OECD Delivers Sharpest Growth Downgrade to UK Among Major Global Economies
The Organisation for Economic Co-operation and Development (OECD) has published a stark assessment of the United Kingdom's economic prospects, delivering the most significant downgrade to growth expectations for 2026 among all G20 nations. This places the UK with the second-lowest projected growth within the G7 group of advanced economies for the current year, trailing only behind Italy.
Forecast Revisions and Comparative Performance
In its latest interim economic outlook, the influential international body revised its forecast for UK gross domestic product (GDP) growth downward by 0.5 percentage points to a modest 0.7% for 2026. The projection for 2027 remains unchanged at 1.3%. This adjustment represents the steepest cut applied to any G20 economy analysed in the report.
Conversely, the OECD upgraded its growth forecast for the United States by 0.3 percentage points for 2026, attributing this resilience to robust consumer spending, particularly among higher-income households. The organisation noted that the UK concluded 2025 on a "weak note" relative to peers like the US, leaving it with fewer positive domestic factors to counterbalance external economic pressures.
Energy Prices and Inflationary Pressures
The primary driver behind this pessimistic reassessment is identified as the surge in global energy prices, exacerbated by the ongoing conflict between the US-Israel and Iran in the Middle East. This geopolitical turmoil has altered inflation trajectories worldwide.
For the UK, the Consumer Prices Index (CPI) inflation is now anticipated to average 4% in 2026, a substantial increase from the 2.5% forecast in December. It is then expected to decline to 2.6% in 2027, still above the previous projection of 2.1%. Consequently, the UK is now projected to have the second-highest inflation rate within the G7 this year, surpassed only by the United States.
Broader Global Economic Context and Risks
The OECD's report indicates that economic growth across the G20—which includes major economies like China, India, and Saudi Arabia—is expected to weaken in the near term before a gradual recovery through 2027. The organisation highlighted significant uncertainties surrounding the Middle East conflict, warning that prolonged disruptions to energy infrastructure and shipping could have far more severe consequences for the global economy than currently anticipated.
A sustained spike in energy prices would substantially increase business costs and fuel inflation, thereby suppressing economic growth. The report cautioned that "a prolonged period of disruption could also result in the emergence of significant energy shortages that would lower growth further." It cited preemptive measures by some Asian governments, such as energy rationing for businesses in India and export restrictions in China, to mitigate shortage risks.
Additional Concerns: Fertiliser and Food Prices
The conflict's impact extends beyond energy. The OECD warned of a sharp increase in fertiliser prices since hostilities escalated in late February, given the Middle East's role as a major producer of components like urea and ammonia. Potential supply shortages "could increase global food prices, with potentially serious impacts to household finances and inflation expectations."
Policy Recommendations and Political Responses
The OECD economists urged central banks worldwide to remain "vigilant" in controlling inflation amidst these heightened global price risks. They advised governments to promote more efficient energy use in residential and industrial sectors and to ensure that support measures for higher energy costs are precisely targeted at the most vulnerable households.
In the longer term, the organisation argued for reducing dependence on fossil fuel imports to diminish vulnerability to such geopolitical shocks.
Chancellor Rachel Reeves responded to the report, stating, "The war in the Middle East is not one that we started, nor is it a war that we have joined. But it is a war that will have an impact on our country." She defended the government's economic strategy, emphasising a plan focused on empowering regional growth, embracing AI and innovation, and establishing a closer relationship with the European Union.
Lindsay James, an investment strategist at Quilter, commented that the UK's growth projections had been "hammered" in the latest report. She noted, "While the UK should still see some growth this year, albeit minimal, it will depend heavily on how the conflict in Iran plays out. There's a risk that the OECD's outlook becomes a best-case scenario."
Sir Mel Stride, the shadow chancellor for the Conservatives, offered a contrasting view, labelling the growth forecast downgrade as "a damning verdict on how vulnerable our economy is, thanks to Labour." He criticised the government's fiscal policies, alleging they have led to stagnant growth alongside rising inflation, unemployment, deficit, and debt interest costs.
