Failure to pass next year's Senedd commission budget could result in unthinkable cuts, even putting politicians' £80,000-a-year salaries at risk, the presiding officer has warned.
Elin Jones, the ;Llywydd', said not passing the commission's 2026/27 budget would make the running of the Welsh Parliament "almost impossible".
Ms Jones appeared before the finance committee for scrutiny after unveiling the £102m draft budget, which includes a 21% increase to support an expanded 96-member Senedd.
Wishing the commission "good luck", Mike Hedges asked about the impact of a failed Welsh Government budget which would see wider funding cuts across public services in Wales.
Ms Jones said: "If the Senedd budget is not passed then it will be 95% of the current year's budget. Of course, 95% of a usual current year's budget is difficult but possibly manageable."
"In this situation...where it would be 95% of this current year's budget [£84m] to fund next year's budget [£102m] which has 96 members and a 21% increase.. then that is...a very tough ask – well, [an] almost impossible ask for the running of this Senedd."
'Over budget'
She said the commission had not fully explored the "considerable" cuts required because the scenario was "so difficult", but warned it would affect the numbers of commission staff.
Ms Jones added: "And, dare I suggest, the payment of salaries of Senedd members ourselves or whoever they be who are returned."
Labour's Mr Hedges also asked about the latest £4.22m estimate of the costs of refurbishing the debating chamber, or Siambr, which was up nearly 30% on earlier estimates.
Ms Jones – who chairs the Senedd commission, which is responsible for the estate and support services – replied: "It is more than what was budgeted for in this financial year."
Explaining the increase, Ms Jones told the committee that earlier estimates were made before the official tendering process and additional work, such as replacing cabling, has since been added to the project's scope.
The Llywydd said: "We've foreseen the work that would have been needed to have been done in three or four years' time and done it now... to lessen the impact on the public purse."
'Bay 32'
Sam Rowlands, the Conservatives' shadow finance secretary, expressed concerns about a 30% staffing increase in the Senedd while wider front-line public services face challenges.
Ms Jones responded: "What we are asked to do as a commission is to meet the needs of the Senedd. At different times, the Senedd increases its ask of the commission."
Manon Antoniazzi, chief executive and clerk, said the increase is largely linked to reforms which will see 36 more politicians returned to Cardiff Bay at the next election in May
Under the draft budget, £3.1m has been earmarked for the 'Bay 32' project, which is looking at future office accommodation options – with the lease on Tŷ Hywel expiring in 2032.
Options thought to be on the table include building new offices, extending the lease, buying Tŷ Hywel – the redbrick building behind the Senedd – or taking up a nearby property.
Ms Jones confirmed the final decision on 'Bay 32' will be taken by the next Senedd commission after she stands down as Llywydd next May.
'Deeply missed'
Wednesday's meeting opened with a tribute to Hefin David, the Caerphilly MS and finance commissioner who died suddenly in August.
Peredur Owen Griffiths, who chairs the finance committee, said: "Hefin is deeply missed and his absence is felt particularly here today," expressing heartfelt condolences to Dr David's family, friends and colleagues."
Ms Jones has taken responsibility for the budget and Lesley Griffiths, the ex-Labour minister who represents Wrexham, was expected to become a Senedd commissioner on Wednesday.
The Llywydd said: "It's difficult to believe that I am here before you...the final conversation I had with Hefin was during the summer and it was on the very budget that we're discussing today."
"It was clear to me that Hefin David had...brought great gravity and seriousness to his work as commissioner over recent years."

Three CoastSnap stations set to be installed along the Glamorgan Heritage Coast
Daffodil Runner statue installed at Marie Curie Hospice in Penarth
Woman Dies After Incident in Leckwith as Police Investigation Continues
Vale entrepreneur wins national Innovate UK award for sustainable construction technology
Cardiff Airport retains top accessibility rating as regulator reports record demand for assistance
Open Doors event to showcase hidden world of Glamorgan Archives
New details have emerged of a new tree-lined public square that will replace a traffic dominated junction
Dyffryn Gardens’ Edwardian rose garden blooms again after decade-long restoration
Barry’s Own Daniel White to Walk 190 Miles Back to Where His Round Table Story Began
1,300 people attend Flying Start Family Fun Day
Dispersal order put in place to tackle anti-social behaviour
Interim Chief Executive Appointed at Cardiff and Vale University Health Board
Cardiff Theatre Marks 50 Years of Service for Long‑Standing Staff Member
Council to review use of GP letters as evidence for disability claims
Plans have been put in place to redevelop a complex with more than 20 flats
Vale Council Reaccredited Under White Ribbon Scheme as Part of Ongoing Work to Tackle Violence Against Women and Girls
Two Vale Restaurants Among Those Set to Close as Whitbread Shuts Brewers Fayre and Beefeater Chains
Vale Council Issues Safety Warning After Gas Canisters Found in Household Recycling
Cogan Primary School Praised for its Inclusive Culture and Strong Leadership in Estyn Inspection