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European Energy Markets
31JUL

Bruegel resolves refill bill at EUR 26bn

4 min read
09:44UTC

Bruegel published a three-scenario refill model on Thursday 23 April: EUR 26 billion at TTF EUR 45/MWh, EUR 35bn at EUR 60/MWh, EUR 44bn at EUR 75/MWh. With TTF settling at EUR 44.86 on 25 April, the operative number is the lower one.

EconomicDeveloping
Key takeaway

At TTF EUR 44.86, the operative refill cost is EUR 26bn; the EUR 35bn anchor is EUR 60/MWh territory.

Bruegel, the Brussels economic policy think tank, published a three-scenario refill model on Thursday 23 April: EUR 26 billion at EUR 45/MWh TTF, EUR 35 billion at EUR 60/MWh, and EUR 44 billion at EUR 75/MWh 1. With TTF settling at EUR 44.86/MWh on 25 April , the operative number is EUR 26 billion, EUR 9 billion below the figure that has anchored EU policy debate since update #288 .

This matters because the EUR 35 billion figure has been quoted in finance-minister letters and in the consumer-relief framing of The Commission's AccelerateEU package, which was published on 22 April with no storage injection mechanism. At today's TTF print, AccelerateEU's gap looks smaller than its critics costed it; desks short summer and long winter against an EUR 60/MWh case have been pricing roughly EUR 9 billion of phantom buyer demand.

Bruegel itself stops short of endorsing the package. The same paper recommends against price caps, windfall instruments, and ETS (the EU Emissions Trading System, the bloc's carbon market) weakening, and flags Spain's drop in gas-price-setting hours from 75% in 2019 to 15% in 2026 as evidence that demand-side adjustment is doing the work caps would distort. Bruegel also notes Qatar supplies only 4% of total EU gas imports and 8% of LNG imports, lower than commonly cited; US LNG carries two-thirds of EU LNG flow.

Spain's drop from 75% to 15% gas-set hours is what Bruegel uses to argue the policy position. When fewer than one in six Iberian power-market clearing intervals are set by gas, the marginal price-formation mechanism for EU electricity has migrated towards renewables and storage. A price cap on gas in 2026 hits a smaller fraction of European power-market hours than it would have in 2022. The EUR 26 billion case sits inside that picture; the EUR 35 billion case requires either a Hammerfest LNG overrun beyond 10 July or a renewed Hormuz escalation to land.

Deep Analysis

In plain English

Bruegel is a Brussels-based economics research institute whose analysis informs EU policymakers. On 23 April it published a three-scenario estimate for how much it will cost the EU to fill its gas storage from current levels to the target level by November 2026. The three scenarios depend on where gas prices go: EUR 26 billion if prices stay around EUR 45 per megawatt-hour (where they are now), EUR 35 billion if prices rise to EUR 60, and EUR 44 billion at EUR 75. Importantly, the EUR 35bn figure that has been widely cited in EU policy discussions was never Bruegel's base case, it was the middle scenario, which assumes prices significantly higher than today's.

Deep Analysis
Root Causes

The EUR 35bn anchor that dominated EU policy debate originated from Bruegel's initial modelling at EUR 60/MWh TTF, which was the forward curve midpoint in late March 2026 when AccelerateEU was being drafted. Commission officials anchored their refill cost framing to the middle scenario rather than the spot-price-at-time-of-calculation scenario, creating a policy cost estimate that was already EUR 9bn above the operative number by 25 April.

The underlying structural cause is that EU energy policy operates on a 2-3 month legislative cycle while commodity markets price continuously. Models frozen at a forward curve midpoint diverge from actual cost as prices move.

What could happen next?
  • Consequence

    Commission officials and finance ministers working from the EUR 35bn anchor are overstating refill costs by EUR 9bn at current TTF, which may lead to unnecessarily restrictive demand measures if the policy frame is not updated.

  • Precedent

    Bruegel's explicit recommendation against price caps, supported by the Spanish gas-price-setting hours data, strengthens the analytical case against the five-finance-minister windfall levy letter and sets a benchmark for Madrid Forum discussions.

First Reported In

Update #5 · Ban day muted; Germany doubles injection rate

Bruegel· 26 Apr 2026
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Different Perspectives
Spain's LNG terminal operators
Spain's LNG terminal operators
Spain's 9,145 GWh terminal inventory is the largest single stock in the EU LNG network, an option value that can reroute cargoes wherever the winter strip pays best rather than a cavern gas obligation tied to a fixed date. That flexibility matters more as Germany's cavern shortfall pushes more of the winter security question onto import infrastructure.
European Commission
European Commission
Brussels holds the bloc to 90% on a flexible window while Germany, holding roughly a quarter of EU storage capacity, tracks toward missing its own lower 80% figure by 21 points. A national shortfall this size in the anchor market matters more to bloc security than the flexible timetable alone can absorb.
French power exporters and CRE
French power exporters and CRE
French day-ahead rose in step with Germany but by less, reopening a EUR 7-17 premium that makes northward export flows commercially attractive again after the EUR 43.09 discount evaporated in days. CRE separately authorised RTE and Enedis to buy flexibility locally, betting the coming winter's binding constraint is grid congestion rather than a shortage of firm capacity.
TTF trading desk
TTF trading desk
A visible national shortfall like Germany's 21-point gap is a directional signal, not noise, for a desk holding the summer-winter spread. TTF's flat EUR 58-60 range through this week's German price swings says the market has not yet chosen to reprice refill risk into the front of the curve.
German cavern and CCGT operators
German cavern and CCGT operators
German caverns kept buying prompt gas at TTF near EUR 58-60 through the inversion; the wind collapse to 2.4 GW then flipped the spark spread to plus EUR 29 and put turbines back in the same queue. Every day turbines win that bid, injection at a third of the 877 GWh/day pace needed falls further behind.
Slovakia
Slovakia
Slovakia says it dropped its hold-out on the 21st sanctions package only after Ursula von der Leyen personally signed written gas-price and supply guarantees. The Council of the European Union's own 17,238-character release on the package names neither Slovakia nor any guarantee, leaving Bratislava's account unconfirmed by the institutional record.