Europe Faces Its Gas Refill Deadline From the Thinnest Base in Nine Years
The European Union enters the final stretch of its gas refill season from the thinnest base in nine years, and the arithmetic of the deadline matters more than the identity of any single supplier.
The Agency for the Cooperation of Energy Regulators, in “Key developments in European gas wholesale markets” covering the 2025-2026 gas winter season and published on 23 April 2026, records European Union gas stocks as near nine-year lows, falling below 30 percent.
Supply concentration is the first thing readers reach for when a refill season looks tight, and the shares are worth stating precisely, because they are smaller than the attention they attract. The same ACER document puts Qatar at about 7 percent of European Union liquefied natural gas imports, and because liquefied natural gas is about half of all European Union gas imports, that is equivalent to 3.5 percent of total natural gas imports.
That figure is about gas actually delivered. A second, larger figure is about gas contracted, and the two must not be merged. ACER puts European Union contracted volumes with Qatar for calendar 2026 at about 21.5 billion cubic metres, equal to 6.3 percent of 2025 European Union gas demand. On our calculation that implies annual demand of about 341 billion cubic metres. Contracted is not delivered, and the gap between 3.5 percent of imports and 6.3 percent of demand is the difference between the two questions, not a discrepancy.
European Union gas import shares, per ACER. The final column is our calculation.
| Source | Share of LNG imports | Share of all gas imports | Implied by pipeline |
|---|---|---|---|
| United States | More than 60 percent | More than 30 percent | – |
| Russia | 15 percent | 14 percent | About 6.5 percentage points |
| Qatar | About 7 percent | 3.5 percent | – |
These shares are internally consistent, which is the reason to rely on them. If liquefied natural gas is half of imports and the United States is more than 60 percent of liquefied natural gas, the United States is more than 30 percent of all gas imports, which is what ACER separately states. Russia at 15 percent of liquefied natural gas is 7.5 percent of all imports, against 14 percent of imports in total, so roughly 6.5 percentage points of Russian gas still arrives by pipeline.
The refill target is the other half of the problem. Gas Infrastructure Europe, in a release dated 9 April 2026, put stocks at the start of the injection season at 314 terawatt hours, or 29 billion cubic metres, against total European Union storage capacity of 1,131 terawatt hours. On our calculation those figures imply 10.83 terawatt hours per billion cubic metres and therefore total capacity of about 104 billion cubic metres. A second route agrees: the European Commission’s figure of 83 percent full and about 85 billion cubic metres on 1 October 2025 implies about 102 billion. So an 80 percent target is about 82 to 84 billion cubic metres and a 90 percent target about 92 to 94 billion.
The International Energy Agency, in its Gas Market Report for the third quarter of 2026, states that reaching 80 percent will require about 7 billion cubic metres, or 26 percent, more injections than in the equivalent period of 2025.
Prices reflect the arithmetic rather than a panic. Front-month TTF has traded near 16 dollars per million British thermal units, which on our calculation is about 54.6 dollars per megawatt hour at 3.412 million British thermal units to the megawatt hour.
Why it matters: The instinct when a refill season looks tight is to reach for the share of supply a given exporter represents, and on ACER’s own numbers those shares are modest: about 3.5 percent of imports for Qatar and 14 percent for Russia. The exposure is not in the average, it is in the timing. Europe has to add roughly a quarter more gas than it added last year, from a lower starting point, inside a fixed season, and every cargo that does not arrive in August or September has to be replaced by one that costs more in October. A small supply share can be an immaterial number in an annual balance and a decisive one in a nine-week injection window.
Looking ahead: The measure to watch is the weekly injection rate against the rate required to reach 80 percent by the deadline, rather than the storage percentage itself. Replacement cargo pricing for October and November delivery is the clearest read on whether the market believes the target will be met.
Sources: Agency for the Cooperation of Energy Regulators; Gas Infrastructure Europe; European Commission; International Energy Agency.
