British politics is undergoing a fundamental shift in how it is financed, with individual billionaires now playing an increasingly dominant role through a surge in mega-donations to political parties. Research from the IPPR thinktank reveals that £179m has flowed from wealthy individuals into UK political parties since 2019, marking a dramatic acceleration in the concentration of political funding among a small number of exceptionally rich donors.
The scale of this transformation is striking. Between 2001, when donation records began, and 2018, contributions from individual donors giving more than £1m averaged £3.9m annually. However, between 2019 and 2025, that figure surged to £13.1m per year—almost three-and-a-half times higher than the previous period and far exceeding what inflation alone would explain. The research found that 72% of all donations exceeding £1m from individuals since records began have arrived since 2019.
The acceleration intensified following the Brexit party's receipt of £10m from a Thailand-based billionaire and the Liberal Democrats' acceptance of £8m from David Sainsbury, the supermarket tycoon who has since returned to Labour. In some years, such as 2023, analysis found that almost £7 out of every £10 in reported private donations to political parties came from wealthy companies or individuals who gave more than £1m in a single calendar year.
The trend has reached unprecedented levels with the recent donations to Reform UK. The party received a second £36m donation from cryptocurrency billionaire Christopher Harborne, matching an earlier £36m gift from Ben Delo. Together, these two donations totalled £72m in under 48 hours, exceeding the total received by all UK political parties in the previous year, which was just over £69m.
The concentration of wealth in party funding extends beyond Reform UK. The Conservatives' biggest donor, Frank Hester, gave more than £20m before the 2024 election, while Labour's Gary Lubner has contributed more than £9m in total. According to electoral data, there were nine donations of £1m or more to UK political parties in 2025.
Why is this raising alarm?
The concentration of political funding among a handful of billionaires has prompted widespread concern about democratic integrity and the outsized influence of extreme wealth. Harry Quilter-Pinner, executive director of IPPR, characterised the shift as troubling:
Something fundamental has changed in how British politics is funded. Million-pound donations were once exceptional. However, since 2019, mega-donor money has become a much bigger part of our political system. Reform's extraordinary fundraising has accelerated that trend, but this is much bigger than one party or two enormous cheques. This is the Americanisation of British politics, where political parties can become dependent on a handful of people with exceptionally deep pockets.
Civil society organisations have echoed these concerns. Dr Susan Hawley, executive director of Spotlight on Corruption, warned:
Without urgent action to limit the amount that wealthy individuals can give to political parties, we're going to continue to see a staggering inflation of money – and the influence it buys – flowing into the coffers of political parties. The taskforce needs to take decisive action to get big money out of our politics in a fair and even-handed way, so that power and influence is returned to ordinary voters, where it belongs.
Duncan Hames, senior director of policy at Transparency International UK, described the situation as
completely out of control, and makes an irrefutable case for government to bring forward an annual cap on political donations, and fast.
What legal questions surround these donations?
The Metropolitan Police opened a criminal investigation into Reform UK over allegations of foreign funding-law breaches following a News broadcast. The allegations relate to possible offences under the Political Parties, Elections and Referendums Act 2000, which requires donors to be permissible—such as UK-registered voters or UK-registered companies. Reform UK has stated that the money is in line with the law.
What proposals exist to limit mega-donations?
Growing pressure from MPs and civil society groups has led to calls for donation caps. Some MPs have pushed for annual caps ranging from £100,000 to £500,000, while others have proposed limits as high as £1m. Labour members intend to raise the issue at the party's autumn conference, and proposals for a cap are likely to be tabled when the government's elections bill reaches the House of Lords.
The government has already taken one step by introducing a £100,000 annual cap on donations from overseas voters. However, No 10 has been reluctant to introduce a broader cap amid opposition from some trade unions, who fear restrictions could limit their own ability to donate substantial sums in future.
Despite this hesitation, the government has pledged to address the influence of mega-donors on politics. It announced that a new taskforce would examine the issue of mega-donations, signalling that action may be forthcoming.
What happens next?
The government's bill to cap overseas donations at £100,000 is due to continue through Parliament, with the House of Lords scheduled to debate it. MPs are expected to continue debating broader donation-cap proposals when the elections bill reaches the House. The outcome of these discussions will determine whether the UK moves toward stricter limits on individual political donations or allows the current system of mega-donor funding to continue.
Key Facts
- £179m has been donated by wealthy individuals to UK political parties since 2019, with mega-donations of more than £1m rising from an average of £3.9m annually (2001-2018) to £13.1m annually (2019-2025)
- Reform UK received £72m in donations from two cryptocurrency billionaires within 48 hours, exceeding the total donations received by all UK parties in the previous year
- 72% of all donations exceeding £1m from individuals since records began have arrived since 2019
- The government has introduced a £100,000 annual cap on donations from overseas voters and is considering broader caps on individual donations
- The Metropolitan Police is investigating Reform UK over allegations of potential foreign funding-law breaches
