Chancellor of the Exchequer Rachel Reeves is under growing pressure to address a £10 billion budget shortfall, as her spending plans face mounting economic and fiscal constraints. With her previous pledge to maintain fiscal discipline while delivering on public spending commitments, Reeves is now facing difficult choices—increase taxes, cut spending, or risk breaching fiscal targets.
Since unveiling her budget in October 2024, which included £40 billion in tax hikes—the largest since 1993—Reeves has maintained that the government’s day-to-day spending must be balanced by 2029. However, a combination of rising government borrowing costs, slower-than-expected economic growth, and increased defense spending has left her with limited options.

Mounting Budgetary Pressures
The Institute for Fiscal Studies (IFS) has warned that Reeves risks breaching her own fiscal targets unless she introduces new tax measures or spending cuts. The Chancellor has repeatedly stated that she would only hold one major fiscal event per year, meaning any new tax adjustments or spending cuts would need to be planned carefully.
Key fiscal challenges include:
- Rising interest payments on government debt.
- Slower economic growth reducing tax revenues.
- Increased defense spending, partly due to global instability and NATO commitments.
- A growing welfare budget, with disability and incapacity benefits projected to reach £100 billion annually by 2029-30. (The Guardian)
Potential Tax Adjustments
If spending cuts prove insufficient, Reeves may have to extend the freeze on income tax thresholds, a move that could generate around £10 billion by 2029-30. This measure, known as “fiscal drag”, results in more people paying higher tax rates as their incomes rise with inflation.
Other tax options being considered include:
- Further increasing corporation tax beyond its current 25% rate.
- Extending the windfall tax on energy companies.
- New levies on digital services and financial transactions.
However, any move to increase taxes could face political resistance from businesses and middle-income earners.
The Role of Welfare Reforms
One of the most controversial areas of fiscal policy currently being debated is welfare reform. The government is considering tightening eligibility for Personal Independence Payments (PIP) and freezing certain benefits, potentially saving over £6 billion.
The Office for Budget Responsibility (OBR) has highlighted the rapid growth of disability and incapacity benefits, which could reach £100 billion annually by 2029-30. The government argues that reforms are necessary to encourage more people back into work, but critics warn that cuts could disproportionately impact vulnerable groups.
Defense Spending Challenges
As geopolitical tensions rise, increased defense spending has become a priority for the UK government. European Commission President Ursula von der Leyen has called for an €800 billion defense fund, which could further strain national budgets.
While Germany has relaxed its debt rules to fund military expansion, the UK has committed to maintaining fiscal discipline, which leaves few options beyond spending cuts or tax increases to fund defense priorities. (The Guardian)

Political and Economic Fallout
The situation presents significant political risks for Reeves. On one hand, implementing new tax hikes could damage public support; on the other, cutting welfare spending could provoke strong opposition from within her own party.
- Market analysts warn that failure to address the budget deficit could undermine investor confidence.
- Delaying tax or spending decisions until November 2025 could prolong uncertainty and lead to market volatility.
- If growth continues to underperform, Reeves may have to reconsider her fiscal rules entirely. (The Times)
Conclusion
Chancellor Rachel Reeves is facing one of the biggest fiscal dilemmas of her tenure. With a £10 billion budget shortfall, she must navigate difficult choices between tax hikes, spending cuts, or risking fiscal credibility.
The coming months will be crucial in determining whether Reeves sticks to her strict fiscal rules or is forced to adjust in response to economic realities.
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A senior at Yale-NUS College with interests in developmental and labour economics, as well as creative non-fiction and poetry. Currently, I’m studying as an Economics major and an Arts and Humanities minor (focusing on Creative Writing) with heavy involvement in the Singaporean journalism scene and involved in research on economic history and educational policy. I’m working as an author for SKC News, Yale-NUS’ student publication, as a writer for Wingspan, Yale-NUS’ alumni magazine, and as a tutor for the NUS Libraries Writer’s Centre. | Linkedin