Who Owns Britain? UK wealth facts, with sources — independent — verify everything

Could a one-off wealth tax really raise £260 billion for the UK?

Yes. The Wealth Tax Commission, comprising economists from LSE and the University of Warwick, modelled a one-off levy and found it could raise around £260 billion, with the heaviest burden falling on the wealthiest through progressive rate options.

£260bn
estimated yield from a one-off UK wealth tax — Wealth Tax Commission

In 2020 the Wealth Tax Commission published the most comprehensive review of a potential UK wealth tax in fifty years. It was led by world-leading experts in tax law and economics from the London School of Economics and the University of Warwick. Their central finding was that a one-off wealth tax, levied at 1% per year over five years on individual net wealth above a £500,000 threshold, would raise approximately £260 billion.

The Commission drew a sharp distinction between a one-off levy and an annual wealth tax. An annual tax requires assets to be valued every year, which is complex and expensive for illiquid holdings such as private businesses and farm land. A one-off tax is assessed against a fixed historical date, meaning the tax bill cannot be reduced by reorganising assets after the fact. This makes it administratively simpler and harder to avoid.

The progressive versions modelled by the Commission scaled the rate according to wealth level: 3% in total on wealth between £500,000 and £1 million, rising to 8% in total on wealth above £10 million. A couple would need more than £1 million in combined net wealth before paying anything at all. A statutory deferral scheme was proposed for those whose wealth is tied up in a home or private business: they would not be forced to sell, but the liability would be deferred until they eventually did.

The Commission recommended a one-off levy rather than an annual one specifically because it does not distort economic decisions going forward. Future investors, entrepreneurs, and savers would make their choices knowing the tax applied only to wealth already accumulated. The Commission noted that the UK has no modern tradition of a broad wealth tax, and that this approach offered a politically viable route to a large one-off fiscal repair.

“If you have billionaires growing their wealth at 30, 40, 50% in economies which are lucky if they grow 2%, how fast does cancer grow?”— Gary Stevenson, Channel 4 News interview

Common questions

Would a one-off wealth tax affect ordinary homeowners?
The modelled threshold of £500,000 per individual (or £1 million per couple) means many homeowners in expensive parts of the UK could be affected, though at a low rate. Progressive versions concentrate the burden on wealth above £1 million and above £10 million.
What happened to countries that tried annual wealth taxes?
France, Sweden, and Germany all introduced and then repealed annual wealth taxes, largely because of high administrative costs and wealthy individuals restructuring or relocating assets. The Wealth Tax Commission recommended a one-off approach precisely to avoid these problems.
Is the Wealth Tax Commission independent?
Yes. It was a non-partisan academic body funded by the Economic and Social Research Council, bringing together tax law professors, economists, and policy experts. Its findings are peer-reviewed and openly published.

Sources — check them yourself