Simplify the tax system
Reform UK · what the evidence says
An independent, source-checked look at Reform UK’s policy “Simplify the tax system” — what it would actually do across the things that affect your life. Every claim below quotes the source behind it. How this works.
Prosperity & living standards — Genuinely contested
n/a · low confidence
Simplifying the tax code could boost productivity and business investment, but the package's fiscal costs are disputed by tens of billions — if the savings don't materialise, the resulting public-service cuts or borrowing could offset or reverse any growth gains. The net effect on living standards is genuinely unresolvable without knowing how the fiscal gap is closed.
The evidence
- The policy commits to a major simplification of the UK tax code, currently over 21,000 pages. — reformparty.uk (manifesto) — “Reform UK will undertake a major simplification of the UK's tax code, citing its current complexity of over 21,000 pages.”
- The policy aims to reduce the tax code to a length similar to Hong Kong's, under 500 pages. — tax.org.uk (media) — “aiming to reduce it to a similar length as Hong Kong's (under 500 pages)”
- The UK tax system contains 1,180 tax reliefs, creating compliance burdens, confusion, and disincentives. — publications.parliament.uk (government) — “the system is "littered with 1,180 tax reliefs," according to HMRC, leading to compliance burdens, confusion, and disincentives”
- The VAT registration threshold creates a cliff-edge, causing a large pile-up of companies just below it. — publications.parliament.uk (government) — “the Treasury Committee noted causes a "huge pile-up of companies just under the [current £85,000] threshold"”
- A simpler tax system could reduce compliance burdens and remove disincentives to invest or grow a business. — publications.parliament.uk (government) — “A simpler tax system could reduce compliance burdens, clarify rules, and remove disincentives to work, save, invest, or grow a business, fostering economic dynamism”
- The IFS estimates that raising the income tax personal allowance to £20,000 alone could cost £50–80 billion a year. — ifs.org.uk (institutional) — “the IFS estimates that increasing the income tax personal allowance to £20,000 could cost between £50 billion and £80 billion a year”
- The IFS argues the overall package would require cuts to public services going far beyond a crackdown on waste. — vertexaisearch.cloud.google.com (media) — “the IFS strongly challenges this, arguing that the claimed savings are highly unrealistic and would necessitate severe cuts to the quality or quantity of public services, amounting to tens of billions of pounds per year …”
- The IFS cautions against extremely optimistic growth assumptions as a means of balancing the books. — vertexaisearch.cloud.google.com (media) — “the IFS cautions against "extremely optimistic assumptions about how much economic growth would increase" as a means to balance the books for Reform UK's proposals”
Biggest unknown: Whether the claimed spending savings are large enough to fund the tax cuts without severe cuts to public services or unsustainable borrowing — the IFS estimates the shortfall runs to tens of billions per year.
Our reading: The case for O13 improvement rests on two real mechanisms: (1) reduced complexity lowers compliance costs and removes disincentives to invest and grow, supported by parliamentary evidence on the 1,180-relief tangle and the VAT cliff-edge; (2) lower marginal tax rates and higher thresholds could lift work and investment incentives. Both are plausible and grounded in cited evidence. However, the policy's fiscal arithmetic is the decisive crux. The IFS — an independent institutional source — estimates the personal-allowance change alone costs £50–80bn annually, and that the overall package understates costs and overstates savings by tens of billions per year. If that gap is not closed, the government must either borrow heavily (threatening debt sustainability and crowding out investment) or cut public services substantially. Either path carries significant downward pressure on real living standards that could offset the supply-side gains from simplification. The policy itself provides no committed mechanism — no statutory process, no independent body, no quantified fiscal framework — for achieving the simplification or demonstrating its funding. 'Improves' requires evidence the mechanism fires at scale; the IFS challenge to the fiscal base is strong enough that no honest single verdict can be reached. The direction is therefore too-uncertain: the supply-side logic is real and cited, but so is the fiscal risk, and the deciding parameter — the true fiscal gap — is unresolved across a very wide range.
