End Retrospective Tax Changes and Review IR35
Liberal Democrat · what the evidence says
An independent, source-checked look at Liberal Democrat’s policy “End Retrospective Tax Changes and Review IR35” — what it would actually do across the things that affect your life. Every claim below quotes the source behind it. How this works.
Tax & the money you keep — Helps
minor · moderate confidence
Ending the loan charge would reduce tax bills for a specific group of contractors and freelancers who face large retrospective demands, improving their take-home pay. The IR35 part is only a review with no committed outcome, so its effect on take-home pay is uncertain.
The evidence
- The policy commits to ending retrospective tax changes such as the loan charge. — libdems.org.uk (manifesto) — “End retrospective tax changes such as the loan charge brought in by the Conservatives”
- The loan charge created large and unaffordable tax bills for individuals, causing significant financial hardship. — commonslibrary.parliament.uk (government) — “significant financial difficulties, "huge and wholly unaffordable bills," and reports of "severe anxiety and family breakdown" for thousands of individuals”
- The loan charge was widely regarded as retrospective, reopening closed tax years going back to 1999. — commonslibrary.parliament.uk (government) — “it effectively brought past tax years (going back to 1999) into charge, and in some cases, re-opened closed tax inquiries”
Biggest unknown: Whether the IR35 review leads to any concrete change in tax liability for self-employed people — a review with no committed outcome could produce nothing material.
Our reading: This policy has two distinct elements under O11. The first — ending retrospective tax changes like the loan charge — is a concrete commitment. The loan charge imposed large bills on individuals by aggregating decades of outstanding loan-based remuneration into a single tax year, in circumstances widely described as retrospective. Ending this would directly reduce the tax burden on those still facing outstanding liabilities, improving their take-home position. This is a genuine O11 improvement for a specific, limited population (thousands of individuals, not millions). The second element — reviewing IR35 — is aspirational only. 'Review' is a soft verb with no committed instrument, no statutory duty, no quantified target. The IR35 reforms demonstrably increased the tax burden on around 120,000 contractors by an average of £10,000 annually, so a reform that reduced that burden would be an O11 improvement. But a review alone cannot be scored as an improvement: under the soft-verb rule, the direction of effect cannot be determined until a concrete outcome is committed. The overall verdict is therefore a minor improvement, driven by the loan charge commitment, constrained by the speculative nature of the IR35 element. The affected population for the loan charge is in the thousands; the IR35-affected population is larger (120,000+) but the policy delivers nothing certain there. Confidence is moderate: the loan charge commitment is clear, but the scale of remaining liabilities post-McCann review reforms is uncertain.
Public finances & the next generation — Hurts
minor · moderate confidence
Ending the loan charge would forgo recovery of tax debt on avoidance schemes, and a fairness-framed review of IR35 points toward loosening rules that currently raise significant revenue — both weaken the fiscal position. The main caveat is that 'review' is a soft verb, so the IR35 fiscal impact depends entirely on what, if anything, changes.
The evidence
- The loan charge was designed to recover tax from schemes where individuals were paid via loans not expected to be repaid, primarily to avoid income tax and NICs. — commonslibrary.parliament.uk (government) — “individuals being paid in the form of loans that were not expected to be repaid, primarily to avoid income tax and National Insurance contributions (NICs)”
- A partial reform of the loan charge (McCann review, November 2025) was OBR-certified to produce net negative exchequer impacts across the forecast period. — gov.uk (media) — “The Office for Budget Responsibility (OBR) certified that these measures related to the McCann review would have an Exchequer impact of -£25 million in 2025-26, -£95 million in 2026-27, -£30 million in 2027-28, +£35 mill…”
- The IR35 reforms were prompted by HMRC estimates that non-compliance cost the Exchequer £440 million annually in the public sector in 2016-17. — publications.parliament.uk (government) — “HMRC estimates of significant non-compliance, costing the exchequer £440 million annually in the public sector in 2016-17”
- The 2017 and 2021 IR35 reforms shifted responsibility for employment-status determination from the contractor to the client, in both the public and private sectors. — commonslibrary.parliament.uk (government) — “Reforms in 2017 (public sector) and 2021 (medium and large private sector) shifted the responsibility for determining IR35 status from the contractor to the client”
Biggest unknown: Whether the IR35 review results in a full rollback, targeted fixes, or no legislative change — the difference is hundreds of millions in annual revenue.
Our reading: Two fiscal signals point in the same direction. First, the loan charge: it was introduced to recover tax avoided through disguised-remuneration schemes. Even the already-implemented partial reform (McCann review) was OBR-certified to cost the Exchequer a net negative sum across the forecast period. Going further — fully ending the charge — would forgo additional recovery of legally established tax debt. This is debt forgiveness on consumption-side avoidance, not productive investment, so it worsens the debt path. Second, reviewing IR35: the reforms were introduced specifically because non-compliance was costing hundreds of millions annually (£440m in the public sector alone in 2016-17 per parliamentary sources). The policy frames the review as a fairness measure for self-employed people, which signals loosening rather than tightening. Any material rollback risks unwinding significant revenue. The £4.2bn figure from E20 is from an industry source and cannot alone determine magnitude, but the institutional baseline (E18) and the direction of travel are consistent with a fiscal cost. The counterfactual — no policy change — preserves both the loan charge recovery and existing IR35 revenue. The 'worsens' direction therefore leans with the evidence. Magnitude is minor rather than moderate because: (a) 'review' is a soft verb with no committed instrument or quantified target, so the IR35 outcome is uncertain; and (b) the loan charge affects a bounded population and partial reform has already been implemented. Confidence is moderate because the scale of IR35 change is genuinely unspecified.
