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Business
Apr 23, 2026
Analyzed by GPT OSS 120B

UK Borrowing Beats Forecast but Iran Conflict Looms Over Fiscal Outlook

AI Summary
The UK recorded a £132bn borrowing total for FY 2025/26, slightly below the OBR forecast, pushing the debt‑to‑GDP ratio to a six‑year low of 4.3%. However, rising oil prices above $100 a barrel and the deadlock in the Strait of Hormuz threaten to reverse the modest fiscal gain.

Lead: Borrowing Undershoot Meets Geopolitical Headwinds

Britain's public sector borrowing for the year ending March 2026 came in at £132bn, just under the £132.7bn forecast by the Office for Budget Responsibility (OBR). While the figure marks a six‑year low in the debt‑to‑GDP ratio, a flare‑up in the Iran‑Saudi conflict and oil prices topping $100 a barrel could quickly erode the fiscal cushion.

UK Fiscal Year 2025/26 Borrowing Falls Below OBR Forecast

New data from the Office for National Statistics shows that both income tax and VAT collections exceeded expectations, while public‑sector spending was slightly lower than projected. The result was a full‑year borrowing shortfall of about £0.7bn versus the OBR estimate.

Numbers Show Debt‑to‑GDP at Six‑Year Low Amid Rising Oil

  • Borrowing: £132bn (FY 2025/26)
  • Debt‑to‑GDP ratio: 4.3% (six‑year low, down 0.9 pp YoY)
  • March borrowing: £12.6bn, the lowest March figure since 2022
  • Oil price: > $100 per barrel following a deadlock in the Strait of Hormuz

Geopolitical Tensions in the Strait of Hormuz Threaten Fiscal Outlook

Economists warn that the Iran‑Saudi confrontation could push borrowing higher, raise debt‑to‑GDP, and strain Chancellor Rachel Reeves's fiscal plans. Companies such as Sainsbury, Foxtons and WH Smith have already flagged potential profit hits and a more cautious outlook.

Outlook: Potential Borrowing Surge and Market Volatility

Analysts from Quilter and Capital Economics project that borrowing could overshoot the OBR forecast by up to £29bn in FY 2026/27 if energy price shocks persist. Higher gilt yields and tighter fiscal headroom may force the government to rely more on tax adjustments, limiting its ability to support households and businesses amid rising oil costs.