For years, Brazil’s free energy market was the domain of large industrial companies and energy-intensive business networks. Consumers with demand below 1,500 kW were left out, buying electricity from the local distribution utility, paying tariff flags, and having little say over the source of their electricity. That model is changing, and the 2026 regulatory calendar marks a concrete turning point.
With the approval of Law 15,269/2025, Brazil established the definitive timetable for opening the Free Contracting Environment to smaller consumers. The impact goes beyond cost savings. For energy managers, executives with ESG targets, and investors in the sector, this opening creates a real window to contract clean energy directly, including biomass, biomethane, and other firm renewable sources that, until now, had limited reach among medium-sized consumers.
But this moment also comes with complexity. The free energy market is going through one of its worst liquidity crises in recent years, with the PLD soaring and energy traders facing difficulties in honoring contracts. Entering the market now requires more than regulatory eligibility. It requires market insight.
What Law 15,269/2025 actually changed
Before Law 15,269/2025, the opening of the free energy market had been progressing gradually, but without a definitive timeline for smaller consumers. The new law established a schedule with binding deadlines: within 24 months of its publication, commercial and industrial low-voltage consumers will be able to migrate to the ACL. Within 36 months, full opening will also include residential consumers.
In practical terms, this means that companies with contracted demand between 100 kW and 500 kW, which are currently still in the regulated market, now have legal eligibility expected for the second half of 2026, following the publication of complementary regulatory acts by ANEEL and a decree from the Ministry of Mines and Energy.
The law also introduced other relevant structural changes. It created the Supplier of Last Resort (SUI), a regulatory mechanism that guarantees emergency supply if an energy trader fails, partly mirroring the concept of the Credit Guarantee Fund in the financial market. It established the creation of a standard product with a reference price to make comparisons easier, especially for smaller consumers. And it determined the tariff separation between the regulated and free environments, something the sector had been requesting for years to bring more transparency to costs.
One change that deserves special attention is the end of the TUSD discount for new entrants. Consumers who migrate to the ACL after the publication of the law will no longer be entitled to the discount on the Distribution System Usage Tariff previously granted to incentivized renewable energy. Consumers already in the free market will continue to keep the benefit for the original contracted level. But new contracts will no longer carry this automatic discount, which directly changes the feasibility calculation of migration for many consumption profiles.
Clean energy in the free market: how it works today
To understand what changes for those who consume or want to consume clean energy, it is important to understand how the free market already worked before the new law.
The ACL divides consumers into categories. Consumers with demand between 500 kW and 3 MW are known as special consumers and may only contract energy from incentivized sources, such as Small Hydropower Plants (SHPs), biomass, landfill biogas, and other renewables. Until 2025, this group still benefited from 50% to 100% discounts on the TUSD, which made migration financially attractive even with a high PLD.
Consumers with demand above 1,500 kW have full freedom to choose their energy source, allowing them to contract conventional or renewable energy according to their strategy.
For those who consume biomethane or want to use biomass as an energy input, the free market represents a specific opportunity. 100% incentivized energy (I100%) is mainly granted to thermal generation projects that use biomass from organic solid waste or landfill biogas, two sources that are expanding rapidly in Brazil and have a firm, non-intermittent generation profile, something highly valued by industries that need supply predictability.
This means that a company with demand between 500 kW and 1,500 kW migrating to the ACL today can, in addition to potential tariff savings, sign a contract directly with a biomass or biogas generator, obtain I-REC certificates proving the use of traceable renewable energy, and present this as an asset in ESG reports and carbon audits. The connection between the free market, clean energy, and the corporate decarbonization agenda is direct.
The market moment: real opportunity or trap?
Here, the analysis requires honesty. Brazil’s free energy market in 2026 is under heavy pressure.
The average PLD rose 84% between 2024 and 2026, increasing from R$129 per MWh to R$236 per MWh. Quarterly contracts reached R$317 per MWh, up 121% over the same period, while official inflation rose by only 5%. The yellow tariff flag in May 2026 signals that generation costs are rising, with rainfall below the historical average in the main subsystems and greater dispatch of thermal power plants.
