For Journalists — What Is Reliable, What Is Contested, What Should Not Be Repeated

A working source-quality reference for journalists writing about the April 2026 UK inheritance tax reform. Each major claim with the source, what it does and does not establish, and a confidence level.

For journalists: what is reliable, what is contested, what should not be repeated

A meaningful share of public coverage of the April 2026 UK inheritance tax reform repeats specific factual claims that are wrong, contested, or systematically over-stated. This piece walks through the claims that appear most often, with sources, and a plain assessment of whether they should be carried forward in your copy.

The mechanics of the reform — solid

Claim. From 6 April 2026, 100 per cent Business Property Relief is capped at £2.5 million per person of qualifying APR/BPR property. Above the cap, 50 per cent relief applies, producing an effective IHT rate of 20 per cent. The allowance is transferable between spouses and civil partners. The £2.5 million allowance is set to be CPI-indexed from April 2031 (subject to a future government implementing it via statutory instrument). AIM-listed shares now receive 50 per cent relief from the first pound; AIM-listed EIS shares fall under this AIM treatment, while unlisted-private-company EIS shares fall under the £2.5m cap-then-50% regime alongside other unlisted trading-company shares. The ten-year interest-free instalment option, previously available for some forms of business property, now extends to all APR/BPR-eligible property.

Source. Finance Act 2026; HMRC published guidance; GOV.UK "Inheritance tax reliefs threshold to rise to £2.5m for farmers and businesses" (December 2025); House of Commons Library briefing CBP-10181.

Confidence. High. These are the rules in force. Use them as stated.

Common error to watch for. Some early reporting and some current opinion pieces still reference the original Autumn 2024 cap of £1 million. The £2.5 million figure is the current law, raised from the original £1 million on 23 December 2025 after a lobbying campaign. The Finance Act 2026 reflects the £2.5 million cap.

Number of estates affected — solid, with care

Claim. HMRC's December 2025 estimate is that approximately 1,100 estates per year will pay additional tax in 2026-27 across the whole APR/BPR reform.

Source. HM Treasury, 23 December 2025; House of Commons Library CBP-10181.

Confidence. High for the headline number. Lower for the breakdown.

Common error to watch for. The 1,100 figure covers the whole reform — agriculture and business assets together. The split is approximately 185 estates with an APR claim (some of whom also claim BPR), and approximately 220 estates that are BPR-only excluding AIM-shares-only holdings. The BPR-only subset that holds unlisted trading-company shares above the threshold is in the low hundreds. Reporting that says "1,100 family businesses affected" or "1,100 farms affected" is wrong on both halves.

The CGT uplift on death — solid, often missed

Claim. Under TCGA 1992 s.62, when a person dies their assets are revalued to market value at the date of death for capital gains tax purposes. Any unrealised capital gain accrued during the deceased's lifetime is wiped out for CGT. The heir inherits at the death-date value as their CGT base cost. The 2026 reform did not change this.

Source. TCGA 1992 s.62; HMRC guidance on CGT and inheritance.

Confidence. High.

Why this matters for your copy. The pre-reform regime taxed qualifying unlisted business assets at zero on death — combination of unlimited 100 per cent BPR plus the CGT uplift. The post-reform regime taxes them at an effective 20 per cent above the threshold. Neither regime is "double taxation" in any usual sense of that phrase. Anyone using the double-taxation framing is making a factual claim that is not supported by the rules as they actually stood before or after the reform. If your source uses this framing, ask them to explain it. They probably cannot.

The OBR 25 per cent migration figure — handle with care

Claim. The Office for Budget Responsibility assumed a 25 per cent departure rate among non-doms with excluded property trusts, and 12 per cent among other non-doms, in its January 2025 supplementary forecast on the non-dom reform.

Source. OBR Costing of reforms to the non-domicile regime: supplementary forecast information release, 30 January 2025.

Confidence. The OBR figures are the official UK government scoring assumptions for the non-dom reform.

What you should not do with this figure. Apply it to the BPR cohort directly. The non-dom population and the BPR-affected population overlap but are not the same. The OBR explicitly described the behavioural response as highly uncertain and the assumption applies to a specific reform and a specific cohort. Any piece that says "the OBR thinks 25 per cent of UK founders will leave" is misusing the figure.

The Companies House director-departure data — handle with care

Claim. Approximately 3,790 UK company directors changed their primary residence to abroad between October 2024 and July 2025, compared with approximately 2,712 in the same period a year earlier — a year-on-year increase of roughly 40 per cent. April 2025 saw approximately 691 director departures.

Source. Financial Times analysis of Companies House records, 2025.

Confidence. The numbers from Companies House records are reliable. The interpretation is contested.

What this does not establish. Whether the departures are caused by the BPR reform specifically. The October 2024 to July 2025 window contains multiple tax-policy changes — the non-dom abolition, residence-based IHT for non-doms, CGT changes, carried-interest changes — and the data does not isolate which change drove which departure. It also does not establish whether the departed directors hold qualifying business assets above £2.5 million, which is what would matter for BPR-driven attribution. Reporting that says "thousands of founders fleeing because of the BPR reform" is over-claiming what the data supports. The data supports "directors are leaving in larger numbers; we cannot yet say which tax change is doing the work."

