, leaving a shortfall of five per cent.

Under the new model, WA's contribution would lift to 77.5 per cent and the federal contribution would rise to 22.5 per cent by the end of 2026.

However, under the existing agreement, states can include in their contribution non-SRS costs such as capital depreciation and regulatory fees.

This can amount to up to four per cent of the total SRS funding. 

Experts told AAP FactCheck this means funding only reaches 96 per cent of the SRS level if states take advantage of the full four per cent provision.

Nine Newspapers reported last month that the provision meant $2 billion supposedly spent by state and territories in 2023 never reached the classroom.

Matthew Sinclair, an educational policy researcher at Curtin University, said the details were still being negotiated ahead of the agreement coming into force next year.

He added: "In summary, unless this clause is removed in the next set of bilateral funding agreements, then the claim that in practice schools can be funded at 96 per cent of the SRS, assuming the states and territories utilise this loophole, rather than 100 per cent, will prove to be correct."

Stephen Lamb, an emeritus professor at the Centre for International Research on Education Systems (CIRES), agreed.

"If the previous rules and inclusions are retained this will mean that there is at least four per cent of funding for public schools that is unavailable to be spent on public schools and learning in public schools, relative to private schools," Professor Lamb said.

He said the 100 per cent claim would only be true in a "technical sense" and that in reality schools would be 96 per cent funded.