The Cabinet will not simply accept the figures that RTÉ has submitted in a request for interim funding, the Taoiseach has said.
Leo Varadkar added that the Government would ensure that the figures are independently verified.
No additional funds would be provided until the Cabinet has assessed the broadcaster's reform plan which is due in October, he said.
Mr Varadkar's comments come after RTÉ confirmed that it wrote to Minister for Media Catherine Martin again last week seeking €34.5m in interim funding, following a previous request for the same amount submitted in May.
No interim funding has been provided this year.
A briefing note which is being considered by the Cabinet reveals that the national broadcaster believes that it could lose €21m in TV licence fee revenue by the end of 2023, with renewals down a third.
Minister Martin said that the Government needed to see reform before any funding could be allocated.
Funding decision this year - Varadkar
RTÉ received €15m in interim funding last year following a recommendation by the Future of Media Commission.
A spokesperson for the broadcaster said that talks with Minister Martin are "ongoing" in an effort to secure further funding.
On long-term funding, Mr Varadkar said that the Government would take decisions this year on a replacement for the licence fee, legislate for it next year and have the system in place by 2025.
In a statement today, RTÉ insisted that it remains "focused on delivering a range of important changes to the operation and culture of the organisation as part of the essential work to restore trust in RTÉ."
RTÉ executives are due to attend a meeting of the Oireachtas Committee on Media next week to answer questions about the ongoing difficulties at the station.
Controversy and 'turbulence'
These latest developments come as RTÉ published its 2022 annual report.
Board Chair Súin Ní Raghallaigh said that the report "was finalised before the crises and turbulence of recent times and before the announcement of a series of organisational changes and reforms in RTÉ".
However, she said that the report sets out "the significant and ongoing contribution of RTÉ staff and the Independent Production sector in producing diverse, quality programming for television, digital and radio platforms".
"As an organisation we cannot shy away from the shortcomings and challenges that have been identified," she added. "Nor will we."
RTÉ has been engulfed in controversy since it admitted that it had underdeclared the earnings of its highest earner, Ryan Tubridy, by €345,000 from 2017 to 2022.
Last month, a report by Grant Thornton found that a plausible explanation for the under-declaration of Mr Tubridy's earnings in 2017, 2018 and 2019 by €120,000 was RTÉ's intention to keep the star's declared annual earnings below €500,000.
Two days after the publication of the Grant Thornton report, Mr Bakhurst revealed that Ryan Tubridy would not return to his presenting role in RTÉ.
