For government readers

If you are reading from inside government — HMT, HMRC, DBT, No.10, a parliamentary committee, the OBR, or a special adviser's office — this page maps your team to the pieces in the publication most directly engaging with the questions in front of you. The pieces are written in the registers each team typically reads in (technical, policy, fiscal, political, communications). The publication does not adjudicate either the principle question or the timing question; the analysis is presented two-sided, within a disclosed frame, and is intended as one input to your team's own work, not as a recommendation.

How to use this page

Each team below has a recommended starting piece and a recommended deeper reading. The starting piece can be read in 10–20 minutes; the deeper reading takes longer and is intended for the analyst on the team whose specific brief overlaps with the publication's analysis. Readers in any team can ignore the routing and use the archive or the general reading guide instead.

The publication has a downloadable policy options paper in PDF and a downloadable 25-year fiscal model in Excel. The PDF is a Treasury-format presentation of the four positions and the four practical measures common ground; the Excel exposes every parameter in the model so a government team running its own analysis can substitute its own assumptions and recompute.

Download freshness: the policy options paper (PDF and Word) and the long article (PDF and Word) were regenerated on the evening of 1 May 2026 and reflect the unbiased rewrites of the principle and timing pieces, the four-positions architecture flatten, and the institutional cross-references. The Excel companion to the interactive model was last regenerated on 30 April 2026 morning; the live model page is canonical for the parameter set.

HMT and HMRC — IHT, BPR, and capital taxes policy teams

The teams whose brief most directly intersects with this publication's analysis. The publication's technical analytical work is on the cohort segmentation and the fiscal model, both of which sit within the chosen frame; a team operating within a horizontal-equity or fiscal-stability frame will find the analytical scope narrower than the frame the team is conducting policy under, and should weight accordingly.

Recommended starting piece: The Amount Question and the Timing Question. Sets out the strongest case for taxing at death and the strongest case for taxing at realisation in equal length, in the voice of each side's strongest defenders, without verdict from the publication. Names the four specific empirical questions on which the cases differ (Holtz-Eakin / heir productivity; Auerbach–Burman lock-in literature; Friedman et al. wealth-mobility paper and its complications; horizontal-equity arithmetic).

Recommended deeper reading, in order:

UK Tech and the IHT Reform — The Funding Stack and the Fiscal Model. The cohort-by-cohort segmentation of how the reform interacts with each segment of the UK tech capital structure. The piece's central analytical contribution is to identify which segments the existing instalment regime under IHTA 1984 s.227 cleanly works for and which it does not; the implications for design follow from that segmentation rather than from a top-down position. Approximately 6,000 words.
The long article. The full operational treatment of the four positions (A: hold the existing mechanism; B: switch to CGT-on-realisation; C: defer; D: raise the threshold for qualifying unlisted trading-company shares). Each position is presented with case-for and case-against in the voice of each side's strongest defenders, in equal length, without rhetorical scaffolding routing the reader toward any one. Approximately 18,000 words; structured for in-depth reading by an analyst.
For Tax Practitioners. The technical reference. Inline citations to Finance Act 2026 s.65, Sch.12, IHTA 1984 ss.104, 116, and 227, plus HMRC manual entries IHTM25520 and IHTM25530. Useful as a cross-reference if your team needs the publication's claims tied back to primary law.

Tools: the interactive 25-year fiscal model exposes every parameter and recomputes the indirect-vs-direct fiscal balance under different assumption sets. The model's "What would change my mind" section names the five empirical findings that would shift the model's qualitative finding. A team running its own analysis can substitute its own parameters and see what falls out.

Where the publication's analysis is weaker than the institutional sources: CenTax (Advani, Gazmuri-Barker, Mahajan, Summers 2025, The Impact of Changes to Inheritance Tax on Farm Estates) uses HMRC inheritance tax data 2018-2022 — the same dataset HMRC analysts use — and proposes alternative designs (minimum-share rule, upper limit on relief) that are not engaged with at depth in this publication. The IFS work on horizontal equity, and the Resolution Foundation budget briefings, are stronger empirical foundations than this publication's. The House of Commons Library briefing CBP-10181 is the canonical UK Parliament reference and is more comprehensive on the legislative process than this publication. A team that wants the strongest UK-grounded analysis should read those sources directly alongside or instead of this publication.

