ATRT 8 increase in 2026: what is the impact on corporate gas bills?

As of April 1, 2026, gas transmission tariffs are changing once again. The ATRT 8 is rising by 3.41%. While this increase remains contained, it has a direct impact on corporate gas bills.

After several years of high volatility in commodity prices, infrastructure costs are taking up an increasing share of the bill. In the background, the energy transition and decarbonization are driving new investment needs in gas transmission networks.

In a context where controlling energy costs has become a strategic priority, this development raises practical questions: what is the impact on your business gas bill? Which profiles are most exposed? How can you anticipate and manage this increase?

Sirenergies breaks down the changes to the ATRT 8 and the strategies for regaining control over your gas budget.

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The ATRT 8 is increasing by 3.41% as of April 1, 2026, driven by inflation (+0.41%) and a CRCP regularization (+3%). Transmission tariffs account for an average of 5% of a business gas bill. The estimated overall impact on the total bill ranges from +0.2% to +1%, depending on the consumption profile.

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Key takeaways

• 3.41% increase in transmission tariffs as of April 1, 2026;
• Estimated impact of +0.2% to +1% on the total gas bill;
• Average share of ATRT in the gas bill: 5%;
• Impact varies according to subscribed capacities and consumption profile;
• Contractual and technical levers can help limit this additional cost.

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1. What is the ATRT 8 for gas: definition and role?

The ATRT is an essential component of the price of gas, just like the supply (the commodity itself) and taxes.

ATRT stands for "Accès des Tiers aux Réseaux de Transport" (Third-Party Access to Transmission Networks). This transmission tariff funds the operation, maintenance, and development of gas transmission networks managed by NaTran (formerly GRTgaz) and Téréga.

Set by the French Energy Regulatory Commission (CRE) for four-year periods, this regulated tariff is revised every year on April 1.

The ATRT 8 came into effect in 2024. After a decrease in 2025, it is rising again in 2026. It is no longer just the price of the commodity that causes the bill to fluctuate: the structure of network costs is playing an increasingly significant role.

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2. Why is the ATRT 8 increasing in 2026?

The increase in the ATRT in 2026 is due to changes in tariff mechanisms and the profound transformations of the gas system in France.

2.1. What are the ATRT tariff mechanisms?

In its deliberation of December 16, 2025the CRE has approved a 3.41% increase in ATRT 8 tariff terms. This change is due to two factors:

• Accounting for inflation (+0.41%);
• CRCP regularization (+3%): the Income and Expense Regularization Account allows for adjustments between the actual costs incurred by network operators and the revenue actually collected.

2.2. What are the structural causes of the ATRT increase?

Beyond tariff adjustments, the rise in ATRT 8 reflects fundamental structural changes.

Decline in gas consumption: a direct impact on the transmission tariff

For several years, natural gas consumption has been declining in France. After a 5.2% drop in 2024, NaTran observed a further 3% decrease in 2025. 

The cause: energy conservation efforts, driven by rising energy prices and environmental concerns.

With lower volumes being transported, fixed operating costs are spread across a smaller base.

Result: the unit cost of transmission increases for every consumer.

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Figure 1: trend in gross gas consumption in France since 2022

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Source: NaTran, Téréga, GRDF - chart: connaissance des énergies 

Energy transition: investments weighing on the ATRT

The increase in the ATRT is part of the ongoing transformation of the gas system. Network operators are accelerating the adaptation of infrastructure to meet energy challenges, with a focus on the decarbonization of professional and domestic usage. This involves, in particular, the development of low-carbon gases, such as biomethane and hydrogen. High investment costs are passed on to the transmission tariff.

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3. What is the real impact of ATRT 8 on professional gas bills?

3.1. A limited impact on the total bill

The transport tariff accounts for an average of 5% of a professional gas bill. This share remains modest compared to other components: supply accounts for nearly 50% and taxes for 25%.

The 3.41% increase in the ATRT therefore has a measured impact on the gas budget, estimated between +0.2% and +1% depending on the consumption profile and subscribed transport capacities.

To adjust your subscribed capacities in real time and avoid extra costs related to the ATRT, test our management interface.

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3.2. What is the estimated impact of the ATRT according to consumption profile?

The ATRT consists of both fixed and variable costs. Fixed costs are linked to the operation and maintenance of transport infrastructure; variable costs depend on the volumes of gas transported.

The actual impact of the increase in the transport tariff varies primarily based on subscribed capacities and contractual parameters. The estimates below provide orders of magnitude, based on the average share of the ATRT in professional bills and generally observed consumption structures.

Table 1 — Impact of the 2026 ATRT 8 increase by gas consumption profile

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4. How can you limit the impact of the ATRT on your gas budget?

The regulatory increase in the ATRT does not, on its own, drastically change the total cost of a gas contract. Like any expense item, this tariff must be taken into account when comparing offers. There are ways to optimize the amount.

4.1. How can you optimize subscribed transport capacities?

The ATRT is directly linked to the capacities reserved on the transport network. Oversizing generates unnecessary costs; conversely, underestimating can lead to penalties or adjustments.

An energy management tool, such as Pilott, allows you to visualize your consumption profile over time and adjust transport capacities as accurately as possible. This lever is particularly effective for large T3 and T4 consumers: for them, capacity optimization often has a significant financial impact.

4.2. How can you buy gas at the best price?

A professional gas bill consists of three elements:

• Supply (the molecule);
• Transport and distribution (ATRT for transport and ATRD for distribution);
• Taxes and contributions.

While consumers are subject to changes in transport tariffs, taxes, and contributions, purchasing the molecule at the best price can partially offset regulatory increases. Monitoring market prices is crucial for identifying the most favorable purchasing windows.

4.3. Why put gas suppliers in competition?

Choosing a gas supplier is about more than just the price of the commodity. Other factors influence your final bill: the contract structure, the quality of service, and the relevance of the advice provided.

Tailored support allows you to:

• Optimize your contract and pricing structure;
• Integrate and optimize transmission components;
• Anticipate regulatory changes;
• Negotiate purchasing and service terms.

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"Thanks to Sirenergies, I reduced my energy bill by more than 20% without changing my habits." — Bruno SKRZYPINSKI, Manager, VIVAL (SME)  Discover the full testimonials from our clients

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ATRT 8 increase: keys to controlling your business gas bill

The ATRT 8 increase on April 1, 2026, is a regulatory requirement. An increase in your business gas bill is not. The impact of transmission tariffs can be managed by combining:

• Optimization of subscribed capacities;
• Purchasing at the right time;
• Putting suppliers in competition;
• Proactive market monitoring.

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The expertise of an energy procurement consulting firm is the most effective lever for quickly identifying concrete and sustainable optimization opportunities.

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Benefit from a bespoke purchasing strategy to offset regulatory changes and secure your gas budget.