Future Course of the Iran–US War and Its Impact on the World Economy

Future Course of the Iran–US War and Its Impact on the World Economy

As of 31 July 2026, a United States–Iran war is no longer merely a hypothetical possibility. Military exchanges, attacks on regional bases and severe disruption around the Strait of Hormuz have already created a wider Middle Eastern conflict. The real question is whether the fighting will be contained, prolonged or expanded into a regional war. 

The conflict’s economic importance is unusually high because the Strait of Hormuz is one of the world’s most critical energy corridors. Around 25% of global seaborne oil trade passed through it in 2025, together with almost one-fifth of global liquefied natural gas trade. Alternative pipeline capacity is insufficient to replace normal maritime flows. 

Possible future scenarios

1. Negotiated ceasefire and controlled reopening

The most favourable possibility is a ceasefire negotiated through Oman, Gulf states or another intermediary. Under this scenario:

Iran would gradually permit commercial shipping through Hormuz.

The United States would reduce strikes and military deployments.

Talks could begin over Iran’s nuclear programme, sanctions and regional security.

Oil prices would decline, although probably not immediately return to pre-war levels.

Recent pauses in military strikes have already demonstrated how quickly oil prices can fall when markets perceive a possibility of diplomacy. On 28 July, crude prices fell about 5% following several days without major US–Iran attacks. 

This scenario would produce a gradual recovery rather than an instant return to normality. Shipping insurers would continue charging higher premiums, damaged infrastructure would require repairs and traders would retain a geopolitical risk premium.

Economic result: slower inflation, improved financial-market confidence and stronger global growth in 2027.

2. A prolonged but geographically contained war

The most plausible near-term outcome may be continuing military confrontation without a full invasion of Iran.

The United States could continue air and missile strikes against Iranian military, nuclear and missile facilities. Iran could retaliate through missiles, drones, naval harassment and allied armed groups in Iraq, Yemen, Lebanon or elsewhere.

Under this scenario, neither side necessarily wants complete war, but repeated retaliation makes escalation difficult to control. Oil shipping could continue intermittently, with some vessels passing under military escort and others avoiding the region.

The IMF currently projects global growth of approximately 3% in 2026, with a weaker year followed by a possible recovery in 2027. It expects global headline inflation to rise from 4.1% in 2025 to 4.7% in 2026, largely reflecting energy and conflict-related pressures. 

Economic result: persistent inflation, expensive transport, delayed interest-rate cuts and weaker investment.

3. Severe regional escalation

A more dangerous scenario would involve attacks spreading across Saudi Arabia, the UAE, Qatar, Bahrain, Kuwait, Iraq, Israel and Yemen.

It could include:

sustained attacks on American bases;

strikes on Gulf oilfields, refineries or export terminals;

Houthi disruption of the Bab el-Mandeb route;

attacks around the Suez Canal or Red Sea;

direct participation by additional regional governments;

simultaneous disruption of Hormuz and Red Sea shipping.

This would transform the conflict from a bilateral war into a broad regional energy and shipping crisis. The World Bank says the economic outcome increasingly depends on the extent of damage to Middle Eastern production capacity and how quickly normal shipping returns through Hormuz. 

In such a case, oil could remain above $100 per barrel and might temporarily rise towards $125 or higher. The IMF has warned that a prolonged war extending into 2027, combined with oil near $125, would create a considerably worse global economic outcome. 

Economic result: global stagflation—high inflation combined with weak growth—and a heightened risk of recession.

4. Direct invasion or an attempt at regime change

A large-scale American ground invasion remains less likely than continued air and naval operations because it would be enormously expensive, militarily difficult and politically risky.

Iran’s size, population, terrain and military capabilities would make occupation far more complicated than earlier US operations in Iraq or Afghanistan. An attempted regime-change operation could also produce state fragmentation, refugee movements, attacks on regional infrastructure and years of instability.

Even without invasion, attempts to destroy Iran’s political system through sustained bombing could strengthen hard-line factions and reduce the space for diplomacy.

Economic result: a multi-year geopolitical and energy crisis, heavy military expenditure and major disruption to investment and international trade.

Impact on the world economy

Oil and natural gas

Energy prices are the principal channel through which the war affects the global economy. The World Bank projects energy prices to rise by approximately 24% in 2026, while overall commodity prices could increase by around 16%. 

Countries capable of exporting oil without disruption may gain higher revenues. However, oil-importing countries in Asia, Europe and Africa will face:

larger import bills;

higher petrol and diesel prices;

currency depreciation;

pressure on foreign-exchange reserves;

worsening trade deficits.

