The Strait of Hormuz Risk Premium: What It Adds to Every UK Energy Contract

The Strait of Hormuz risk premium is already priced into your next energy contract. Here’s what it is, how much it adds, and why it won’t go away.

Forward energy markets are not pure forecasts of future prices. They incorporate risk premiums — additional cost above the expected equilibrium price — that compensate suppliers for the possibility that adverse events will make energy more expensive than the base case suggests. The Strait of Hormuz risk premium is one of the most significant and most persistent of these premiums in the current market.

This is the fourth article in Telnergy’s geopolitical energy series. The first article covered what a Hormuz closure would cost UK SMEs directly. This article covers how the risk is already embedded in contracts being quoted today — before any closure occurs — and what that means for procurement decisions.

How risk premiums work in energy forward markets

When a supplier quotes you a fixed-price energy contract, they purchase forward contracts on the wholesale market to hedge the price they’ve committed to. The forward price they pay reflects not just the expected future price of energy, but also the uncertainty around that expectation. In a world of zero uncertainty, the forward price would equal the expected future spot price. In the real world, forward prices include risk premiums that compensate for carrying price uncertainty. The premium is larger when uncertainty is higher.

The Strait of Hormuz represents one of the most clearly defined and persistently elevated sources of supply uncertainty in the global gas market. Twenty percent of global LNG passes through a 33-kilometre waterway bordered by Iran. The UK’s structural dependence on LNG — post-Russian gas withdrawal — means that Hormuz risk is now directly embedded in UK gas supply security. The market prices this, appearing in the forward curve and therefore in every contract being quoted to UK businesses today.

Quantifying the premium

In periods of elevated Hormuz tension — tanker incidents, Iranian threats, US-Iran diplomatic breakdowns — the gap between forward prices and what fundamental supply-demand models suggest widens measurably. In periods of relative calm, it narrows but doesn’t disappear. The Hormuz premium has been estimated at approximately 5–15% of the total forward price during elevated-tension periods, and 2–5% during lower-tension periods.

For a UK business securing a 12-month fixed electricity contract with a wholesale component of 12p/kWh, a 5% Hormuz risk premium represents approximately 0.6p/kWh embedded in the rate. On 500,000 kWh per year, that’s £3,000 per year in risk premium cost — paid regardless of whether a Hormuz incident actually occurs. This is not waste. It is the cost of insurance against a tail risk that, if it materialised without a premium being embedded, would produce a price spike far larger than the accumulated premium cost.

Why the premium is structural, not cyclical

The Hormuz premium has a structural floor that didn’t exist before 2022. UK LNG dependency is now structural — before the Russian supply crisis, Hormuz mattered to the UK primarily through its effect on global oil prices. Today, with UK LNG imports representing 25–30% of total gas supply — predominantly from Qatar, which routes through Hormuz — the UK has a direct physical exposure that didn’t previously apply. Geopolitical tension in the Gulf has also elevated baseline risk: the Iran nuclear programme, US-Iran relations, Houthi operations in the Red Sea, and proxy conflict activity in Yemen have collectively raised the baseline probability of a supply-disrupting incident. For the premium to fall to pre-2020 levels would require a comprehensive regional security improvement that is not currently in prospect.

The premium across contract types

Fixed-price all-inclusive contracts: The premium is embedded in your quoted unit rate. If a Hormuz incident occurs, your contracted rate is protected — you effectively receive the full value of the premium you paid. If nothing happens, the premium represents a cost without a matching event. This is the normal economics of insurance.

Pass-through contracts: The wholesale component is fixed, but if a Hormuz incident drives spot market spikes that feed through to variable cost elements, you absorb those impacts.

Out-of-contract or flexible contracts: You face the full spot market at the moment of purchase. A Hormuz spike immediately and fully impacts your cost.

Contract timing and the premium

Periods of de-escalation — diplomatic progress, reduction in tanker incidents, US-Iran talks — compress the premium. Periods of escalation expand it. Businesses that renew during a compression window lock in lower premiums; those that renew during an escalation window pay the peak. Maintaining adequate lead time before contract renewal creates the option to time execution against premium compression rather than being forced to renew at whatever the market offers on the day the contract expires.

The Hormuz risk premium in UK energy markets will not structurally reduce until UK LNG dependency is reduced through domestic production maintenance or renewable substitution, or the geopolitical situation in the Gulf stabilises to a degree that the risk of a supply-disrupting incident falls to historically normal levels. Neither is imminent. In the interim, the premium is a permanent component of UK business energy costs — a geopolitical tax on LNG dependency that UK businesses pay whether they know about it or not.

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