The International Monetary Fund has warned that a further escalation in the Iran war could push the global economy into recession, with the UK at risk of taking a bigger hit than any other G7 nation.
In a warning issued against what it described as an increasingly volatile backdrop, the Washington-based lender said the economic damage from the conflict in the Middle East was steadily growing. It said the outlook had deteriorated enough for it to cut its growth forecasts for 2026, reflecting the impact of the war so far.
The IMF’s assessment comes at a sensitive moment for governments and central banks already facing pressure from weaker growth, higher uncertainty and the possibility of renewed energy-market disruption. A wider escalation in the conflict could add another major shock to the global economy, with oil prices and trade conditions among the key concerns for policymakers.
According to the fund, the UK faces the sharpest downgrade among the G7 economies. That leaves Chancellor Rachel Reeves arriving at the IMF with limited room to argue against the revised outlook for Britain. The downgrade also adds to the pressure on the government as it seeks to reassure markets and voters that the economy can avoid a deeper slowdown.
The IMF also lowered its growth expectations for the United States and for the global economy more broadly. While the source material does not set out the exact revised figures, the direction of travel is clear: the fund believes the economic effects of the Iran war are worsening rather than easing.
That judgment will intensify concerns about how quickly geopolitical shocks can feed into wider financial and economic instability. A prolonged or expanded conflict in the Middle East could affect supply chains, energy costs and business confidence across advanced economies and emerging markets alike.
For Britain, the IMF’s warning is especially significant because the country is already facing a difficult growth environment. A further deterioration in global conditions would make it harder for the government to meet its fiscal and economic objectives, and could limit the scope for policy support if external shocks deepen.
The warning also underscores how exposed the world economy remains to developments far beyond traditional domestic indicators. A conflict that began in the Middle East now has the potential, in the IMF’s view, to slow activity well beyond the region and place the global recovery at risk.
As the IMF meets with policymakers, the central message is one of rising caution. Unless tensions ease, the fund believes the consequences could extend from the energy market to household spending, investment and overall growth — with the UK among the economies most likely to feel the strain.
The revised forecasts are a reminder that the economic cost of war can build gradually before becoming visible in headline growth numbers. For now, the IMF is signalling that the threat is no longer confined to the region itself. It could, in the wrong circumstances, become a global problem.
