Every day, one story that matters, broken down into three numbered scenarios, each with its own probability. Never fixed — it shifts as the situation changes.
Scénario
Wednesday, French current affairs
Electricity: Will the End of ARENH Send Your Bill Soaring?
Publié le 16 septembre 2026
Share:
The question at hand
Since the end of ARENH, does the Universal Nuclear Payment really protect 30 million households from rising prices?
The facts
For fifteen years, a mechanism called ARENH forced EDF to sell part of its nuclear output to rival suppliers at a fixed price of €42/MWh, who then resold it to households. This system, created by the 2010 NOME law, was meant to let all French consumers benefit from the low prices of nuclear energy, produced by a fleet that had been collectively financed for decades. But this rate had not been revised in ten years, which created a problem for EDF: the company sometimes had to sell at a loss, unable to cover the maintenance and investment costs of its aging power plants.
On December 31, 2025, ARENH came to an end, as had been planned since the scheme's inception. Since January 1, 2026, EDF has been selling all its nuclear electricity directly on the wholesale market, at a price set by supply and demand, like any other energy producer in Europe. This shift is worrying, because market prices sometimes climb well above the old regulated rate: on the day-ahead market, they were already above €80/MWh at the end of December 2025, and the spot price reached €178.3/MWh on September 16, 2026. Without a safeguard, this shift could turn every market swing into a direct swing in the bill.
To prevent this shift from penalizing households, the government created a new mechanism: the Universal Nuclear Payment* (VNU), adopted as part of the 2025 budget. The idea: if the revenue EDF earns from selling its nuclear power exceeds a level deemed excessive, part of that surplus must be paid back to consumers as a discount on their bill. It is a complete reversal of logic: before, the state set a price in advance; now, it checks after the fact whether EDF made too much money, and only redistributes in that specific case.
The VNU is based on two precise thresholds calculated by the CRE, the energy regulator. If EDF's average revenue exceeds €78/MWh, half of the surplus is paid back to customers; beyond €110/MWh, 90% of the difference must be returned. Nine months after it took effect, this mechanism has still never been triggered: the CRE estimates EDF's actual nuclear revenue for 2026 at around €66/MWh, well below the first threshold. No "VNU" line has therefore appeared on bills this year, which is not a malfunction of the system but simply how it works normally when prices stay moderate.
Understanding it
The VNU works like a two-notch thermostat: nothing kicks in before a certain heat threshold.
Picture a thermostat set to switch on only above a certain temperature. Below €78/MWh, nothing happens: it's the "normal" zone, even if the price has risen compared with the old ARENH rate. Between €78 and €110/MWh, the thermostat starts acting moderately, paying back half the surplus. Beyond €110/MWh, it runs at full power, at 90%. In 2026, the thermometer reads around €66/MWh: the thermostat stays off, which explains why the VNU is absent from bills.
Meanwhile, the regulated tariff — which still covers more than 20 million households — has continued to change for other reasons, unrelated to ARENH or the VNU. In September 2026, it stands at €0.2001/kWh including tax under the Base option, after a 2.5% increase on August 1 linked to the revision of the electricity grid fee (TURPE) and a new capacity mechanism. The CRE has even announced, for February 2027, a new deadline with an additional catch-up adjustment already capped at 3% in 2026 but not yet fully settled, leaving uncertainty about the exact size of the next bill.
It is precisely this uncertainty that makes the topic ripe for several distinct scenarios. The Ministry of the Economy promises price stability "at least in 2026 and 2027," banking on low market prices and on the fact that 2023, marked by a price spike, is gradually dropping out of the regulated tariff calculation. Conversely, a study by UFC-Que Choisir published in February 2026 pointed to a potential bill increase of up to 19%, or nearly €250 a year for an average household, with VNU redistribution seen as too limited to offset it. Between these two readings, everything hinges on how wholesale nuclear prices evolve in the coming months — hence the value of distinguishing a favorable trajectory, a trajectory of gradual increases, and a more abrupt shock scenario.
Regulated tariff (Base option, 6 kVA)€0.2001/kWh incl. tax +2.5% since August 1, 2026
VNU trigger threshold€78/MWh (estimated revenue ~€66/MWh) not reached in 2026, no redistribution
Favorable, stable, or degraded
Fin de l'ARENH : le VNU va-t-il vraiment protéger ta facture d'électricité ?
What we're assessing
FavorableLes prix de gros restent modérés et la facture des ménages se stabilise durablement.
StableLes hausses restent progressives, portées par le réseau et les taxes, sans choc visible.
DégradéUn choc sur les prix de gros fait grimper la facture sans redistribution suffisante du VNU.
Favorable
30%
Likely
Wholesale prices stay low, the bill stabilizes
In this scenario, wholesale electricity prices stay close to their current level, below the €78/MWh that would trigger the VNU. EDF continues to sell its output at market price without this translating into a price spike for households, because average nuclear revenue stays within a zone deemed reasonable by the CRE. The regulated tariff continues to evolve, but only for technical reasons such as the grid or taxes, unrelated to the end of ARENH itself. The Finance Ministry's promise of a stable bill in 2026 and 2027 is borne out in practice, which reassures the 20 million households still on the regulated tariff.
