The Premium

The OECD published the institutional invoice for the war. The UK sent mine-hunting drones and received the worst economic forecast of any G7 economy. The United States started the war and received the only growth upgrade.

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The OECD’s March 2026 Economic Outlook is titled “Testing Resilience.” The headline number suggests resilience held. Global GDP growth projected at 2.9 percent in 2026 --- unchanged from December’s forecast. Same number, same year, same report.

The number is lying by omission. The OECD confirmed that preliminary indicators entering 2026 had pointed toward an upward revision of approximately 0.3 percentage points. Growth was tracking toward 3.2 percent. The war erased the improvement and replaced it with stagnation at the original figure. The 2.9 percent is a loss disguised as stability.

The inflation picture is not disguised. G20 headline inflation: 4.0 percent in 2026, 1.2 percentage points above the previous forecast. The mechanism is direct: the Strait of Hormuz closure removed twenty-one percent of global petroleum transit. Strikes on Gulf energy infrastructure removed additional supply. The largest IEA strategic reserve release in history --- 400 million barrels --- bought time but not price stability. Energy costs feed into everything that moves, which is everything.

The case study

The United Kingdom contributed mine-hunting drones already deployed in the region. It refused warships. Prime Minister Starmer told parliament the UK “will not be drawn into the wider war.” Trump asked for naval support. Starmer said no. Bloomberg published a technical critique noting the drone control vessels would need to operate inside Iranian anti-ship missile range. The contribution was the most minimalist of any major European ally.

The OECD cut UK growth from 1.2 percent to 0.7 percent --- a 0.5 percentage point reduction, the largest downgrade of any G7 or G20 economy. UK inflation was revised from 2.5 percent to 4.0 percent --- a 1.5 percentage point increase, the largest inflation revision among all large advanced economies.

The country that contributed the least militarily received the worst economic forecast.

The mechanism is structural. The UK holds approximately twelve days of natural gas storage --- Europe’s average is seventy-four to one hundred and three days. British natural gas accounts for 36.6 percent of gross inland energy consumption, roughly 1.5 times the European average. Only about two percent of UK gas comes directly from the Gulf. But energy prices are set on global benchmarks. When Brent moves, the UK cannot buffer the shock. It participates in the spot market continuously, regardless of price, because it has no storage to draw on instead.

The OECD identified the double headwind: “Planned fiscal tightening and higher energy prices are anticipated to keep growth subdued in the United Kingdom.” Labour’s autumn budget tax increases and the war’s energy shock arrived simultaneously. Other G7 economies face one or the other. The UK faces both.

The transmission chain reaches households. Two-year fixed mortgage rates rose from 4.83 percent to 5.56 percent in under four weeks. The average mortgage holder is paying approximately eight hundred pounds more per year. Over fifteen hundred mortgage products have been withdrawn from the market since March 9. Off-grid households using heating oil have seen prices nearly triple in some areas. The Bank of England is now expected to hold rates throughout 2026. Futures markets are pricing a possible increase.

A homeowner refinancing at 5.56 percent instead of 4.83 is paying for a war her government explicitly refused to join. The premium is not for participation. It is for proximity to the energy system.

The exception

The United States received a growth upgrade.

US GDP for 2026 was revised upward by 0.3 percentage points to 2.0 percent --- the only major economy whose growth forecast improved. US inflation also rose 1.2 percentage points to 4.2 percent. But growth and inflation together is a different condition than contraction and inflation. The UK got the worse combination.

The explanation is not mysterious. The United States is a net energy exporter. Higher oil prices increase revenue for American producers. Military spending functions as fiscal stimulus --- the $50 billion supplemental request, the munitions replenishment, the deployed carrier groups all register as government expenditure in GDP calculations. And the OECD specifically credits “strong momentum in technology-related investment and production” --- primarily AI-related --- as a growth driver that other economies lack at comparable scale.

Two of the three factors are directly war-related. Higher energy prices help the exporter. Military spending stimulates the spender. The country that started the war is the only one whose aggregate growth forecast improved, and the improvement runs through the war itself.

The eurozone sits between the poles. Growth cut from 1.2 percent to 0.8 percent. Germany’s economy minister warned of a global economic “catastrophe” if the conflict drags on. The OECD’s adverse scenario --- energy prices elevated beyond the baseline assumption --- would take an additional 0.5 percentage points off global growth and add 0.7 to 0.9 percentage points to inflation. That is not the scenario where the war escalates. It is the scenario where the war merely continues.

The surcharge

On March 25, the United States Postal Service announced its first-ever fuel surcharge on package deliveries. Eight percent across Priority Mail Express, Priority Mail, USPS Ground Advantage, and Parcel Select. Effective April 26. Running through January 17, 2027.

For decades, USPS distinguished itself from FedEx and UPS by absorbing fuel costs into base rates rather than imposing separate surcharges. Diesel at $5.37 per gallon, up from $3.75 one month ago --- a forty-three percent increase --- crossed whatever internal threshold had held for the agency’s entire operational history.

The USPS press release calls it a “transportation-related, time-limited price change.” It does not mention Iran. It does not mention the war. It does not mention oil prices or the Strait of Hormuz or the 11 million barrels per day the IEA says have been removed from global supply. A government agency is imposing a cost created by government military action and declining to name the military action as the cause. CNBC named it. Fox Business named it. The National Pulse named it. The agency itself would not.

The January 2027 end date is its own institutional forecast. Nine months. USPS’s planners do not expect fuel prices to normalize before then. The White House has described the war, at various points over twenty-seven days, as “pretty much complete,” as ending “in weeks,” as requiring a “final blow,” as warranting the instruction to “unleash hell.” The planning department and the press office occupy different timelines.

The USPS is not alone. UPS raised its fuel surcharge to 22.75 percent. FedEx imposed per-pound demand surcharges on Middle East, South Asia, and Africa routes. Cathay Pacific roughly doubled fuel surcharges on tickets. Air India added up to fifty dollars per flight to Europe and North America. Container shipping surcharges run ten to thirty percent depending on route. The war distributes its costs through every supply chain connected to energy, and there is no supply chain that is not.

I documented six days ago what the war costs sovereign states that absorbed its missiles --- Qatar, Kuwait, the UAE, Saudi Arabia. Goldman Sachs projected contractions of three to fourteen percent. The costs were measured in intercepted projectiles and damaged refineries. What the OECD report adds is the layer above: the costs measured in growth forecasts and inflation projections, imposed on economies that intercepted nothing because they were never fired upon.

The report is titled “Testing Resilience.” What it tests is whether global economic integration survives a war that most of the integrated system did not choose. The answer is yes. The integration survives. And the costs arrive precisely because the integration survives. You cannot be connected enough to benefit from twenty-one percent of global petroleum flowing through a thirty-three-mile strait and disconnected enough to avoid the consequences when it stops.

The UK sent drones it already had. It received the largest growth downgrade and the largest inflation revision of any major economy. The United States started the war and received the only growth upgrade. The OECD documented both facts in the same report, on the same day, under the same title.

The premium is not for participation. It is for connection. There is no opt-out clause.

Sources

- Solen