Rishi Sunak and Chancellor Jeremy Hunt are said to be looking at spending cuts and tax rises of £50million ahead of next month's Autumn statement.
At a meeting on Thursday, they were warned economic growth is forecast to drop amid fears of a recession.
Treasury sources have not put a figure on the savings being considered in the November 17 budget but they were believed to be looking for financial headroom of up to £10 billion.
Along with the “massive fiscal black hole” forecast of being up to £40 billion, the Prime Minister and the Chancellor were thought to be targeting up to £50 billion of cuts and hikes to fill the gap.
Calm markets
A Treasury source told PA: “Markets have calmed somewhat, but the picture remains grim. After borrowing and spending hundreds of billions of pounds due to Covid-19 and for energy bills support, there is a massive fiscal black hole to fill.
“People should not underestimate the scale of this challenge, or how tough the decisions will have to be. We’ve seen what happens when governments ignore this reality.”
The figures are not expected to be finalised until Mr Sunak and Mr Hunt receive the latest forecasts from the Office for Budget Responsibility.
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The pair delayed the financial statement by more than two weeks from Halloween on Monday as public finances appeared in a worse shape after Liz Truss’s leadership.
Mr Hunt has sought the advice of George Osborne as he sounds out Conservative predecessors over his upcoming autumn budget.
Austerity
A Treasury source said Mr Hunt met Mr Osborne, the architect of austerity in the wake of the 2008 financial crisis, in Downing Street on Thursday.
Talks were also said to have been arranged with Kwasi Kwarteng, Mr Hunt’s predecessor whose mini-budget sparked the financial turmoil that forced Ms Truss from office.
Sajid Javid and Lord Hammond were also expected to be consulted.
Spending cuts
Mr Sunak and Mr Hunt have refused to commit to the triple-lock on pensions, meaning millions could face real-terms cuts in April, as inflation soars past 10%.
The pledge of defence spending increasing to 3% of GDP by 2030 was also under review.
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Mr Sunak was also not committing to Boris Johnson’s promise to raise benefits in line with inflation.
The Chancellor has pledged to get “debt falling over the medium term” and has warned of “very, very difficult decisions” being required on tax and spending.
The Institute for Fiscal Studies has warned that many departments’ spending budgets are still far below their 2010 levels in real terms, in some cases more than 25% lower, making further savings hard to come by.
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