Compared with the stable scenario, the difference lies in the complete absence of pressure on wholesale prices: here, even the TURPE catch-up adjustment planned for February 2027 stays contained, with no painful "tab" left to settle. Compared with the deteriorated scenario, the gap is clear: no geopolitical shock or nuclear production mishap disrupts the balance. This is the scenario where the VNU, even inactive, still fulfills its implicit mission: it simply never needed to kick in, because the market never crossed the critical threshold.
Seuil de déclenchement du VNUrevenu ~60-65 €/MWh, seuil non atteint→~66 €/MWh, non atteint
The France angleA stable bill protects household purchasing power without straining EDF's finances. ↑ Rather favorable for France.
Stable
50%
Fairly likely
The bill climbs slowly, with no sudden shock
In this scenario, there is no spectacular spike, but an accumulation of small, regular increases. The regulated tariff keeps rising in steps, like the 2.5% already applied in August 2026, driven by the revision of the electricity grid fee (TURPE), the rollout of the capacity mechanism, and the catch-up adjustment expected in February 2027. EDF's nuclear revenue stays below the €78/MWh threshold that would trigger the VNU, at around €60.94/MWh according to the CRE's estimate for 2027, so no redistribution offsets these technical increases. The household never sees a single shock, but a trend that chips away at its budget month after month.
This scenario differs from the favorable one in the absence of true stability: even without a crisis, grid costs and new capacity obligations keep climbing, unlike a bill that would stay frozen. It differs from the deteriorated scenario in the absence of a sudden shock to wholesale nuclear prices: here, the increase is predictable and gradual, not abrupt or massive as UFC-Que Choisir fears. This is the middle-ground scenario, where the VNU remains a safety net that is never triggered, while other, less visible mechanisms do the work of pushing the bill up.
Seuil de déclenchement du VNUrevenu ~61-67 €/MWh, seuil non atteint→~66 €/MWh, non atteint
The France angleA continuous but discreet increase still weighs on purchasing power, without triggering any visible alarm. ↓ Rather unfavorable for France.
Degraded
20%
Unlikely
A wholesale price shock sends the bill soaring
In this scenario, an outside event — geopolitical tensions over energy supply, an incident at the nuclear fleet, a particularly harsh winter — causes wholesale electricity prices to spike, as during the 2022-2023 crisis. EDF's nuclear revenue then exceeds the €78/MWh threshold, or even the €110/MWh one, finally triggering the VNU. But the redistribution, calculated on only 50% then 90% of the surplus, isn't enough to fully offset the increase passed on to the regulated tariff. This is the scenario UFC-Que Choisir fears, having already pointed in February 2026 to a possible increase of up to 19%, or around €250 a year for an average household.
Unlike the stable scenario, the increase is no longer gradual but sudden and strongly felt, which changes how households perceive the shock. Unlike the favorable scenario, the VNU does indeed kick in here — but its activation actually proves its inadequacy: even when active, it never reimburses 100% of the surplus, leaving part of the increase for consumers to bear. This is the only scenario where the mechanism meant to protect bills is put to a real test, revealing its structural limits rather than its success.
Seuil de déclenchement du VNUrevenu > 78 €/MWh, VNU activé partiellement↑~66 €/MWh, non atteint
The France angleA price shock would make households pay a much heavier bill, despite the VNU safety net. ↓ Rather unfavorable for France.
Ordres de grandeur indicatifs pour les 3 scénarios ci-dessus, estimés avec l'information disponible à la publication et réévalués si la situation change — jamais des prévisions garanties. Learn more about our method →
Key takeaways
The question at hand: nine months after the end of ARENH, does the Universal Nuclear Payment really protect the 20 million households still on the regulated tariff from a surge in electricity prices?
Context: since January 1, 2026, EDF has been selling all its nuclear output at market price; the VNU only kicks in if nuclear revenue exceeds €78/MWh, yet it only reaches about €66/MWh in 2026, and a CRE estimate of €60.94/MWh for 2027 suggests no redistribution is expected next year either.
Most likely conclusion (50%): neither a spectacular spike nor true stability, but a gradual rise in the bill driven by the electricity grid fee (TURPE) and the capacity mechanism, like the 2.5% already applied in August 2026, without ever triggering the VNU.
Signal to watch: the CRE's tariff decision expected on February 1, 2027, which must settle the TURPE catch-up adjustment capped at 3% in 2026 and confirm whether or not EDF's nuclear revenue remains below the €78/MWh threshold.
Fairly negative
Our assessment of the impact for France: fairly negative.with a 50% probability of a gradual bill increase without VNU redistribution and 20% of a poorly offset price shock, only 30% of scenarios lead to real stability for household purchasing power.
Mechanism that took effect in 2026 requiring EDF to pay back part of its nuclear revenue to consumers if that revenue exceeds certain price thresholds, unlike the former ARENH, which set a rate in advance.