LNG markets are also vulnerable because Qatar and the UAE depend heavily on Hormuz for exports. Unlike crude oil, many LNG shipments have no practical alternative route. 

Global inflation

Higher energy prices spread through almost every sector:

diesel raises agricultural and freight costs;

aviation fuel increases airfares;

natural gas raises electricity and industrial costs;

petroleum-based inputs affect chemicals and plastics;

expensive gas increases fertiliser prices;

transport costs eventually raise food prices.

Consequently, central banks may have to postpone interest-rate cuts or even increase rates again. Eurozone inflation had already reached 2.9% in July 2026, partly because of rising energy costs. 

International trade and shipping

Disruption around Hormuz, Bab el-Mandeb and the Suez route increases insurance premiums, freight rates and delivery times. Some vessels may be rerouted over longer distances, increasing fuel consumption and reducing available shipping capacity.

UNCTAD expects merchandise trade growth to slow sharply in 2026, with geopolitical tension and shipping disruptions placing particular pressure on developing countries. 

The impact will extend beyond petroleum. Delays can affect machinery, electronics, food, fertilisers, chemicals and intermediate goods needed by global factories.

Financial markets

In the initial stages of escalation, investors usually move towards perceived safe assets:

the US dollar;

gold;

highly rated government bonds;

shares of defence and selected energy companies.

At the same time, emerging-market currencies and stock markets may experience capital outflows. Airlines, transport companies, chemicals, automobiles and energy-intensive industries would face pressure from rising costs.

Government bond yields may rise if investors believe inflation will remain high and central banks will keep interest rates elevated. US and European bond yields registered substantial increases during July amid renewed Middle East inflation concerns. 

Food security and developing countries

Poor and energy-importing countries will be most vulnerable. Many already face high debt, weak currencies and limited fiscal capacity.

Higher oil, shipping and fertiliser prices could:

increase food inflation;

force governments to expand subsidies;

reduce spending on health and education;

increase sovereign-debt pressures;

create social and political unrest.

Thus, even countries geographically distant from Iran may suffer serious consequences.

Impact on India

India is particularly exposed because it imports most of its crude oil and depends substantially on Gulf energy routes. Any sustained increase in oil prices raises India’s import bill and demand for US dollars.

The major consequences would be:

Rupee pressure: Rising demand for dollars to pay for oil imports can weaken the rupee. The RBI has already intervened to limit excessive currency depreciation. 

Higher inflation: Petrol, diesel, LPG, transport, fertilisers and manufactured products become more expensive.

Wider current-account deficit: India must spend more foreign exchange for the same quantity of imported energy.

Pressure on government finances: The government may reduce fuel taxes or increase subsidies to protect consumers, weakening fiscal targets.

Slower growth: Consumer purchasing power falls, business input costs increase and the RBI has less room to reduce interest rates.

Risks to Indian citizens and remittances: A wider regional war could threaten employment, safety and evacuation routes for Indians living in Gulf countries.

Recent estimates cited by Reuters suggested that prolonged conflict could reduce India’s growth towards approximately 6.6%, raise average inflation and place pressure on the fiscal deficit, although actual outcomes will depend primarily on oil prices and the duration of shipping disruption. 

India nevertheless has some protective strengths: diversified crude suppliers, strategic petroleum reserves, significant foreign-exchange reserves, growing renewable-energy capacity and strong diplomatic relationships with both Western and Middle Eastern countries.

Countries and sectors that may benefit

Some economic gains would occur, although they would be uneven.

Oil and gas exporters outside the disrupted region—such as the United States, Brazil, Canada, Norway and some African producers—may receive higher revenues. Defence companies, cybersecurity firms, tanker operators and selected energy businesses could also benefit.

However, even oil exporters may eventually suffer if excessively high prices trigger global recession and reduce demand.

Overall assessment

The greatest danger is not necessarily an immediate world war. It is a prolonged cycle of controlled but repeated escalation that keeps energy routes partially disrupted, oil prices elevated and businesses uncertain.

A ceasefire and reliable reopening of Hormuz would permit the global economy to recover gradually. A prolonged conflict would keep inflation high and growth weak. A regional war involving several energy-producing states or simultaneous disruption of Hormuz and the Red Sea could produce the most serious commodity shock since the 1970s.

The global economy has so far shown greater resilience than initially expected, supported by alternative production, inventories, renewable energy and relatively strong activity in large economies. Nevertheless, that resilience has limits. The decisive variables will be the duration of the conflict, the security of Hormuz, damage to energy infrastructure and whether the United States and Iran retain a functioning diplomatic channel. 

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