Rachel Reeves should break Labour’s manifesto commitments rather than heaping taxes on businesses to fill her Budget black hole, the Confederation of British Industry said.
Ms Reeves hit firms with an increase in national insurance contributions last year but is set to deliver another tax-raising Budget on November 26.
She could choose to rip up Labour’s manifesto promise not to increase income tax to help balance the books.
CBI chief executive Rain Newton-Smith said: “Sticking rigidly to manifesto commitments may be politically laudable, but it is only economically viable if material conditionsremainunchanged.
“The fact is they are not. Tax rises and spending cuts are unpopular, but the reality is that the Chancellor faces little choice.
“We need to make sure that these measures are fair, broad-based and have a laser-like focus on raising investment, growth and productivity for the long-term.”
In its submission to the Treasury before the Budget, the CBI said higher costs were already holding back business investment, with the share of tax paid by firms at 30.5% – the highest rate for 25 years and set to increase further.
Businesses are now paying £308.6 billion – more than the budgets of the NHS, schools and defence combined, the CBI said as it warned “the Government cannot pull the business tax lever once again to balance the books”.
The group saidthe Chancellor has to be prepared to take unpopular moves in areas like personal tax, public spending, welfare provision and pension increases.
Ms Reeves is expected to use her Budget to increase the amount of “headroom” she has against her self-imposed target of balancing day-to-day spending with receipts in 2029-30.
Doing that on top of filling a gap in her spending plans could require tax hikes amounting to around £26 billion, according to the Resolution Foundation think tank.
Labour was elected on a promise not to increase income tax, employees’ national insurance or VAT but Ms Reeves has refused to recommit to those pledges in the run-up to the Budget.
Ms Newton-Smith said: “The Government deserves huge credit for recognising the challenges faced by the economy and for showing determination to chart a course towards renewal that prioritises both public and private investment.
“But the goal of a growing economy that raises living standards across the board won’t be achieved until real fiscal headroom is created and the cycle of short-term thinking that’s holding the country back is broken.
“Yearlytinkeringto closean ever-increasing fiscal gapsimplyisn’ta viableapproach to a challenge this big.
“We need to take tough decisions now or risk a downward spiral that sees us robbing Peter to pay Paul just to fund normal government expenditure and puts our growth prospects in peril.
“Short-term thinking leads to long-term decline, let’s not make that a political choice we live to regret.”
The CBI put forward a series of suggestions to boost growth, including further planning reforms to speed up critical infrastructure projects and measures to reduce the cost of energy for firms.