The liquidity crisis has led energy trading companies of different sizes to face significant contractual difficulties. Tradener, one of the oldest companies in the sector, went to court to maintain operations after debts that may reach R$5.4 billion, while other companies such as Elétron Energia and IBS Energy filed for judicial protection in early 2026. Industry associations published a statement describing the situation as one of “unsustainable liquidity restriction” and calling for regulatory changes.
For those assessing whether to migrate to the free market in this context, the right question is not “should I go or not?” It is “with what contractual structure, with which partner, and on what timeline?”
Long-term contracts, structured with well-capitalized suppliers and verifiable backing, remain the safest way to capture ACL savings without exposure to the spot PLD. Exposure to the short-term market, where prices have surged, is the risk that brought down many trading companies. Consumers who entered the ACL through well-structured bilateral contracts, with terms of three to five years, felt far less volatility.
Eva Energia is an example of a free-market agent focused on structured contracts for consumers seeking clean energy with predictability, which aligns especially well with the profile of companies that will enter the ACL in the next opening phases.
What to consider before migrating: a guide for decision-makers
The opening of the free market creates opportunity, but migration is neither automatic nor risk-free. There are four dimensions that every energy manager or financial director should consider before starting the process.
The first is the consumption profile. The migration process to the ACL takes between 6 and 9 months, including feasibility analysis, selection of a representative at CCEE or a retail agent, metering adjustments, and contractual formalization. Companies with demand between 100 kW and 500 kW that want to be in the free market still in 2026 need to begin the analysis now.
The second is the contractual structure. In the ACL, tariff flags do not apply. But exposure to the PLD, if the consumer is uncontracted or only partially protected, can cost more than any red tariff flag. The type of contract, whether fixed, indexed to the PLD, or hybrid, defines the level of risk assumed. For companies with cash flow that is less tolerant of fluctuations, fixed-price contracts or contracts with a price cap are more appropriate, even if the initial cost is slightly higher.
The third is the choice of source. Companies with decarbonization targets, sustainability reports, or commitments to Science Based Targets cannot treat the choice of energy source as a detail. In the ACL, it is possible to contract energy from biomass, landfill biogas, SHPs, and other sources with firm generation, obtaining traceability through certificates. This choice directly impacts Scope 2 emissions indicators, which measure the indirect carbon footprint associated with electricity consumption.
The fourth is the strength of the commercial partner. The current crisis in the free market has exposed that not all energy traders have the same financial robustness. Checking the supplier’s track record, backing portfolio, and contractual guarantees has become a non-negotiable step. A 15% saving on the electricity bill that comes with the risk of contractual disruption is not a good deal.
ESG as a real driver, not just rhetoric
One of the most relevant changes that the opening of the free market brings to medium-sized companies is the real possibility of aligning energy strategy with the ESG agenda, something that was previously a privilege of large consumers with direct negotiation power.
By entering the ACL, an industrial company with demand of 300 kW, for example, can choose to contract energy from a certified SHP, associate that contract with traceable I-RECs, and present this data in sustainability reports based on verifiable evidence. This becomes especially important in the context of the Mercosur-EFTA agreement, which, for the first time in a trade agreement negotiated by Brazil, included obligations regarding the use of a clean electricity matrix in service provision, with practical consequences for those who fail to meet environmental targets.
For exporters and companies supplying global chains, the ability to prove clean energy consumption will cease to be a differentiator and become a market requirement. The free market is the instrument that makes this proof possible in a contractual and auditable way.
Conclusion
Brazil entered 2026 with one of the most intense regulatory agendas in recent years for the electricity sector. Law 15,269/2025 created the framework for hundreds of thousands of new consumers to enter the Free Contracting Environment over the next two years. For companies with decarbonization commitments, this opening is not just an opportunity to reduce costs. It is a gateway to clean energy, biomass, and biomethane contracts that, until now, were out of reach for medium-sized consumers.
The current market moment, however, calls for caution. The liquidity crisis in the ACL, the high PLD, and the instability of some energy traders require the decision to migrate to be structured, not merely opportunistic. Those who enter with a well-designed contract, a verifiable source, and a solid partner will be better positioned both for immediate savings and for the regulatory challenges still ahead.
The opening has been approved. The timetable has been defined. What many companies still need is preparation.
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