NIESR Says UK PM Andy Burnham Must Raise Taxes or Cut Spending Instead of Borrowing More

A leading UK economic think tank has warned that Prime Minister Andy Burnham has virtually no room to increase government borrowing if he wants to maintain confidence in Britain's public finances, arguing that any major new spending commitments will likely need to be financed through tax increases or reductions elsewhere in the budget. The warning comes from the National Institute of Economic and Social Research (NIESR), which said persistent inflation and higher borrowing costs have significantly narrowed the government's fiscal flexibility just days after Burnham took office. The report adds fresh pressure on the new administration as it attempts to deliver campaign promises on defence, the cost of living, housing, and public services while continuing to adhere to the UK's existing fiscal rules.

Since becoming prime minister, Burnham has announced several measures aimed at easing financial pressures on households, including reducing electricity bills and restoring the £2 cap on most bus fares across England. His government has also pledged increased investment in social housing, defence, and regional economic development. While these initiatives have been welcomed by many voters and local leaders, economists say they will require substantial funding at a time when government finances remain under considerable strain. NIESR argues that relying on additional borrowing is no longer a realistic option because financial markets are closely monitoring Britain's debt levels and fiscal discipline following years of economic uncertainty.

According to the think tank, inflation is expected to remain higher than previously forecast, largely due to rising energy prices and the economic effects of recent geopolitical tensions, including disruption caused by the conflict involving Iran. NIESR now expects UK inflation to continue rising before peaking at around 3.8% in early 2027, delaying a return to the Bank of England's 2% target. Higher inflation reduces the real value of government spending plans while increasing pressure for additional public investment, making it more difficult for ministers to finance new policies without either increasing taxes or cutting expenditure elsewhere.

What the record shows

Stephen Millard, NIESR's Deputy Director for Macroeconomic Modelling, said the government faces difficult choices rather than easy solutions. He argued there is "clearly no scope for increasing borrowing," meaning ministers will have to decide whether to introduce tax reforms, reduce spending in other departments, or reconsider some existing commitments. The think tank suggested several possible reforms, including reviewing welfare spending, reconsidering the long-term cost of the state pension triple lock, modernising council tax, and removing certain VAT exemptions. Economists stressed that these proposals are intended to improve the sustainability of the public finances rather than simply reduce government spending.

Burnham has repeatedly pledged to maintain the government's fiscal rules, which require day-to-day government spending to be funded through tax revenues rather than additional borrowing by the end of the decade. During the election campaign, he also promised not to increase income tax, VAT, or National Insurance contributions for working people. Those commitments have narrowed the range of options available to Chancellor John Healey, who is expected to prepare an Autumn Budget balancing the government's spending ambitions with market expectations for responsible fiscal management. Analysts believe maintaining credibility with investors will remain one of the administration's highest priorities.

The warning reflects a broader debate about Britain's long-term economic outlook. Several independent research organisations have argued that weak productivity growth, an ageing population, rising healthcare costs, and increased defence spending are placing unprecedented pressure on public finances. At the same time, higher interest rates have increased the cost of servicing government debt, reducing the resources available for other priorities. Although borrowing fell in June compared with the previous year, official figures continue to show that the government faces a substantial structural budget challenge over the coming years.

Business groups and financial markets are closely watching how the new government responds. Investors have generally welcomed Burnham's commitment to maintaining fiscal discipline, viewing it as an important signal that the UK intends to avoid the market instability experienced during previous periods of unfunded spending proposals. Economists note that preserving confidence in Britain's bond market is critical because higher government borrowing costs would ultimately increase pressure on taxpayers and reduce future spending flexibility. For that reason, many analysts believe any significant expansion of public investment will need to be accompanied by credible plans showing how it will be financed over the medium term.

What this changes—and what it does not

Despite the difficult fiscal environment, Burnham has insisted that improving economic growth remains the government's top priority. Ministers argue that stronger productivity, increased private investment, and expanded housing construction could gradually improve public finances by generating higher tax revenues over time. However, NIESR cautioned that economic growth alone is unlikely to solve the UK's budget challenges quickly enough to finance all of the government's policy commitments. Instead, the think tank believes policymakers must prepare for difficult fiscal decisions in the coming Budget if they wish to protect both economic stability and investor confidence.

As preparations begin for the Autumn fiscal statement, the government's economic strategy is expected to come under increasing scrutiny from Parliament, financial markets, and independent forecasters. Whether ministers choose tax reform, spending restraint, or a combination of both, the coming months are likely to determine how successfully Burnham can balance his ambitious policy agenda with the fiscal realities facing the UK's economy. The debate underscores a familiar challenge confronting governments worldwide: how to stimulate growth and improve public services while maintaining sustainable public finances in an era of persistent inflation, elevated borrowing costs, and growing geopolitical uncertainty.