DBT — Tech & Innovation policy

The team whose brief is the cohort the publication's analytical scope is centred on. The frame disclosure applies most directly here: the publication's analysis treats UK tech founders, their early employees, angel investors, EIS investors, VC and growth-equity LPs, and adjacent professionals as the cohort whose interaction with the reform the analysis centres. A DBT team is reading work conducted from inside that scope; the question whether the cohort warrants the analytical weight the publication gives it is the frame question, not a question the analysis itself can answer.

Recommended starting piece: UK Tech and the IHT Reform — The Funding Stack and the Fiscal Model. The cohort-by-cohort breakdown is the most direct map onto the team's brief: pre-profit venture-backed founders, angel investors, VC LPs, growth-equity, EIS portfolios, AIM-listed equity holders, and early employees with vested equity are each treated as separate analytical segments. The piece does not recommend a policy direction; it identifies which segments the existing instalment regime cleanly works for and which it does not, and lets the design implications follow from that segmentation.

Recommended deeper reading:

For UK Tech Founders. Written to founders rather than to policy advisers thinking about founders, but the piece names the contested questions and the strongest cases on each side, and is the most direct engagement with how a founder reading the reform thinks about their own situation. A DBT team reading this is reading the cohort's own framing rather than the publication's view of the cohort.
The readable companion. A 7,000-word non-technical companion that compresses the long article's analytical content into prose. Includes the same balanced four-positions section as the long article, in plain English with shorter paragraphs.
The interactive fiscal model. The model's industrial-strategy parameters — cluster-effect multipliers, serial-founder probabilities, talent-attraction effects — are the parameters most directly relevant to a Tech & Innovation team's analytical work. Adjusting them shows how the fiscal balance shifts when industrial-strategy assumptions are weakened or strengthened.

Where the publication's analysis is most exposed to your team's expertise: the model's parameter choices (the central case's 4–6% pre-death departure rate, the 30–45% next-company probability for serial founders, the 1.20 network-multiplier in the central case) are reasonable defaults from the publication's standing in the cohort but are not anchored in DBT data or in the published academic literature in any cohort-specific UK form. A team with access to internal data or to commissioned research can substitute better parameters and produce a more defensible model. The publication invites this.

No.10 and special advisers

The political-strategic register. Reading time is the constraint; the publication's short pieces are written for that constraint. A SpAd brief that needs the substance compressed into a single document would benefit from reading the short pieces in sequence; a SpAd brief that needs the strongest case on each side of the principle question (for a political-strategic decision about which framing the government should use in public messaging) is served by the principle piece directly.

Recommended starting piece: The Whole Question, in Five Minutes. A neutral compressed summary of the contested questions and the strongest arguments on each side. Approximately 1,500 words; intended to be readable inside a meeting or on a commute.

Recommended deeper reading, in order:

On the Principle — Both Cases at Equal Length. The strongest case for taxing very large intergenerational business-wealth transfers (distributional outcomes, dynamic effects on heirs, horizontal equity, political-economy capture) and the strongest case against (Nozickian property-rights, Hayekian capital-formation, Epstein efficiency, asset-class-fitness) at roughly equal length. Useful for a SpAd brief because the political framing of the reform turns on which version of the principle case is being argued in public; the piece sets out both without picking, so a strategist can see what the public-debate options actually are.
The Short Version. A 1,500-word structured summary in plain language. Names the contested questions and the strongest arguments on each side without verdict. Useful for the meeting where the substance has to fit on one page.
Common Reactions — Critiques and Responses. The piece engages with the meta-question of how the publication has been read and what its limits are. Useful for a SpAd reading the publication as a political artefact rather than as analysis: the piece names openly that the publication is "founder-aligned, national-interest advocacy with serious analytical effort — not neutral IHT analysis," which is the framing a political reader should expect from the source.

Tools: the general reading guide can be circulated to a team that wants to find its own way in; the frame page is useful for a SpAd briefing where the political question is whether the publication's scope-bias matters for the use the brief is being put to.

Communications and press office

The team most exposed to whether claims are reliable, contested, or unsafe to repeat. The publication's for-journalists piece is written specifically for this question; it identifies which claims are anchored in primary sources, which are contested in the practitioner literature, and which should not be repeated.

