Strait of Hormuz: What Closure Would Cost UK SMEs in Energy Bills

One waterway controls 20% of the world’s energy. Your gas bill is downstream of it.

Twenty percent of the world’s liquefied natural gas passes through a 33-kilometre-wide channel between Iran and Oman. The Strait of Hormuz is the single most consequential chokepoint in global energy markets — and most UK business owners have never thought about it until their renewal quote arrives 40% higher than expected.

This isn’t a geopolitical thought experiment. It’s a live commercial risk that directly affects what you pay per unit of gas and electricity. Understanding it doesn’t require a degree in international relations. It requires understanding where your energy comes from and what happens when that supply route is threatened.

The numbers behind the risk

The Strait of Hormuz handles approximately 20–21 million barrels of oil per day and around 20% of global LNG trade. Key suppliers routing through the strait include Qatar — the world’s largest LNG exporter and a critical source of gas for European markets — alongside UAE and Kuwait.

In 2019, tanker attacks in the Gulf of Oman caused UK wholesale gas prices to spike 8–12% within 48 hours, despite no physical supply disruption occurring. That was a threat signal. A genuine closure — even temporary — would be categorically different.

Independent energy analysts modelling a 30-day strait closure project UK wholesale gas prices rising 40–60% within the first two weeks, as European storage draw-down accelerates and spot LNG cargoes divert or disappear from the market. Electricity prices track gas in the UK because gas-fired generation sets the marginal price on the wholesale market on the majority of trading days.

For a UK SME spending £60,000 per year on energy, a 50% wholesale price spike translates to a potential uplift of £18,000–£24,000 on the next contract — if they’re on a fixed deal that’s due for renewal, or immediately if they’re out-of-contract on pass-through pricing.

Why the UK is more exposed than most business owners realise

The UK was once largely insulated from Middle Eastern gas price shocks because domestic North Sea production supplied the majority of demand. That era is over.

UK domestic gas production has declined by more than 60% since its 2000 peak. The UK now imports approximately 50–55% of its gas, with pipeline imports from Norway accounting for the largest share, supplemented by LNG imports — predominantly from Qatar and the United States.

The Qatar dependency is the critical variable. Qatar’s Ras Laffan terminal is the world’s largest LNG export facility, and virtually all of its output transits the Strait of Hormuz. When European buyers — particularly Germany, France, and the UK — reduced Russian pipeline gas imports following the 2022 invasion of Ukraine, they replaced a significant portion with Qatari LNG. That substitution increased the UK’s indirect exposure to Hormuz risk.

Norway covers the pipeline gap, but Norway cannot be scaled overnight to replace LNG volumes. There are physical limits to what the interconnector infrastructure can carry.

What this means for your energy contract decision right now

There are two scenarios where a Hormuz escalation directly costs your business money:

Scenario one: You’re out of contract or approaching renewal during a crisis. Suppliers price contracts using forward curves. When geopolitical risk spikes, forward curves spike. If your contract expires in the next 3–6 months and a Gulf incident occurs before you fix, you are locking in at crisis pricing. This is the most common and most avoidable form of energy overpayment we see.

Scenario two: You’re on a pass-through or flexible contract. If your contract passes wholesale cost changes through to you in real time, a Hormuz escalation hits your invoice within the billing cycle. Some businesses choose this structure deliberately for the upside — but they carry the downside too.

The businesses that fare best through geopolitical energy shocks are those already on fixed-price contracts with 12–24 months remaining when the event occurs. Not because they predicted the crisis — because they managed their renewal timing properly.

The Telnergy position on geopolitical risk

We do not offer crystal-ball predictions on Gulf politics. What we do offer is contract structure advice that accounts for the risk premium already embedded in forward markets and the asymmetric downside of being unhedged when a supply shock occurs.

In the current environment — elevated Middle Eastern tension, reduced European storage headroom, declining North Sea output — we are recommending that most SME clients on standard consumption profiles fix their contracts 4–6 months ahead of expiry rather than waiting for “better prices.” The cost of waiting, if a Hormuz incident occurs in the window, is typically far greater than any marginal saving achievable by timing the market.

Practical steps for SME owners

• Check your contract end date today. If it’s within 6 months, you should already be in the market.
• Identify whether you’re on fixed or pass-through pricing. Your bill structure determines your exposure.
• Ask your broker what assumptions they’re making about Middle Eastern supply risk. If they can’t answer, that tells you something.
• Consider contract length carefully. A longer fixed deal reduces renewal frequency and therefore the number of times you’re exposed to a crisis-timing risk.

The Strait of Hormuz won’t appear on your energy bill as a line item. But it’s priced into every forward contract being quoted to UK businesses right now. Understanding that helps you make better decisions about when and how to fix.

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