Cost of living — Mixed picture
moderate · low confidence
Tax simplification paired with cuts like raising the income tax personal allowance could boost take-home pay for many workers, but independent analysts warn the package is likely underfunded by tens of billions, risking cuts to public services that lower-income households rely on. The benefits also skew toward higher earners rather than the poorest.
The evidence
- Reform UK proposes a major simplification of the UK tax code, currently over 21,000 pages. — reformparty.uk (manifesto) — “major simplification of the UK's tax code, citing its current complexity of over 21,000 pages”
- The policy includes lifting the income tax personal allowance to £20,000 per year. — tax.org.uk (media) — “Lift the personal allowance to £20,000 per year and the higher rate threshold to £70,000”
- The UK tax code currently contains 1,180 tax reliefs, creating compliance burdens and confusion. — publications.parliament.uk (government) — “system is "littered with 1,180 tax reliefs," according to HMRC, leading to compliance burdens, confusion, and disincentives”
- Raising the income tax personal allowance to £20,000 could cost between £50 billion and £80 billion a year. — ifs.org.uk (institutional) — “the IFS estimates that increasing the income tax personal allowance to £20,000 could cost between £50 billion and £80 billion a year”
- The IFS says the package as a whole would cost tens of billions more than claimed, requiring severe cuts to public services. — vertexaisearch.cloud.google.com (media) — “the IFS strongly challenges this, arguing that the claimed savings are highly unrealistic and would necessitate severe cuts to the quality or quantity of public services, amounting to tens of billions of pounds per year …”
- Raising the tax allowance could offer a £480 tax cut for most workers but would largely favour richer households and could reduce Universal Credit for some working individuals. — resolutionfoundation.org (institutional) — “raising the tax allowance could offer a £480 tax cut for most workers, it would cost £11 billion and would generally favor richer households, potentially reducing Universal Credit payments for some working individuals”
- Indirect taxes like VAT bear more heavily on the poorest, who pay 28.1% of disposable income on them versus 9.8% for the richest fifth. — ons.gov.uk (government) — “poorest fifth of people paying a greater proportion of their disposable income on them (28.1%) compared to the richest fifth (9.8%) in FYE 2022”
- The tax cuts and inheritance tax/threshold changes would largely favour those with higher earnings and assets rather than lower-income households. — tax.org.uk (media) — “increase in the income tax personal allowance and higher rate threshold, the abolition of inheritance tax for estates under £2 million, and cuts to Stamp Duty Land Tax would largely favor those with higher earnings and a…”
- A simpler tax system could reduce compliance burdens and remove disincentives to work, save, or invest. — publications.parliament.uk (government) — “A simpler tax system could reduce compliance burdens, clarify rules, and remove disincentives to work, save, invest, or grow a business, fostering economic dynamism”
Biggest unknown: Whether the claimed spending savings are achievable — the IFS says they are not — determines whether tax cuts translate into genuine cost-of-living relief or are offset by public service cuts and fiscal instability.
Our reading: The policy combines genuine tax simplification goals with a suite of tax cuts — most notably raising the personal allowance to £20,000 — that would directly increase take-home pay for workers. For ordinary earners, a £480 annual tax cut is real and immediate cost-of-living relief. Reducing complexity could also lower compliance costs for small businesses, potentially easing price pressures. However, two structural problems undermine the net verdict for ordinary households. First, the distributional pattern is upward: the biggest gains flow to higher earners and asset-holders, while lower-income working households on Universal Credit could see UC clawbacks partially offset their income tax gains. VAT and indirect taxes, which fall hardest on poorer households, are not the primary focus of relief. Second, and more fundamentally, the IFS projects the package is underfunded by tens of billions per year. If the fiscal gap is real — and the IFS, a credible independent body, is emphatic that it is — then either public services must be cut substantially or borrowing rises. Either outcome damages cost-of-living for ordinary households: service cuts reduce the real value of in-kind support (healthcare, social care) that substitutes for cash spending, and fiscal instability can feed into inflation or interest-rate pressure. The upside (tax cuts boosting disposable income) is real but skewed; the downside (fiscal risk and regressive service cuts) is also real and potentially larger in aggregate. This makes the verdict genuinely mixed at moderate magnitude, with low confidence given the deep uncertainty about fiscal feasibility.