Treasury report says Brexit would cost British families £4,300 a year

Document assesses three scenarios and claims economy would shrink by 6%

Leaving the E

U would cause Britain’s economy to shrink and tax receipts to plummet, and cost the average household thousands of pounds a year, an official analysis from the UK treasury has warned.

The 200-page document assesses the economic impact of three post-Brexit scenarios, concluding that the economy would be likely to be 6 per cent smaller by 2030, the equivalent of £4,300 (€5,400) a year for each household.

"Under any alternative, we'd trade less, do less business and receive less investment, and the price would be paid by British families. Wages would be lower and prices would be higher," chancellor of the exchequer George Osborne said.

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“The most likely result is that Britain would be poorer by £4,300 per household. That is £4,300 worse off every year, a bill paid year after year by the working people of Britain.”

Leave campaigners dismissed the figures as deeply flawed, questioning the validity of dividing the projected fall in GDP by the UK’s current 27 million households, to produce an average annual loss of £4,300.

EU regulation

Vote Leave’s chief executive

Matthew Elliott

said the number of households was projected to increase by more than four million by 2030, adding that the document ignored a 2005 treasury report estimating that EU regulation could cost British consumers the equivalent of 7 per cent of GDP.

"It is not credible to make these claims without showing your workings or the alternative you are comparing it to. It also ignores the treasury's own analysis that EU regulation costs the UK economy much more – a staggering £125 billion a year. As the prime minister himself said, we are the fifth biggest economy in the world, and outside of the EU we won't stop trading with Europe, " he said.

Regulate trade

The report looked at three options for a post-Brexit trading relationship with the EU: membership of the European Economic Area, like

Norway

; a bilateral trade deal with the EU, like

Canada

; and relying on

World Trade Organisation

rules to regulate trade. It said the Norway option, which offers access to the EU single market but requires adoption of EU rules and free movement of people, would see the UK economy shrink by 3.8 per cent by 2030, with annual lost tax revenue of £20 billion and an average cost per household of £2,600 per year. The second option, a bilateral free trade agreement with the EU similar to one recently secured by Canada, would see the UK economy shrink by 6.2 per cent, with an annual tax loss of £36 billion and an average cost per household of £4,300 per year. Relying on WTO rules, with no special EU trade deal, would cause the most damage, with the economy shrinking by 7.5 per cent, £45 billion in annual lost tax and an average cost per household of £5,200 per year.

The treasury assessment is broadly in line with independent analyses from the London School of Economics, Oxford Economics and others. Paul Johnson, director of the Institute for Fiscal Studies, said it was impossible to predict how big the British economy would be in 15 years, but the report was right about the "direction of travel".

Ukip donor and Leave campaigner Arron Banks said the "flimsy report hasn't even successfully produced the sort of nightmare vision which George Osborne wants to sell us. Their worst-case scenario of £4,300 per household is a bargain basement price for the restoration of national independence and safe, secure borders."

Denis Staunton

Denis Staunton

Denis Staunton is London Editor of The Irish Times