Three Promises, One Budget: The Trap Waiting for John Healey

When John Healey confirmed the date of his first Budget at the end of July, he promised three things at once: that it would be built on fiscal discipline, that it would meet the government's fiscal rules, and that it would "move money and power out of Westminster, and into every postcode around Britain".¹

That is a lot to ask of one speech, and the arithmetic has got worse ever since. On 21st October, official figures showed public debt passing £3 trillion for the first time. Borrowing in the financial year so far is £97.8 billion, £6 billion more than the Office for Budget Responsibility (OBR) forecast, and inflation rose from 3.1% to 3.5% in September. Kemi Badenoch said national debt is the highest since the 1960s, although measured against the size of the economy it was higher during the pandemic.²

So what exactly is Healey boxed in by? Three things, and they all push the same way.

The squeeze: headroom has halved

The government has a rule that day-to-day spending must be covered by tax revenue by 2029/30. Headroom is the margin by which the Treasury expects to beat that rule, and it is what lets a Chancellor absorb bad news without immediately raising taxes. In March, the OBR put it at £23.6 billion.³

Since then, about half of it has gone. EY estimates it has fallen to £11.3 billion, with rising gilt yields, the interest rate the government pays to borrow, the biggest single drain at around £10 billion. One of its leaders, Mats Persson, says yields have reached their highest levels this century.⁴ KPMG reaches a similar figure of about £12 billion, blaming higher borrowing costs after the war in the Middle East, plus weaker growth.⁵

The locked door: the manifesto

The obvious answer to a shrinking buffer would be to raise income tax, National Insurance or VAT. But Labour's 2024 manifesto promised not to increase taxes on working people, and Burnham has committed to honour it. The accountancy firm S&W calculates that those pledges, together with the commitment on corporation tax, cover almost three quarters of expected tax revenue this year. Even capital gains tax, the most discussed alternative, is forecast to raise £19.8 billion, under 2% of the total, and S&W notes that HMRC's own numbers suggest raising the rate by more than 1% could reduce receipts rather than increase them.⁶ Burnham has also said he is conscious that Labour has already raised taxes twice in recent years.³

That leaves what EY calls a narrow and shallow pool of options, where individual measures raise hundreds of millions of pounds, not billions. Its illustrative package of around £12.5 billion leans on treating research and development spending as capital under the fiscal rules, worth £5 billion, then changes to capital gains tax, a lower cap on the tax-free pension lump sum and a doubled bank surcharge. It also includes a 5p rise in the additional rate of income tax, the only item that breaks a manifesto pledge.⁴ The Financial Times reports that Healey has ruled out the biggest capital gains option, bringing it in line with income tax rates.⁷

The promises already made

The third problem is that Burnham has already spent part of what is left. His first cost-of-living measure removed the 5% VAT on household electricity from 1st October, at an estimated cost of £850 million, which the government says is funded by cancelling the £1.8 billion Digital ID programme. A £2 cap on single bus fares follows in January 2027.⁸ The VAT cut lasts only six months, so Healey must decide whether to extend it beyond March 2027.⁹ EY puts the electricity cut, the bus fare cap and business rates relief for pubs and live music venues at £2.1 billion combined.⁴ LBC adds that Healey is working on more than £1 billion of further help with energy bills this winter.²

Then there is the personal allowance. Burnham has said the frozen allowance was what he heard most about on the doorsteps in Makerfield, but concedes any change would be difficult given the public finances. It has been frozen at £12,570 since 2021-22, and thresholds are due to stay frozen until 2030-31. Raising the allowance by just £500 would cost around £6 billion according to tax expert Dan Neidle, and the full state pension, £12,547 a year, becomes taxable from April 2027 unless something changes.⁸

Beyond that sit the bigger ambitions. EY expects costlier plans on defence, social care and housing to be signalled at this Budget rather than funded, because carrying them now would add around £40 billion of cost that could not be met without raising the protected taxes. Healey is reported to be eyeing autumn 2027 for the spending review that would settle department budgets, defence included.⁴

Three ways out

Economists broadly see three routes, and each has a catch.