The Henley & Partners 16,500 figure — do not repeat

Claim. A widely-circulated figure from Henley & Partners projected approximately 16,500 net millionaire departures from the UK in 2025.

Source. Henley & Partners private migration consultancy.

Confidence. Methodologically inadequate.

What happened. Tax Policy Associates, run by the former tax lawyer Dan Neidle, published a forensic critique on 27 July 2025 concluding the methodology does not support the figure. The Tax Justice Network reached the same conclusion separately. The figure is based on a small sample of New World Wealth's database with extrapolation that the methodology cannot bear. If you are about to repeat this number in your copy, do not. If your editor has placed it in your copy, push back.

The "founders fleeing" anecdote set — assess carefully

Claim. Specific named founders have publicly announced relocation, citing the IHT reform among reasons.

Source. Press releases, LinkedIn posts, Sifted reporting, Financial Times reporting on individual cases.

Confidence. The named cases are real. What they prove about the cohort is contested.

How to use them. Anecdotes are evidence of the existence of an effect, not its size. A piece that lists five named founders who have left is establishing that the phenomenon exists. It is not establishing that the cohort is leaving in significant numbers, nor that the named departures are primarily attributable to the BPR reform rather than to other factors (existing residence patterns, lifestyle, other tax changes, family circumstances). Treat the named cases as colour, not as evidence of scale.

The £300 million annual revenue forecast — solid, watch the date

Claim. HMRC forecasts approximately £300 million per year of additional revenue from the APR/BPR reform by 2029-30.

Source. HMRC Tax Information and Impact Note; House of Commons Library CBP-10181.

Confidence. The forecast is the official forecast. Whether it will be met depends on the size of the behavioural response, the operational efficiency of collection, and the rate at which planning erodes the base. Post-reform receipts data over three to five years will resolve this. Until then, treat the £300 million as the forecast, not as the realised figure.

International comparators — useful, easily over-claimed

Claim set. Various pieces in the public debate cite international comparators to support different positions: Australia (no IHT, CGT on realisation), Canada (deemed disposition for CGT at death), the United States ($15m exemption post-OBBBA July 2025), Germany (conditional relief under §§13a, 13b ErbStG), France (Pacte Dutreil regime), Japan (55 per cent top rate), South Korea (50 per cent plus controlling-shareholder premium).

Source. Published tax codes of each jurisdiction.

Confidence. The descriptions of each regime are reliable as descriptions. What they prove about the UK question is contested.

How to use them. Honestly. The UK before April 2026 was, on the available evidence, the only major developed economy to combine unlimited 100 per cent IHT relief on business assets with no operating-business condition beyond a two-year holding rule. The post-reform UK regime sits somewhere in the middle of the international spectrum, not at either extreme. A piece that uses Australia to argue "every other country does this, the UK should too" is over-claiming; Australia is one model among several, and several countries (Japan, South Korea) have stricter regimes than the UK. A piece that uses Germany or France to argue "even the strictest regimes have conditional relief" is selecting a different subset. Both selections are legitimate. The honest version names the spread.

Adviser-survey claims — assess the methodology

Claim set. Various pieces have cited adviser-survey data along the lines of "X per cent of advisers report client enquiries about relocation." Sifted has published reporting of this kind, citing UK private-client tax firms.

Source. Industry surveys, mostly from the firms whose clients these are.

Confidence. Suggestive. Use as colour, not as primary evidence.

What to ask. Sample size, response rate, definition of "client enquiry" (an enquiry about relocation is not the same as a decision), period covered, whether the survey distinguishes BPR-driven enquiries from non-dom-driven enquiries, whether the surveying firm has a stake in the outcome. Most adviser-survey numbers in the public debate fail several of these tests. The numbers can still be useful — they document that the question is on clients' minds — but they should not be presented as evidence of decision-grade behaviour.

Author-position disclosure

The publication this piece appears on is by Doug Scott, a UK tech founder who owns shares in unlisted UK companies and would be affected by parts of the reform discussed. The publication has tried to engage with the question fairly across multiple registers. A journalist using this source-quality reference should know who wrote it and weight the framing accordingly. The factual claims in this piece are anchored to public sources cited in line. The publication's substantive views are set out in the principle piece and are visible from the homepage in distilled form.

What the publication is asking from journalists

Stop repeating the Henley figure. Stop using the double-taxation framing. Stop treating the OBR 25 per cent assumption as a forecast for the BPR cohort. Use the Companies House data as evidence of pressure, not as proof of cause. Treat the named cases as colour, not as evidence of scale.

The honest version of this story — that the reform is broadly defensible in principle, contested in mechanism for one specific asset class, and not yet evidenced enough to settle either way — is also the more interesting story. The country deserves coverage that takes the question seriously rather than coverage that picks a side and runs the standard arguments in support.

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Written by Claude (Anthropic). About 2,400 words. The publication's substantive position is in the principle piece. The interactive financial model is at /uk-tech-iht-model.html. Doug owns shares in unlisted UK companies and would be affected by parts of what is discussed.