Pay for it with a 95% inheritance tax at death. Universal, with no asset-class exemptions, applied to all wealth transferred at death rather than to income earned during life.
Current Assessment
Income tax and National Insurance raised £475bn in 2024/25, 55% of the tax HMRC collects, all of it dependent on wages and other earnings. The Economic Renewal pillar argues that this base is under pressure from AI, from income being reclassified as capital, and from profit-shifting. UK household wealth stands at £10.8tn, up £218bn (about 2%) in 2024, and is taxed at a fraction of the effective rate applied to earnings. The proposal is a 95% tax on all wealth passed on at death, paying for a substantial income tax cut. It would be phased in over two stages and protected by constitutional entrenchment against the kind of gradual erosion that hollowed out Sweden's inheritance tax between the 1970s and 2004.
Evidence
Income tax and NI raised £475bn in 2024/25, 55% of the tax HMRC collects, all of it dependent on wages and other earnings. UK household wealth stands at £10.8tn, up £218bn (about 2%) in 2024. The effective inheritance tax rate on the largest estates falls to around 12%, against a 40% headline rate, once Business Property Relief and the other routes listed in the Tax Avoidance pillar are used, and more than two-thirds of that relief goes to around 400 estates a year.
The wage-based tax base is under pressure (through AI, the reclassification of income as capital, and profit-shifting to low-tax countries, each covered in the Tax Avoidance pillar), while the wealth base is larger and taxed at a fraction of the rate applied to earnings. A tax system that depends on the pressured base while leaving the growing one largely untouched can't last. This step is the project's own reasoning, drawing the sourced facts above together; no single source makes it.
That reasoning supports several responses, not just this one: gradual reform of the existing 40% inheritance tax (already under way through CGT at 24%, carried interest reform and the 2027 pension change); an annual wealth tax instead of a transfer tax (compared in full in Wealth Tax or Inheritance Tax?); the wider, sequenced package of land value tax, corporation tax reform, carbon pricing and a financial transaction tax set out in Revenue Architecture; or this proposal, a 95% transfer tax paying for a substantial income tax cut.
Choosing the 95% transfer tax over gradual reform or an annual wealth tax rests on two value judgements this project states openly, because the evidence alone doesn't decide them. The first is that limiting unearned inherited advantage matters more, at the margin, than protecting inheritance as an unconditional right. The second is that permanence (a constitutional rate, an independent authority) is worth the extra cost and political difficulty, given that Sweden's strong inheritance tax was first eroded by reliefs for the wealthiest and then cut by a simple majority. A reader who gives more weight to family continuity, or who thinks gradual reform is politically more durable than constitutional protection, isn't wrong about the evidence; they weigh it differently.
A 95% inheritance tax at death, applying to everyone with no exemptions by asset class, phased in over two stages (60–70% on estates above £2 million, then the full rate), and protected by constitutional entrenchment and an independent authority. The falsification test below says what would show that this design, including the protections around the rate and not just the rate itself, isn't working.
Assumptions
The numbers behind this claim, and the assumptions each one depends on, are set out in full in Revenue Architecture §8.1–8.2. In summary:
- Whether Stage 1 removes the spousal exemption. This isn't yet decided. It makes the difference between £10–12bn and £13–15bn a year in Stage 1 revenue, and a much larger share of the eventual base at the full 95% rate.
- Wealth keeps growing through 2035–2045. The full-rate ceiling (about £95–110bn a year at today's values) assumes household wealth keeps growing at its recent rate through the transition, without a housing correction or a fall in asset prices caused by the reform itself.
- The valuation system and constitutional protections hold. Getting anywhere near the full-rate ceiling assumes the protections below stop the effective rate drifting down the way the current 40% system's has, to between 12% and 25% depending on estate size.
- Superseded 14 October 2026: the £1–4tn transition gap. Income tax is now cut only as far as proven revenue pays for, instead of being abolished, so there is no transition to finance.
- Almost all of the revenue arrives late. About £10–15bn a year in Stage 1, against a full-rate ceiling of about £95–110bn a year at today's values, so the income tax cut this claim pays for is small in the early years.
Stage 1's own number, worked out directly from HMRC's 2023–24 data on estates by value band: applying the proposed 60–70% rate to the £17.4–21.1bn or so currently held in estates above £2m gives roughly £10–15bn a year, a small fraction of the £475bn that income tax and NI raise.1
Falsification Test
Cross-Pillar Relationships
| Pillar | Connection |
|---|---|
| Public Debt | From Stage 2, a share of this claim's receipts goes into the Sovereign Wealth Mechanism (a separate claim, below) to smooth their year-to-year swings. |
| Demographics | Connected, 21 September 2026. Demographics used to attribute to this pillar its own idea of recycling revenue into early-life public goods (housing, childcare, a citizen's endowment). It now presents the idea as its own and says it's unfunded, because Economic Renewal §4.1 puts all projected revenue towards cutting income tax. See the Cross-Pillar Impact Map. |
| Housing | Calls this claim "the comprehensive backstop" that closes the routes by which housing wealth passes between generations. That only holds at Stage 2 scale, not in Stage 1's £10–15bn-a-year years. |
| Agriculture | Connected. Agriculture §5 now addresses the reform directly, alongside its own farm succession crisis, and relies on the equity-stake and staged-payment mechanisms in Economic Renewal §4.3 to prevent forced farm sales. Whether those general protections are enough for farmland is still untested. |
Challenges
No challenges submitted yet. Submit one via Challenge a Claim.
Update History
- 23 October 2026: Rewritten in plain prose. The Agriculture row, which still said the reform wasn't addressed in the Agriculture pillar, now reflects Agriculture §5. "Labour income base is shrinking" softened to "under pressure", since income tax receipts are still rising in cash terms.
- 14 October 2026: Audit. Swedish chronology corrected (70% top rate from the late 1950s, family-firm reliefs from the 1970s, top rate cut to 30% in 1992 not 1991; Henrekson & Waldenström 2016). "55%+ of all tax receipts" corrected to 55% of HMRC receipts. "Household wealth growing at 5–7% a year" corrected: ONS puts 2024 growth at £218bn, about 2%.
- 14 October 2026: Full-rate revenue corrected. The claim used to cite £200–450bn a year at full scale, based on an annual wealth transfer of £200–400bn now, rising to £350–450bn at the boomer peak. No source supports those transfer figures; the best estimates are roughly £100–115bn a year now (Resolution Foundation from HMRC data; Cebr for Kings Court Trust). The theoretical ceiling at 95% on every pound is about £95–110bn a year, about a fifth of income tax and NI. The proposal's pairing changed from abolishing income tax to cutting it as far as this revenue pays for.
- 15 September 2026: Stage 1's revenue estimate worked out for the first time, from HMRC's 2023–24 data on estates by value band. Numbers Ledger and Assumptions Register added to Revenue Architecture §8.1–8.2. See commit
a2dc4c2.