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Institute for Fiscal Studies
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Institute for Fiscal Studies

UK independent economic research institute providing fiscal analysis and manifesto costings.

In April 2026 the Institute for Fiscal Studies rejected all five main Holyrood parties' fiscal plans, from the Conservatives' NHS pledge on 8 April to the SNP's manifesto on 21 April, a verdict without precedent in 27 years of devolution.

Last refreshed: 31 July 2026 · Appears in 3 active topics

Key Question

What does it mean for Scottish democracy when the IFS rejects every party's manifesto costings?

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Background

The Institute for Fiscal Studies is an independent UK economic research institute founded in 1969, widely regarded as the authoritative fiscal arbiter during British election campaigns and has assessed every major UK party's spending plans since 2010.

The IFS does not endorse parties or policies; it is financed by charitable and research-council funding, and that independence means its verdicts are difficult for any party to dismiss as partisan.

Its willingness to reject every Scottish manifesto in one cycle signalled how FAR the 2026 campaign's spending pledges had departed from fiscal realism, reinforcing its role as the default reference point whenever UK parties publish costed commitments.

Key Issues
Manifesto verdicts

It fails every Holyrood party at once

The IFS opened its 2026 Holyrood sweep on 8 April, rejecting the Scottish Conservatives' pensioner tax cut and Reform UK's GBP2-3.7bn income tax cut for lacking any credible funding evidence.

By 14 April it had dismissed Scottish Labour's plan within 24 hours of publication, completing a five-of-five rejection rate unmatched in 27 years of devolution; a week later it found the SNP manifesto would ADD GBP1.4bn a year without credible funding, taking the tally to six of six and leaving no party able to use fiscal credibility as a weapon against a rival.

Common Questions
How much would Reform UK's Scottish tax cuts cost?
The IFS costed Reform UK's Scottish income tax cuts at £2-3.7bn per year with no credible evidence they would self-fund. The Fraser of Allander Institute separately confirmed the plan is unaffordable.Source: Institute for Fiscal Studies
What did the IFS say about Scottish party manifestos in 2026?
The IFS found all four major Scottish parties lack credible fiscal plans: Scottish Labour overspends by £4.4bn, the SNP overstates consequentials by £1.6bn, Scottish Conservatives underestimate their NHS pledge, and Reform UK's tax cut has no self-funding evidence. The first such blanket dismissal in 27 years of devolution.Source: Institute for Fiscal Studies
How does the IFS assess party manifesto costings?
The IFS independently reviews party spending promises against available fiscal headroom, examining whether pledges are fully costed, rely on credible assumptions, and ADD up within the stated spending envelope.Source: Institute for Fiscal Studies
What is the IFS manifesto unit?
The IFS manifesto unit assesses every major UK party's spending plans during election campaigns. It has done so since the 2010 general election and is cited by broadcast media as the standard fiscal arbiter.
Is the IFS politically independent?
Yes. The IFS is an independent charitable research institute funded by research councils and charitable grants. It does not endorse parties or policies, which is why its simultaneous dismissal of all four Scottish parties carries particular weight.
Did the IFS reject all Scottish party manifestos in 2026?
Yes. The IFS rejected every major Holyrood party's fiscal plan in 2026: SNP (£1.4bn underfunded), Scottish Labour (£4.4bn gap), Scottish Conservatives (£600m NHS underestimate), and Reform UK (£2-3.7bn income tax cut with no funding). This six-of-six sweep was a devolution-era first.Source: Institute for Fiscal Studies
What did the IFS say about the SNP manifesto in 2026?
The IFS found the SNP's 2026 manifesto adds £1.4bn per year by 2031-32 without credible funding, completing a six-of-six rejection of all Holyrood parties' fiscal plans — a first in 27 years of devolution.Source: Institute for Fiscal Studies
Source Material
Institute for Fiscal StudiesInstitute for Fiscal Studies