The International Monetary Fund has warned that the war involving Iran could place even more pressure on already fragile public finances, forcing governments into increasingly difficult choices. At the heart of the problem is a familiar but dangerous combination: higher energy and food prices, weaker economic growth and rising borrowing costs.
According to the fund, the conflict risks worsening fiscal conditions across the world at a time when many governments are still carrying the legacy of years of shocks, from the pandemic to inflation to tighter financial conditions. That means the latest crisis does not arrive in isolation. It lands on top of debt burdens that were already elevated and on budgets that were already under strain.
The IMF’s warning is blunt. If governments respond to the rising cost of living with broad and poorly targeted support funded by additional borrowing, they may provide temporary relief while storing up even greater financial pressure for later.
Debt Was Already High Before The Latest Shock
The backdrop to the IMF’s warning is a world economy in which public debt had already climbed sharply. Government finances in many countries have become more vulnerable after a long sequence of expensive economic disruptions, and the new war has added another destabilising force through energy markets and inflation expectations.
The fund believes global debt is now on course to keep rising over the coming years. That reflects not only the direct effect of higher prices on public spending, but also the indirect effect of weaker growth and more expensive financing. When economies slow and borrowing costs rise at the same time, the room for governments to respond becomes narrower.
This is why the current moment matters. Public finances are being tested at a time when they are less resilient than they were before many of the past crises began.
Energy And Food Prices Are Central To The Risk
The IMF’s concern is driven largely by the effect of the conflict on energy and food. Rising prices in these areas tend to hit households quickly and politically, creating pressure on governments to step in with subsidies, tax measures or direct support. But such interventions can be expensive, especially if they are broad rather than targeted.
That creates a fiscal dilemma. If governments do nothing, households and businesses may face a deeper cost of living shock. If they act too expansively, they risk adding to already high debt levels and undermining confidence in their own financial position.
The fund’s message is that the war is not only a geopolitical crisis. It is also a budgetary one, because higher commodity prices can quickly feed into both public spending demands and weaker macroeconomic performance.
The IMF Wants Support To Be Narrow And Temporary
One of the clearest points in the report is that any measures designed to shield households and firms from higher prices should be tightly focused. The IMF argues that support should go to those most exposed and least able to absorb the shock, rather than being spread broadly across the whole economy.
The reason is straightforward. Broad support may be politically attractive in the short term, but it is also much more expensive and can leave governments carrying a heavier debt burden long after the immediate crisis has faded. Temporary and targeted measures, by contrast, are more likely to contain the fiscal cost while still providing protection where it is needed most.
In effect, the fund is urging governments to resist the temptation to answer a price shock with blanket borrowing-heavy programmes that could later prove difficult to unwind.
More Borrowing Could Backfire Quickly
The IMF is especially wary of countries whose public finances are already fragile. For these governments, adding more borrowing to cushion the economic pain could become self-defeating. The fund argues that a better approach is to reallocate spending within existing limits and prioritise crisis-related needs, rather than assuming markets will indefinitely tolerate larger deficits.
This warning reflects a broader change in the financial environment. Investors are now more sensitive to fiscal slippage than they were when interest rates were near zero. In a world of higher rates and more fragile confidence, fiscal mistakes can be punished much faster and much more severely.
That is why the IMF frames the issue in terms of market credibility as well as debt arithmetic. A government that appears to be losing control of its finances may face rising borrowing costs precisely when it can least afford them.
The UK Is A Clear Example Of The Risk
The fund points to recent market episodes as a reminder that financial markets can react rapidly when confidence in fiscal policy weakens. It specifically invokes the experience of the UK in 2022, when the mini budget under Liz Truss triggered a sharp and immediate market backlash.
The broader point is that public debt is no longer a slow-moving concern that can be ignored until later. In the current environment, uncertainty over fiscal plans can translate quickly into higher yields, more expensive debt servicing and a weaker economic outlook. That makes the costs of miscalculation much more immediate.
For governments already facing the political pressure of a cost of living shock, this creates a particularly difficult balancing act. They must respond enough to preserve social stability without convincing markets that discipline has been abandoned.
The Real Danger Is A Bigger Fiscal Trap
What worries the IMF most is not only the immediate cost of the war, but the possibility that it locks countries into a worse long-term position. Higher energy prices can increase inflation, keep interest rates higher and slow growth. If governments respond by borrowing more, debt rises. If debt rises while rates stay elevated, the cost of servicing that debt becomes a bigger burden in itself.
That is how a temporary shock can evolve into a deeper fiscal trap. The crisis may begin with energy and inflation, but it can end with structurally weaker public finances and less room to respond to the next downturn.
The IMF’s message, then, is one of caution rather than alarmism. Governments should act, but carefully. The war may be external, but the damage it does to public finances will depend heavily on how policymakers choose to respond.
