“Elected Greens will push too for the reform Capital Gains Tax (CGT) by aligning the rates paid by taxpayers on income and taxable gains. This would affect less than 2% of all income-tax payers.”

Where it stands

The Green Party is not in government, so the card stays at Promised.

What has happened

1. Jun 2024Green Party manifesto pledges to push to align the tax rates on income and on capital gains, Promised

About the cost

Negative because the pledge raises money. Year shown: the end of the Parliament, the year of the party's figure. Party figure: about £19bn a year by the end of the Parliament (budget background paper, page 3). Independent estimates depend on the design. The Office of Tax Simplification (2020) put a static figure for aligning the rates at about £14bn a year, and said "nothing like this amount would be raised in practice". CenTax (September 2026) estimates £19.7bn more in 2030, but only for a package that also adds an investment allowance, ends the tax-free uplift at death and taxes gains when people leave the UK. HMRC's official estimates stop at a 10-point rise, show that rise on the higher rate losing £3,565m in 2028-29, and cannot be scaled up. No official costing of full alignment exists. Low–high is an editorial ±10% because the party gives a central figure only.

• Green Party: Investing in Hope, budget background paper (PDF), page 3
• Office of Tax Simplification: Capital Gains Tax review, first report (Nov 2020), page 39
• CenTax: Taxes at the top (Sep 2026), page 19
• HMRC: Direct effects of illustrative tax changes, tables (June 2025, ODS)

More detail

Related promises

• Abolish inheritance tax on the family homeConservative PartyPromised
• Apply a windfall tax to bank profitsGreen Party of England and WalesPromised
• Raise the tax-free personal allowance to £15,000Liberal DemocratsPromised