UK Government Borrowing Hits Three-Year Low Amid Growing Concerns Over Iran Conflict Impact

Annual borrowing in the United Kingdom has declined to its lowest level in three years, yet economic experts warn that geopolitical tensions stemming from the Iran war may reverse this positive trend.

According to data released by the Office for National Statistics (ONS), government borrowing—measured as the gap between expenditure and tax revenues—decreased by £19.8bn to reach £132bn in the fiscal year ending March. This represents the smallest annual borrowing figure since 2022-23 and sits marginally below the £132.7bn projection made by the Office for Budget Responsibility, the government's independent fiscal watchdog.

War-Driven Energy Crisis Threatens Economic Outlook

Despite the encouraging borrowing figures, financial analysts caution that improvements may prove short-lived. Rising energy costs triggered by the US-Israeli conflict with Iran pose a significant threat to the UK economy. The effective closure of the Strait of Hormuz, a critical shipping channel that typically accounts for roughly 20% of global oil and liquefied natural gas transport, has already driven up petrol and diesel prices and begun accelerating inflation rates.

Ruth Gregory, deputy chief UK economist at Capital Economics, emphasised that "the full impact from the energy price shock caused by the conflict is still to come."

The International Monetary Fund (IMF) recently warned that the energy disruption stemming from the Iran war would disproportionately affect the United Kingdom compared to other advanced economies. The organisation downgraded its growth forecast for the UK this year from 1.3% to 0.8%.

Fiscal Pressures Mount for Government

Gregory projected that a combination of targeted energy price assistance (estimated at approximately £20bn), elevated interest rates, and economic slowdown would push borrowing upward from £132bn in 2025-26 to around £145bn this year.

Elliott Jordan-Doak, senior UK economist at Pantheon Economics, characterised the situation as "a more daunting 2026-27 ahead." He flagged that the government faces an anticipated £12bn increase in interest payments this year alone, with "any further fiscal support for households or businesses will require additional borrowing."

March Data Shows Mixed Signals

The ONS reported March borrowing of £12.6bn, surpassing analyst expectations despite remaining £1.4bn lower than the previous year and marking the lowest March figure since 2022. For the full financial year, borrowing represented 4.3% of gross domestic product—the smallest proportion since 2019-20, immediately before the COVID-19 pandemic.

Tom Davis, senior statistician at the ONS, noted: "Although spending has risen this financial year, this was more than offset by increased receipts."

Political Reactions Diverge

James Murray, Chief Secretary to the Treasury, stated: "Our deficit is down £19.8bn because of our plan to cut borrowing. In a volatile world the decisions we are taking are the right ones to keep costs down, take back our energy security and cut borrowing and debt."

However, opposition criticism emerged swiftly. Mel Stride, the shadow chancellor, asserted that the annual deficit remained "70% higher than was forecast when they [Labour] came to office," adding that "Labour have left Britain dangerously exposed to economic shocks."