Policy scenario explorer
Headline revenue estimates for wealth-tax policy scenarios, from the open WealthLens microsimulator. Figures are illustrative estimates over a synthetic population (not official forecasts), and every band shows its uncertainty and provenance.
Illustrative estimate over a synthetic v0.1 population (not an official forecast): an annual 1% wealth tax on net wealth above £1,000,000.
- Illustrative estimate over a synthetic v0.1 population (household microdata statistically generated and calibrated to published aggregates), not an official forecast. Treat the figures as indicative, not as a costing.
Band: Pareto-α range.
Scored over 2,000 synthetic households.
Where the revenue comes from
By nation
| Nation | Central | Range (low–high) |
|---|---|---|
| England | £16.66bn | £12.49–24.06bn |
| Wales | £1.66bn | £1.25–2.40bn |
| Scotland | £0.56bn | £0.42–0.81bn |
By wealth decile
How the revenue falls across the population, from the least to the most wealthy tenth.
| Wealth decile | Central revenue |
|---|---|
| Decile 1 (least wealthy) | £0.00bn |
| Decile 2 | £0.00bn |
| Decile 3 | £0.00bn |
| Decile 4 | £0.00bn |
| Decile 5 | £0.00bn |
| Decile 6 | £0.00bn |
| Decile 7 | £0.00bn |
| Decile 8 | £0.00bn |
| Decile 9 | £0.13bn |
| Decile 10 (wealthiest) | £18.75bn |
Sources & assumptions
Modelling assumptions
Each linked to its original source — a peer-reviewed paper or official statistics.
Vermeulen (2018); calibrated to UK WAS + Sunday Times Rich List
Population data sources
The official datasets the synthetic population is calibrated to.
ONS Families and households in Great Britain, 2022
ons.gov.uk/2022 (opens in new tab) accessed 2026-05-30 OGL-3.0
ONS Wealth and Assets Survey (WAS)
ons.gov.uk/file (opens in new tab) accessed 2026-05-30 OGL-3.0