The link between oil and food prices

When you look at the ingredients list on any item of food on a supermarket shelf, there is one essential input you will not find: crude oil. Yet in the complex machinery of the global economy, few systems are as tightly interlinked as the energy and agricultural sectors.

Following the US‑Israeli airstrikes on Iran, the global economy has been forced to contend with a new bout of energy volatility. The repercussions will not remain confined to the Middle East. Since modern food systems are built on carbon‑based energy, the impact of higher oil prices will ultimately show up on dinner tables around the world.

Modern agriculture is, at its core, a process of converting fossil fuels into calories. Every stage of the farming cycle is energy intensive:

• Machinery – from soil preparation to harvesting, tractors and combines burn large quantities of diesel. When the cost of “off‑road” diesel rises, the cost of planting an acre of wheat or maize increases immediately.
• Irrigation – in many regions, water must be pumped from aquifers or transported through large canal systems powered by diesel engines or electricity generated from natural gas or oil.
• Processing – once crops leave the field, they must be cleaned, milled or pasteurised. These industrial facilities are heavy energy consumers, and rising oil and gas prices quickly push up their overhead costs, which in turn are passed along the supply chain.

According to the International Energy Agency, energy can account for as much as 50% of variable production costs in developed agricultural economies. A sharp rise in fuel costs can therefore erase profit margins unless farmers raise prices. But fuel affects food inflation through another, even more important channel: fertiliser.

The fertiliser connection

The global food system depends heavily on synthetic fertilisers, particularly nitrogen‑based products. Ammonia – the foundation of nitrogen fertiliser – is produced using the Haber–Bosch process, which relies on natural gas as both feedstock and energy source. This makes fertiliser production tightly correlated with oil and gas markets.

The supply of other inputs such as phosphate and potash is also energy intensive. Extraction relies on heavy machinery, and long‑distance transport depends on global shipping that runs on oil‑derived bunker fuel. Since the recent attacks on Iran, fertiliser production costs have climbed sharply, driven by both higher fuel prices and increased shipping costs.

When fertiliser becomes expensive, two outcomes follow:

• Farmers apply less, reducing yields and tightening food supplies.
• Farmers pay more, forcing higher prices for the eventual harvest.

In both cases, the cost of producing a unit of crops rises, feeding directly into global food prices.

The logistics of food

Food is rarely eaten in the place where it is grown. The global food supply chain relies on a vast transport network, from container ships burning bunker fuel to refrigerated lorries that consume diesel not just for movement but also for cooling. Even food packaging is heavily dependent on petrochemicals.

When oil prices remain elevated, the cost of moving a crate of tomatoes from a farm in Spain to a supermarket in Manchester rises sharply. This “transportation tax” becomes one of the most visible drivers of food inflation at the checkout.

One of the most frustrating features of energy‑driven food inflation is the lag between falling oil prices and falling food prices. Supply chains are inherently sticky. Farmers buy seed and fertiliser months in advance at high prices. Shippers often lock in long‑term fuel contracts. Retailers may be slow to reduce prices once consumers have become accustomed to paying more.

Because food is a frequent, non‑discretionary purchase, rising grocery bills also feed inflationary expectations. When households anticipate further price rises, inflation becomes self‑reinforcing.

The road ahead

The food inflation experienced in 2026 is a stark reminder that global food security rests on a foundation of stable and affordable energy. As long as food production, fertiliser manufacturing, and the transportation of crops rely on fossil fuels, global food prices will remain vulnerable to geopolitical shocks in oil‑producing regions.

Addressing food inflation is not only a matter of agricultural policy – it is fundamentally a question of energy resilience. Until the world succeeds in decoupling calories from carbon through renewable‑powered farming, green fertilisers, and more-efficient logistics, the price of our weekly shop will continue to be set, in large part, by events far beyond our fields and supermarkets. They will be determined by events in the Middle East.