Think-tank warns Chancellor over CGT increase The Centre for Policy Studies has urged the Treasury to ignore proposals that call for an increase in capital gains tax. The think-tank issued the warning to Chancellor Rishi Sunak after the Office for Tax Simplification suggested that doubling rates and reducing exemptions could raise around £14bn. Centre for Policy Studies tax expert Tom Clougherty has questioned the proposals, saying: “Fully aligning CGT with income tax would be a big mistake.” He added: “Doubling the tax paid on capital gains would deter investment, punish saving, and leave us with a very uncompetitive system internationally.” Mr Clougherty said minsters should look to simplify the tax system but added that the Government “needs to make sure it also supports entrepreneurs, savers, and economic growth.”