Recommended starting piece: For Journalists — What Is Reliable, What Is Contested, What Should Not Be Repeated. Each claim in the piece is tagged with a source-grade label (Primary; Secondary; Author judgement / weak secondary), a confidence rating, the citation, and the common error to watch for. Includes a separate references section listing primary law, parliamentary briefings, OBR documents, and other secondary references with URLs. Useful for a press office because the "Do not say" column is explicit (the "16,500 millionaires leaving" figure is tagged as not to be repeated; the OBR's 25% non-doms figure is tagged as not to be applied to the BPR cohort; the Companies House director-departure data is tagged as contested in interpretation).

Recommended deeper reading:

The sources page. The full reference stack, ranked by authority: primary law, official guidance, parliamentary briefings, fiscal modelling, independent policy analysis, professional commentary. A press office can use this page to find the higher-authority source for any claim the publication makes.
Common Reactions — Critiques and Responses. Useful for understanding what the publication openly admits about its limits, which is information the press team will want to know if the publication is being used as a source.

Parliamentary committee staff

Treasury Select Committee, Economic Affairs Committee in the Lords, the equivalents on the devolved tier, and any clerk supporting an enquiry into BPR/APR or the wider IHT regime. The team's brief is to support members in evidence sessions and report drafting; the publication's value is as a structured map of the contested questions and a routing tool to the higher-authority institutional sources.

Recommended starting piece: The long article. The full four-positions analytical treatment, with case-for and case-against in equal length for each of A, B, C, D in the voice of each side's strongest defenders. Useful for committee staff because the structure mirrors the way evidence sessions are typically conducted (each position presented in its strongest voice, the empirical questions on which the cases differ named explicitly, no recommended answer from the publication).

Recommended deeper reading: the principle piece, the timing piece, the funding-stack piece, and the sources page. The combination gives committee staff a structured map of the contested questions, the strongest cases on each side, the cohort-segmentation work, and the higher-authority institutional sources (IFS, Resolution Foundation, CenTax, FBRF, CIOT, Commons Library) where members can be directed for evidence-session source-checking.

OBR analysts

The OBR's January 2025 supplementary forecast information release on the IHT measures is the most relevant published OBR work to this publication. The publication's fiscal model uses the OBR's 25% non-doms departure assumption as a directional input but flags that the figure is from a parallel reform on a different population. An OBR analyst reviewing the publication's work will want to engage primarily with the model.

Recommended starting piece: the interactive 25-year fiscal model. Every parameter is exposed; every formula is recomputable. The downloadable Excel companion contains the same calculation logic in a form an analyst can audit. The model's "What would change my mind" section names the five empirical findings that would shift the qualitative finding.

Recommended deeper reading: the funding-stack piece sets out the cohort segmentation the model relies on; the sources page identifies where the model's parameter inputs come from. An OBR analyst querying any specific parameter should refer to the sources page first and to the model's explanatory notes second.

What this publication does not have, and where to go for it

Several things a government team might want are not in this publication and would be better sourced elsewhere.

Cohort-specific UK behavioural data on pre-death relocation in the BPR-affected cohort: not measured in this publication or in any UK-cohort-specific published study the publication has been able to identify. The Friedman et al. (2024) LSE Working Paper is the closest published work and is one paper with a small interview-based sample on a different population. HMRC microdata, Companies House panel data, and commissioned cohort tracking would all be stronger inputs than the practitioner-anecdote evidence the publication uses.

Cohort-specific UK data on heir productivity for inherited business equity: not measured in any UK-cohort-specific form. The Holtz-Eakin/Joulfaian/Rosen (1993) result and its replications in Sweden (Elinder, Erixson, Ohlsson 2012) and Norway are the best available, with the identification critiques applying. The Office for National Statistics, an academic team with HMRC microdata access, or a commissioned panel study could produce the UK evidence the publication treats as missing.

Distributional analysis of the alternative designs (CenTax minimum-share rule, upper limit on relief): CenTax has done this work directly using HMRC inheritance tax data 2018-2022 and is a stronger source than this publication on the design alternatives. centax.org.uk.

Independent fiscal review of the publication's model: the publication explicitly notes that the model has not had a fiscal-economist review. A government team using the model as one input to its own work should commission such a review or substitute its own parameters.

The publication invites engagement from any government team that wants to query specific claims, request additional analysis, or flag where the analytical scope or parameter choices are wrong for the team's work. The contact details are on the about page. Substantive corrections will be logged on the corrections page with attribution where the team consents.

A reading guide for government teams