Brexit reduced UK economy by 5.5% and led to tax rises

Brexit has left the UK economy 5.5% smaller than it would have been and added to the squeeze on public services that’s behind strikes crippling the railways and National Health Service, a prominent research group concluded.

The Centre for European Reform said that slower growth is also weighing on the UK Treasury’s revenue and that the tax increases announced in the autumn fiscal statement wouldn’t be necessary if the UK were still in the European Union’s common market.

“The Brexit hit has inevitably led to tax rises, because a slower-growing economy requires higher taxation to fund public services and benefits,” John Springford, deputy director of the CER, said in the report.

The CER said departing the EU single market reduced investment by 11% and goods trade by 7% in the second quarter of 2022. That has contributed to Britain trailing behind almost all other major economies since the end of the pandemic.

His comments follow assertions from Michael Saunders, a former Bank of England policy maker, who said that without Brexit, “we probably wouldn’t be talking about an austerity budget — the need for tax rises, spending cuts wouldn’t be there.”

Springford said that had the UK economy grown in line with his model, tax revenues would have been about £40 billion higher on an annual basis, lessening the need for the £46 billion tax hikes announced by Chancellor of the Exchequer Jeremy Hunt in mid-November.

The CER used an algorithm that draws on the economic performance of 22 other countries that were closely matched to the UK pre-Brexit. It used this to create a hypothetical model — a ‘doppelgänger’ — to show the economic trajectory of the UK had the country not departed the EU.

Springford said that the UK had not suffered a greater economic impact from Covid than other countries, making the Brexit effect easier to distill.