The first is to raise targeted taxes now. The Resolution Foundation, which the Press Association describes as influential on the government's thinking, wants around £8 billion of tax rises and headroom rebuilt to at least £20 billion, including a switch that cuts employee National Insurance by 2p and raises income tax by the same amount.⁷ The IPPR proposes capital gains reform, a levy on online retail sales, ending taxpayer cover for Bank of England losses and a temporary bank windfall tax, which its executive director says could raise around £16 billion.¹⁰ The catch is that some of this breaks the manifesto, and the Financial Times reports that Burnham told business leaders he wants "the most pro-business country in the world" and signalled they would face no more tax rises on 28th October.¹⁰

The second is to accept a thinner buffer. The Financial Times reports that the Treasury and Number 10 have discussed setting a lower headroom target than the OBR's March figure, which would soften tax rises and spending cuts. Some gilt investors say rebuilding the old cushion is unrealistic after the surge in yields, while others say anything under £20 billion could be a problem.³ The catch is the bond market itself. Before taking office Burnham suggested Britain should be less beholden to it, but since entering Number 10 he has pledged to stick to Rachel Reeves's fiscal rules.¹⁰

The third is to defer the hard choices. The Resolution Foundation's chief economist, James Smith, has argued this is the wrong approach, and wants a Budget that confronts the problems now.⁷ The case for waiting is that the shock may pass. EY's chief economist notes that the OBR's cyclical upswing scenario would lift headroom to around £40 billion, enough to fund larger ambitions without a tax shock.⁴ The catch is that this is a bet on growth, and KPMG forecasts only 1.3% this year and 1.4% next, with inflation peaking at around 4% in early 2027.⁵

What to watch on 28th October

Five things will tell you most. First, the headroom figure the OBR publishes, and whether Healey accepts less than March's £23.6 billion. Second, whether he eases the freeze on income tax thresholds or tackles the state pension problem. Third, whether the electricity VAT cut is extended beyond March 2027. Fourth, how much of the defence, social care and housing agenda is funded rather than merely signalled. Fifth, the market reaction, because gilt yields will deliver their verdict within minutes.

The fair verdict

Healey is boxed in more by arithmetic than ideology. The war shock has shrunk his room, the manifesto has locked the biggest taxes, and promises already made have used up part of what remained. Supporters will say a modest, targeted Budget that protects living standards while the shock passes is the responsible course. Critics, including the Resolution Foundation, argue that delaying hard choices only makes them harder, and with debt now above £3 trillion the margin for drift is small. Both can be partly right.

What is not in doubt is that Healey asked to be judged on fiscal discipline, devolution and growth in the same speech. On 28th October we find out whether the three can fit together.

Footnotes

1. HM Treasury, Budget to move “power and money out of Westminster, and into every postcode around Britain” (opens in a new tab), 31st July 2026.

2. LBC, Britain’s national debt tops £3 trillion for the first time (opens in a new tab), 21st October 2026. ²

3. City AM, Autumn Budget: Healey weighs slashing fiscal headroom to reduce tax hikes (opens in a new tab), 24th September 2026. ^{2 3}

4. Pound Sterling Live, £12BN in Tax Rises Needed: EY (opens in a new tab), 9th October 2026. ^{2 3 4 5}

5. Express & Star (Press Association), Chancellor’s headroom ‘to halve because of Iran war inflation and weak growth’ (opens in a new tab), 21st September 2026. ²

6. S&W, The manifesto that continues to tie the Chancellor (opens in a new tab), 27th August 2026.

7. LBC (Press Association), Healey warned against delaying tough Budget decisions as fiscal buffer halves (opens in a new tab), 13th October 2026. ^{2 3}

8. interactive investor, Chancellor Healey’s big tax and pension dilemma (opens in a new tab), 22nd July 2026. ²

9. Cambridge Network, Healey sets a pre-Halloween Autumn Budget (opens in a new tab), 28th September 2026.

10. Yorkshire Post, Budget 2026: Chancellor urged to ease cost of living with tax rises (opens in a new tab), 15th October 2026. ^{2 3}