The Middle Class Tax Dilemma: How Britain's Defence Ambitions Could Hit Your Wallet

The Middle Class Tax Dilemma: How Britain's Defence Ambitions Could Hit Your Wallet

**The Resolution Foundation warns that funding a significant increase in defence spending is "unrealistic" without broad-based tax rises—including on middle earners. This comes as the UK faces a £6 billion hole in fiscal headroom due to surging borrowing costs and a global bond market rout .**

Chancellor John Healey is caught in a fiscal pincer movement. On one side, he faces pressure to honour Labour's pledge to increase defence spending to 3.5% of GDP by 2035 . On the other, a dramatic surge in UK borrowing costs has blown a hole in his Budget plans just weeks before his first fiscal statement on October 28 .

The Resolution Foundation, a think tank with close ties to Labour, has delivered a blunt message: if Healey is serious about defence, he must be prepared to raise taxes on middle earners . The analysis argues that the UK's "tax wedge"—the total tax on earnings minus benefits—remains low by international standards, despite the tax rises implemented by his predecessor, Rachel Reeves .

## The Numbers: What the Think Tank Found

The Resolution Foundation's report, "Thin End of the Wedge," reveals that the UK's average tax wedge for a single earner on the average wage rose to 32.4% in 2025 . While this was the largest jump among OECD countries, the UK still sits in the bottom third for the tax burden on average workers .

- **The UK remains the only country in the G7 with a lower tax burden on average workers than the United States** .

- **For a worker earning the UK median wage (£33,000 in 2025), the effective tax rate is still lower than it was before the global financial crisis in 2008** .

- **Of the 16 OECD countries with a higher tax-to-GDP ratio than the UK, all require higher contributions from a single earner on average wages** .

As James Smith, the Resolution Foundation's chief economist, put it: "No other OECD rich country has a bigger state and a lower burden on average workers, so any politician promising both is not being realistic" .

## The Bond Market Headwind

The think tank's warning coincides with a global bond market rout that has driven UK borrowing costs to their highest levels in decades. The yield on 30-year UK government bonds (gilts) surged to its highest since 1998 on Tuesday, while the 10-year yield breached 5.25% for the first time since the 2008 financial crisis . The UK saw the largest jump in bond yields among the G7, a sign of its unique vulnerability to rising interest rates .

The impact on Healey's Budget is immediate. Economists estimate the surge in gilt yields could add **£6 billion to Britain's debt interest bill by the end of the decade**, reducing his fiscal headroom and making it harder to fund new spending pledges .

## A Political Minefield

Increasing taxes on middle earners would be a politically difficult step for Labour, which pledged in its 2024 manifesto not to increase income tax, VAT, or employee National Insurance . Prime Minister Andy Burnham has said he would keep that promise .

However, the Resolution Foundation argues that those who benefit from the improved security provided by higher defence spending should also contribute to its cost . The analysis directly challenges the notion that a "bigger state" can be funded without asking more of average workers.

A government spokesman said: "The first duty of Government is to keep its country safe. The Prime Minister and Chancellor remain committed to fully funding the Defence Investment Plan, meeting our Nato commitment of 3.5pc of GDP on defence by 2035" .

## Frequently Asked Questions (FAQs)

### 1. What is the "tax wedge" and why does it matter?

The "tax wedge" is the total tax on earnings (income tax plus National Insurance) minus any cash benefits. It's a key measure of how much the average worker contributes to the state. The Resolution Foundation argues that the UK's tax wedge is low by international standards, meaning there is room to raise taxes on middle earners.

### 2. How much would it cost to increase UK defence spending to 3.5% of GDP?

Reaching 3.5% of GDP would require an additional **£25bn to £30bn per year**. The Institute for Fiscal Studies has compared this to a 3p rise in income tax .

### 3. What is the £6 billion hole in fiscal headroom?

The surge in UK bond yields has increased the government's debt-servicing costs. Economists estimate this could add £6 billion to Britain's interest bill by the end of the decade, leaving the Chancellor with less money for new spending commitments.

### 4. What is Labour's position on tax rises?

Labour pledged in its 2024 manifesto not to increase income tax, VAT, or employee National Insurance. Prime Minister Andy Burnham has said he will keep that promise. However, the Resolution Foundation suggests that broad-based tax rises, including on middle earners, may be unavoidable.

### 5. What is the "Trident" or "war" budget issue?

The UK is committed to spending 3.5% of GDP on defence by 2035. However, the current Defence Investment Plan (DIP) left a £5 billion funding gap that Healey must now fill. The think tank argues that creative financing alone will not be enough to meet these targets.

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*Disclaimer: This article is for informational and educational purposes only and does not constitute financial, investment, tax, or legal advice. The information provided is based on publicly available analysis from the Resolution Foundation, the Institute for Fiscal Studies, and other cited sources as of September 2026. Economic conditions, policy decisions, and tax rates are subject to change. For personalized advice, please consult with a qualified professional.*