Good work & fair pay — Mixed picture
minor · low confidence
This policy promises to stop future retrospective tax demands like the loan charge, which would improve security for self-employed people, and to review IR35 rules — but a 'review' with no committed reform means the benefit to most contractors is uncertain. The people most affected are a relatively small subset of the workforce.
The evidence
- The loan charge caused significant financial hardship — huge bills and reports of severe anxiety and family breakdown — for thousands of affected individuals. — commonslibrary.parliament.uk (government) — “significant financial difficulties, "huge and wholly unaffordable bills," and reports of "severe anxiety and family breakdown" for thousands of individuals”
- The loan charge was criticised for its retrospective nature, effectively bringing tax years going back to 1999 into charge and re-opening closed enquiries. — commonslibrary.parliament.uk (government) — “The Loan Charge faced widespread criticism for its "retroactive" or "retrospective" nature, as it effectively brought past tax years (going back to 1999) into charge, and in some cases, re-opened closed tax inquiries”
- Many organisations adopted blanket bans on personal service companies, reducing contracting opportunities. — ipse.co.uk (media) — “Many organisations adopted "blanket assessments" or outright bans on engaging Personal Service Companies (PSCs) to mitigate compliance burdens and risks”
Biggest unknown: Whether the IR35 review leads to any concrete reform, and what that reform would look like — a review that concludes with no change has no effect on contractor pay or security.
Our reading: The policy has two distinct elements that warrant separate assessment. On the loan charge: the commitment to end future retrospective tax changes is concrete. The evidence shows the loan charge caused severe financial hardship for thousands of self-employed individuals, with huge bills and documented personal distress. Preventing future policy of this type would provide genuine security improvements for self-employed workers going forward — a real, if narrow, improvement to job security and financial wellbeing. On IR35: 'review' is a soft verb with no committed instrument, budget, statutory duty, or quantified target. The evidence shows the 2021 reforms materially worsened conditions for contractors — 120,000 directly affected, a third leaving self-employment, average tax rises of £10,000 per year, and widespread blanket bans by clients reducing work opportunities. A review that led to reform reversing or mitigating these effects could meaningfully improve pay and security for self-employed workers. But a review that concludes with no change, or recommends only marginal tweaks, delivers nothing. The policy text provides no basis for distinguishing between these outcomes. The verdict is therefore mixed: one element (loan charge) is a real if modest commitment with a plausible positive effect on a small population of self-employed workers; the other (IR35 review) is aspirational, with no mechanism committed and uncertain outcome. The overall population affected is a minority of the workforce, keeping magnitude at minor. Confidence is low because the pivotal element — what the IR35 review actually produces — is entirely unspecified.
Equal treatment & democratic rights — Helps
minor · low confidence
Ending retrospective tax changes would strengthen due-process protections for taxpayers caught by charges that effectively reach back decades. The gain is modest because significant loan-charge reforms have already been made, and the IR35 commitment is only a review, not a guaranteed fix.
The evidence
- The loan charge was widely criticised for its retrospective nature, reaching back to loans made since 1999, and in some cases re-opening closed tax inquiries. — commonslibrary.parliament.uk (government) — “The Loan Charge faced widespread criticism for its "retroactive" or "retrospective" nature, as it effectively brought past tax years (going back to 1999) into charge, and in some cases, re-opened closed tax inquiries”
- The House of Lords Economic Affairs Committee found the loan charge's impact undeniably retrospective, despite HMRC's technical argument that it was a new charge on outstanding balances. — tax.org.uk (media) — “critics, including the House of Lords Economic Affairs Committee, found its impact undeniably retrospective”
- The loan charge caused significant financial difficulties and severe personal hardship for thousands of individuals. — commonslibrary.parliament.uk (government) — “This led to significant financial difficulties, "huge and wholly unaffordable bills," and reports of "severe anxiety and family breakdown" for thousands of individuals”
- IR35 reforms shifted employment-status determination from contractor to client, with HMRC rushing implementation and providing poor guidance in the public sector rollout. — publications.parliament.uk (government) — “The Public Accounts Committee also highlighted that HMRC "rushed implementation" and provided "poor guidance" for the public sector reforms”
Biggest unknown: Whether 'ending retrospective tax changes' is enacted as a binding statutory principle or remains a political commitment with no new legal protection — and how far any IR35 review translates into changed rules rather than further study.
Our reading: The loan charge's retrospective reach — effectively taxing transactions from as far back as 1999 in a single year and re-opening closed inquiries — represents a genuine due-process and rule-of-law concern within O9's scope. A statutory commitment to prevent such retrospective charges would strengthen the principle that individuals can rely on the settled legal position at the time of their actions, a core element of due process. This is a real O9 improvement, not merely a redistributive or economic one. However, the magnitude must be kept minor for two reasons. First, the loan charge has already been substantially reformed through two independent reviews: the Morse review removed 11,000 people entirely, and the 2025 McCann review produced up to 70% liability reductions for most remaining cases. The marginal due-process gain from a further commitment is real but incremental. Second, the IR35 element is framed only as a 'review' — with no committed instrument, quantified target, or statutory duty — so it earns only candidacy under the soft-verb rule. It cannot itself be scored as an improvement until a concrete mechanism is in place. On counterfactual grounds: absent this policy, the risk of future retrospective tax measures remains; a binding principle against them would provide a meaningful incremental protection. But confidence is low because the policy's legal form is unspecified — the difference between a political statement and an enacted statutory prohibition on retrospective taxation is decisive for the O9 effect.