Business leaders expressed frustration with ministers on Monday amid a growing budget backlash that bosses said would trigger an "avalanche of costs" and leave them with no choice but to slash investment and increase prices.
Sky News has learnt that bosses of large retail and hospitality companies and trade associations told Jonathan Reynolds, the business secretary, that last week's budget risked damaging consumer confidence and exacerbating challenges facing the UK economy.
Among the dozens of companies represented on the call are said to have been Burger King UK, Fuller Smith & Turner, Greene King, Kingfisher and the supermarket chain Morrisons.
Mr Reynolds is said to have acknowledged that Rachel Reeves's inaugural fiscal statement had "asked a lot" of British business, with James Murray, the financial secretary to the Treasury, understood to have described it as "a once-in-a-generation budget", according to several people briefed on the call.
One insider said that Nick Mackenzie, the chief executive of Greene King, had highlighted that the increase in employers' national insurance (NI) contributions would cause "a £20m shock" to the company, while Fullers is understood to have warned that it would be forced to halve annual investment from £60m to £30m as a result of increased cost pressures.
Rami Baitieh, the Morrisons chief executive, told Mr Reynolds that the budget had exacerbated "an avalanche of costs" for businesses next year, and asked what the government could do to mitigate them.
Sources added that the CBI, the employers' group, said its impact would be "severe", while the British Beer & Pub Association added that there was now a disincentive to invest and flagged "a tsunami" of higher costs.
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The range of comments on the call with ministers underlines the scale of discontent in the private sector about Labour's first budget for nearly 15 years.
Only a small number of interventions during the discussion are said to have been in support of measures announced last week, with the Federation of Small Businesses understood to have praised the doubling of the employment allowance, which would see many of the smallest employers having their NI bills cut by £2,000.
The Department for Business and Trade has been contacted for comment, while none of the companies contacted by Sky News would comment.