Europe’s biomethane market is moving into a new phase. For many organisations, renewable gas procurement has traditionally been viewed primarily through the lens of sustainability. Replacing conventional natural gas with biomethane can help companies reduce the emissions associated with their gas consumption while supporting the development of renewable gas production. But as European biomethane markets mature, the commercial framework surrounding that procurement is becoming considerably more complex.

France provides a particularly important example. A series of regulatory changes introduced in August 2026 has altered the support framework available to biomethane producers, changed how Guarantees of Origin can be used and created new pathways for some producers to move away from existing regulated purchase contracts. Taken together, these changes demonstrate why biomethane procurement can no longer always be treated as a straightforward transaction between a buyer and a seller.

For producers, the structure of a long-term offtake agreement can increasingly affect project economics and financing. For buyers, the value of the gas cannot be separated entirely from the regulatory treatment of the environmental attributes associated with it. The result is that Gas Purchase Agreements are increasingly becoming part of a broader commercial architecture combining energy procurement, regulatory compliance, certificates and project development.

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France is changing how biomethane projects reach the market

France has developed one of Europe’s largest biomethane markets partly through regulated support mechanisms designed to provide producers with predictable revenues. Until August 2026, the regulated purchase-tariff framework covered eligible biomethane installations with forecast annual production of up to 25 GWh PCS. That threshold has now been substantially reduced. An order published on 14 August 2026 lowered the maximum annual production eligible under the current purchase-tariff framework from 25 GWh PCS to 13 GWh PCS. The amended framework applies from 15 August 2026, while the current tariff order itself is due to run until 31 December 2026.

The change does not mean that larger biomethane projects can no longer be developed in France. It does, however, change the commercial environment in which some projects need to operate.  Where guaranteed support mechanisms become narrower, producers increasingly need to consider alternative routes to market. Long-term commercial contracts, certificate revenues and the creditworthiness of potential buyers can consequently become more significant elements in the financial structure of a project.

This is where the role of the GPA becomes more important.  A Gas Purchase Agreement can provide a producer with visibility over future demand, volumes and pricing while giving the buyer greater certainty over renewable gas supply. AFS Energy describes GPAs as long-term agreements that can lock in gas prices and volumes while incorporating renewable gas sources such as biomethane.

However, the commercial significance of these contracts extends beyond price stability. For a biomethane producer evaluating a project outside a regulated support mechanism, the quality and duration of the offtake agreement can affect revenue predictability and financing. For a buyer, committing to a long-term contract means understanding not only the expected gas price but also the production characteristics, contractual obligations and environmental attributes associated with the supply. This makes renewable gas procurement increasingly connected to project economics. The buyer is no longer simply purchasing a commodity. In some structures, its long-term demand can form part of the commercial foundation supporting the production asset itself. From a bank’s perspective, an offtake agreement with a creditworthy buyer significantly de-risks the project. It locks in the predictable cash flow lenders require for debt service, shielding the facility from market volatility and securing essential loan capital.

France is also creating a pathway away from existing support contracts

Another important part of France’s 2026 changes concerns producers that are already operating under regulated purchase contracts. Normally, terminating one of these contracts early can trigger financial consequences. Under the current framework, a producer choosing to terminate its regulated purchase agreement may be required to compensate the contractual counterparty according to a prescribed calculation.

The August reforms introduce an important exception. A producer may terminate an eligible purchase contract before 31 December 2027 without paying the normal termination compensation when that termination is made in favour of entering into a contract for the purchase of biomethane production certificates, provided specified conditions are met. Among those conditions, the new contract must cover annual biomethane production at least equivalent to the relevant level under the previous purchase contract and must have a duration of at least five years.

This is a technical regulatory change, but its commercial significance is broader. It creates greater flexibility for certain producers to reconsider how their biomethane is monetised. Rather than assuming that a production asset will remain permanently within the support structure under which it was originally developed, producers may increasingly need to compare different combinations of commodity revenues, certificate values, contract duration and counterparty risk. That creates a more dynamic market for buyers as well. Corporate buyers looking to secure renewable gas may encounter producers operating under very different commercial structures. Some production may continue to sit within regulated frameworks. Other projects may rely more heavily on long-term commercial offtake. Others may combine the sale of physical biomethane with separate or interconnected environmental attributes.

Understanding which structure offers the most appropriate balance of price, security and sustainability therefore requires more than identifying available supply. It requires understanding how the project itself reaches the market. This becomes particularly relevant when a buyer is considering a multi-year GPA. A contract that appears attractive based solely on the commodity price may carry different implications once production support, certificate ownership, volume obligations, credit exposure and regulatory change are incorporated into the analysis. As with PPAs in the electricity market, renewable gas agreements increasingly need to be structured around the purpose the contract is expected to serve.

