US tightens Iran sanctions: Why Africa should worry about oil, fuel prices and inflation

WASHINGTON — The United States is preparing to dramatically expand economic pressure on Iran, threatening countries and companies that continue doing business with Tehran with tougher sanctions that could further disrupt global oil supplies.

US Treasury Secretary Scott Bessent is expected to announce the expanded measures on Monday as the Trump administration seeks to squeeze Iran financially after months of conflict and stalled negotiations. The measures are expected to broaden so-called secondary sanctions, which can target companies and countries that continue trading with Iran even when they are not directly under US jurisdiction.

For Africa, the biggest question is not simply what happens to Iran.

It is what happens to the price of oil—and therefore the price of almost everything that depends on fuel and transport.

Why the Iran crisis matters to Africa

The Strait of Hormuz is one of the world's most important energy routes.

Before the current disruption, the waterway carried roughly a fifth of global oil supplies. Traffic has fallen sharply as the conflict and uncertainty have affected shipping through the route.

That makes any further disruption a potential problem for countries that depend on imported petroleum.

And many African economies do.

When crude oil becomes more expensive, the effect does not stop at petrol stations.

Fuel is needed to move food from farms to markets, transport goods between cities, power businesses and operate machinery.

Higher fuel costs can therefore feed into transport fares, food prices, electricity costs and the prices of imported goods.

For households already dealing with high living costs, that can quickly become a serious problem.

Oil prices are already responding

Oil markets have been volatile as traders assess the possibility of tighter Iranian exports.

Brent crude rose by more than 5 per cent last week, its second consecutive weekly gain, as negotiations between the US and Iran stalled and shipments through the Strait of Hormuz remained constrained. On Monday, prices fell by more than $1 as investors took profits while waiting for details of the new US sanctions.

Brent was trading around the low-$90s per barrel on Monday, while US West Texas Intermediate crude was in the mid-$80s.

The important point for African consumers is that a temporary fall in oil prices does not necessarily mean the risk has disappeared.

Markets are looking ahead to whether the new sanctions will further restrict Iranian exports and whether Iran or other countries respond in ways that disrupt shipping.

The China problem

One of Washington's biggest challenges is China.

China has been the largest buyer of Iranian oil for years, making Chinese companies particularly important to the sanctions strategy. Reuters reported that more than 80 per cent of Iran's shipped oil goes to China, according to Kpler data.

The US is therefore putting pressure on Iran's trading partners as part of its attempt to isolate Tehran.

That creates a delicate situation.

If Chinese companies continue buying Iranian oil, Washington could impose sanctions on entities involved in the trade.

If China significantly reduces those purchases, Iran could lose an important source of revenue and global oil supply could be affected in another way.

Either scenario could have consequences for global energy markets.

What does this mean for Kenya?

Kenya is a useful example of why African consumers should pay attention.

Kenya's annual inflation reached 6.5 per cent in July 2026, according to the Kenya National Bureau of Statistics.

But some of the costs facing households were rising much faster.

Transport prices increased 15.6 per cent over the year, while food and non-alcoholic beverages rose 9.0 per cent.

That means another major increase in global energy costs could arrive at a particularly sensitive time for Kenyan households.

Higher fuel prices can increase the cost of public transport and private travel.

They can also raise the cost of moving food from farms to markets and goods from ports and factories to shops.

The result can be a second-round inflation effect: fuel becomes more expensive, transport costs rise, businesses face higher operating costs and consumers eventually pay more.

Kenya is not alone.

Similar pressure could emerge in other African countries that rely heavily on imported petroleum.

Why fuel prices can affect food

Consider a simple supply chain.

A farmer produces vegetables.

The vegetables need to be transported to a market.

A trader buys them and transports them to another town.

A supermarket or market vendor sells them to consumers.

At almost every stage, fuel can be involved.

If diesel prices rise sharply, the cost of operating trucks increases.

The transport company then has to recover that cost.

The trader faces a higher delivery bill.

The retailer may eventually increase the price paid by consumers.

That is why an oil shock can become a food-price shock even when there has been no shortage of food.

Africa could also face a currency problem

Oil is generally traded internationally in US dollars.

That creates an additional vulnerability for countries whose currencies weaken against the dollar.

If the dollar price of oil rises at the same time as a local currency loses value, importers can face an even larger increase in the domestic cost of petroleum.

Governments may then face difficult choices.

They can allow higher fuel prices to pass through to consumers, potentially worsening inflation.

They can subsidise fuel, which protects consumers in the short term but puts pressure on public finances.

Or they can try to absorb some of the cost elsewhere in the economy.

None of the choices is painless.

Could African oil producers benefit?

There is also a potential upside for Africa's oil-producing countries.

Higher international oil prices can increase export revenues for major producers such as Nigeria and Angola, assuming production and export volumes remain stable.

That can improve government revenues and foreign-exchange earnings.

But the benefits are not automatic.

Higher oil prices can simultaneously increase the cost of fuel for domestic consumers and businesses.

An oil-producing country can therefore benefit from higher export earnings while its households suffer from more expensive petrol and diesel.

The impact depends on how much of the country's production is exported, how fuel prices are regulated and how governments manage the additional revenue.

What about countries that do not import Iranian oil?

This is where global markets matter.

An African country does not need to buy Iranian crude directly to feel the consequences of an Iranian supply shock.

Oil is traded in a global market.

If supply becomes tighter, the international benchmark price can rise.

That higher benchmark can affect buyers around the world.

The same principle applies to shipping.

If vessels avoid dangerous routes or face higher insurance and freight costs, companies can pass some of those expenses on to customers.

Africa's distance from the Middle East therefore does not provide complete protection.

The sanctions could also widen the US-China confrontation

The Iran sanctions are not only about Washington and Tehran.

They could also test US relations with China.

China has rejected unilateral sanctions and has signalled that it will protect its interests, while the United States is considering measures that could affect Chinese financial institutions involved in Iranian trade.

That creates another potential source of uncertainty for the global economy.

A dispute over Iranian oil could become part of a much larger confrontation involving energy, banking, shipping and international trade.

For African countries, that matters because China and the United States are two of the continent's most important economic partners.

What happens next?

The immediate focus will be on the details of the new US sanctions and how countries such as China respond.

Markets will also watch the Strait of Hormuz.

If oil shipments through the waterway continue to recover, some of the pressure on energy markets could ease.

But if the confrontation leads to further restrictions on Iranian exports or a wider disruption to shipping, oil prices could rise again.

Reuters reported on Monday that Morgan Stanley expects Brent crude could reach $100 a barrel in the fourth quarter if the disruption persists.

For African households, that number matters less as a Wall Street forecast than as a warning about what could happen to the cost of fuel, transport and food.

The most important question is therefore not whether Iran is thousands of kilometres away from Africa.

It is whether the conflict turns into another global energy shock.

If it does, African consumers could feel the impact every time they fill a vehicle, pay a bus fare or buy food whose price depends on the cost of getting it to market.