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The Guarantee of Origin is becoming part of the procurement decision

France’s August reforms also introduced changes to the rules governing biogas Guarantees of Origin. This matters because the environmental characteristics of renewable gas are not communicated solely through the physical movement of gas through the network. Once biomethane is injected into the gas grid, the molecules become indistinguishable from other gas within the network. Guarantees of Origin therefore provide the documentary mechanism linking renewable gas production with the environmental claim made by a consumer. The regulatory treatment of those certificates is consequently a critical part of renewable gas procurement.

Under the French framework, a biogas Guarantee of Origin can only be used once. The rules also require the associated consumption period to overlap, at least partly, with the GO’s twelve-month validity period, while that declared consumption period cannot exceed one year. The August decree additionally restricts certain Guarantees of Origin generated under specified supported biogas contracts to consumption of natural gas supplied through a gas distribution or transmission network.

These provisions may sound administrative, but they illustrate an important procurement principle. Buying renewable gas and managing the environmental evidence associated with that gas cannot always be treated as two entirely separate processes. The timing of production, the issuance of the certificate, its transfer, its cancellation and the consumption period against which it is applied need to align with the relevant regulatory requirements.

For corporate buyers operating across multiple markets, this can become particularly important. A company may have annual gas consumption targets, decarbonisation objectives and internal reporting cycles that do not naturally correspond with the certificate rules of each national market. A procurement strategy therefore needs to consider when the renewable gas is produced, when the associated attributes become available and how those attributes can ultimately be used.

The same principle applies to producers. The commercial value of biomethane may be influenced not only by the physical gas but by how the related environmental attributes can be monetised and transferred. Commodity value and certificate value therefore become increasingly interconnected.

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A GPA is increasingly more than a gas contract

The changes taking place in France illustrate a broader evolution in European renewable energy procurement. Long-term energy contracts were once frequently approached primarily as tools for securing price certainty. That function remains important. AFS Energy notes that GPAs can help organisations secure gas prices and volumes over longer periods, reducing exposure to market volatility while also providing access to renewable alternatives such as biomethane.

But the value of a GPA increasingly depends on more than the agreed price per megawatt-hour. A producer may need the agreement to support long-term revenue visibility. A corporate buyer may need renewable gas to contribute towards a decarbonisation target. The organisation may also need certainty regarding the environmental attributes associated with that supply.

The contract must therefore address questions around volume, duration, pricing structure, creditworthiness, delivery risk and regulatory change while ensuring that the treatment of Guarantees of Origin or other relevant certificates supports the intended purpose of the procurement. This creates an important distinction between gaining access to the biomethane market and structuring the right agreement within that market.

Finding a willing buyer or seller remains essential. But market access is increasingly only the starting point. Before entering into a GPA, organisations need to understand what they are attempting to achieve.

Is the priority securing long-term renewable gas supply?

● Is the agreement intended to provide greater price stability?

● Does the buyer require environmental attributes alongside the physical gas?

● How will those attributes be transferred and cancelled?

● What happens if the regulatory framework changes during a multi-year contract?

And for producers, what combination of commodity price, certificate value, contract duration and counterparty security creates the most appropriate route to market?

Those questions directly influence how the agreement should be structured. AFS Energy’s approach reflects this broader role. Through its PPA and GPA activities, AFS works across its counterparty network to structure contracts around the required energy volumes, region and technology while supporting the administrative and regulatory processes surrounding the transaction. That advisory element becomes increasingly important as renewable gas markets evolve.

France’s biomethane reforms demonstrate why. The reduction of the regulated purchase-tariff threshold changes the commercial environment for new projects. The possibility for certain producers to move from existing purchase contracts into alternative certificate-based arrangements creates new strategic choices. At the same time, tighter rules around Guarantees of Origin mean the environmental attribute attached to biomethane needs to be managed with greater attention to timing and regulatory eligibility.

For buyers and producers alike, these developments bring the commodity contract, the environmental certificate and the project’s commercial structure closer together.

The question is therefore no longer simply: “What combination of gas, contract structure and environmental attributes will achieve the commercial and sustainability objective behind the procurement?”

As European renewable gas markets mature, answering that question correctly will become increasingly important.

The GPA of the future is unlikely to be defined solely by the price and volume of gas exchanged between two counterparties. It will increasingly sit at the intersection of energy procurement, project finance, regulation and environmental markets.

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Learn more about how AFS Energy supports organisations with tailored PPA and GPA advisory, market access and contract structuring: Explore AFS Energy’s PPA & GPA solutions