A multinational retailer enters Mexico through a distribution joint venture. The deal closes without a merger notification filing. Eighteen months later, the competition authority opens an investigation. Fines reach into the hundreds of millions of pesos. Divestiture of the joint venture follows. The sequence is not hypothetical – it reflects a pattern that foreign businesses entering Mexico repeat with troubling regularity. Mexico's competition law regime is substantive, well-resourced, and actively enforced. Failing to understand its obligations before a transaction closes or a commercial practice begins carries concrete, measurable risks.
Competition law compliance in Mexico requires market participants to meet obligations under federal competition legislation, which governs merger notification, cartel prohibitions, market dominance restrictions, and leniency procedures. The Comisión Federal de Competencia Económica (COFECE – the Federal Economic Competition Commission) is the primary competition authority for most sectors, while a separate regulator oversees broadcasting and telecommunications. Transactions that cross prescribed asset and revenue thresholds must be notified and cleared before closing.
This guide walks through each compliance obligation in sequence – procedural requirements, filing timelines, documentary checklists, cost considerations, and a decision framework for different business scenarios. It is addressed to international businesses, investors, and in-house counsel who are managing or anticipating Mexican market exposure.
The regulatory system: understanding Mexico's competition law obligations
Mexico's competition legislation rests on constitutional provisions that mandate free competition and prohibit monopolistic practices. The operative body of law is federal competition legislation enacted to give those constitutional principles practical content. That legislation distinguishes between two categories of prohibited conduct: absolute monopolistic practices and relative monopolistic practices.
Absolute monopolistic practices are per se prohibited. They include price-fixing agreements, output restrictions, market allocation, bid-rigging, and other forms of cartel conduct. No efficiency justification or market-share defence saves conduct that falls within this category. Penalties are severe – fines calculated on annual revenues, criminal referrals for individuals, and potential de-registration of the business entity.
Relative monopolistic practices are assessed under a rule-of-reason analysis. They apply only to economic agents with market dominance – that is, substantial power in the relevant market. Exclusivity agreements, predatory pricing, tying arrangements, and cross-subsidisation between markets are examples. Whether conduct constitutes a relative monopolistic practice depends on market definition, the degree of dominance, and the anticompetitive effects produced.
COFECE also administers merger notification. Concentrations that meet the prescribed thresholds must be notified and cleared before the transaction may be implemented. Implementing a notifiable transaction without clearance – known as gun-jumping – triggers independent sanctions separate from any substantive competition concerns the deal may raise.
A separate regulatory body, the Instituto Federal de Telecomunicaciones (IFT – the Federal Telecommunications Institute), exercises competition jurisdiction over radio broadcasting and telecommunications markets. Businesses in those sectors must engage with IFT rather than COFECE for sector-specific matters, though federal competition legislation applies to both bodies.
For international businesses comparing Mexico's regime to those in other jurisdictions, our analysis of competition law compliance in the United States sets out the principal structural differences between the two systems.
Step-by-step: merger notification before COFECE
Merger notification is the compliance obligation that most frequently catches foreign businesses off-guard. The obligation arises not from the structure of the transaction but from whether numerical thresholds are crossed. Three separate threshold tests exist under federal competition legislation. A transaction triggers notification if it meets any one of the three tests – they are alternative, not cumulative.
The first test measures the aggregate value of assets or shares being acquired in Mexico. The second test measures the combined annual revenues of all parties to the transaction in Mexico. The third test assesses the transaction value against an absolute peso-denominated floor, regardless of party size. The specific monetary values of these thresholds are updated periodically by COFECE and published in the official gazette – counsel should verify current figures at the outset of any deal.
Step 1 – threshold assessment (weeks 1–2). Compile Mexican revenue and asset figures for all parties, including companies under common control. Determine which threshold test, if any, is triggered. This step requires financial data from both acquirer and target and often involves coordination across multiple group entities.
Step 2 – pre-notification engagement (weeks 2–4). COFECE accepts informal pre-notification meetings. These sessions allow counsel to discuss transaction structure, market definition questions, and document requirements before the formal filing. Pre-notification contact is not mandatory but reduces the risk of an incomplete submission and the delays that follow.
Step 3 – preparation of the notification filing (weeks 3–6). The notification form requires detailed information across several categories. A checklist of core documentary requirements includes:
- Identification of all parties and their group structures up to ultimate beneficial ownership
- Description of the transaction – assets, shares, or rights being acquired
- Definition of the relevant product and geographic markets affected
- Financial data: revenues, assets, and market shares for each relevant market
- Copies of transaction agreements and any ancillary agreements affecting market conduct
A common error by foreign clients is defining relevant markets too broadly. COFECE applies its own market definition methodology. Submitting a filing that relies on global or regional market definitions without adapting them to Mexican competitive conditions produces a deficient filing. COFECE will request supplementary information, pausing the review clock and extending the timeline by weeks.
Step 4 – formal submission and fee payment (day 1 of review clock). The notification is filed electronically through COFECE's system. A filing fee is payable at submission. The review clock starts only when COFECE confirms the filing is complete. An incomplete filing does not start the clock – this is a frequent source of delay for parties who underestimate Mexican document requirements.
Step 5 – Phase I review (up to 60 working days). COFECE has up to sixty working days to issue a resolution in standard cases. During this period, COFECE may issue requests for additional information, which pause the clock. Each pause can add two to four weeks. For transactions with straightforward competitive effects and well-defined markets, Phase I clearance is typical.
Step 6 – Phase II investigation (if opened). If COFECE identifies substantive concerns, it may open a Phase II investigation. This extends the review by an additional period – commonly several months. Phase II may conclude in unconditional clearance, conditional clearance with behavioural or structural remedies, or prohibition. Prohibition of a notifiable transaction is rare but not unprecedented in markets where the combined entity would acquire or reinforce market dominance.
The total timeline from threshold assessment to clearance in a standard transaction runs approximately three to four months. Transactions with market overlap in concentrated sectors should plan for five to seven months.
To receive a tailored assessment of merger notification requirements for your transaction in Mexico, contact us at info@ferrazwhitmore.com.
Cartel prohibitions and the leniency programme
Cartel conduct – price-fixing, market allocation, bid-rigging, and output restrictions – is the most severely sanctioned category of competition infringement in Mexico. Federal competition legislation treats these as absolute monopolistic practices. No market power threshold applies. Any economic agent participating in cartel conduct is exposed, regardless of size or market share.
COFECE has broad investigative powers. It may conduct dawn raids, compel production of documents and electronic records, and interview employees under oath. Fines are calculated as a percentage of the infringing party's annual revenues in Mexico and can reach substantial multiples of the value of affected commerce.
Individual liability is a feature of the Mexican regime that foreign businesses frequently underestimate. Directors, officers, and employees who directly participate in cartel conduct face criminal referrals in addition to administrative sanctions against the company. This creates personal exposure for executives who attend trade association meetings where pricing or market allocation is discussed.
A non-obvious risk arises at industry association level. Many cartel investigations in Mexico originate in information exchanges at trade body meetings. The mere circulation of commercially sensitive data – current prices, future capacity plans, customer lists – among competitors can constitute prohibited conduct, even without an express agreement. International executives accustomed to more permissive information-sharing norms in other jurisdictions should treat Mexican trade association participation with heightened caution.
The leniency programme administered by COFECE offers immunity or fine reductions to cartel participants who self-report and cooperate with investigations. The programme follows a marker system. The first applicant to approach COFECE may receive full immunity from fines, subject to full and continuous cooperation. Subsequent applicants receive progressively smaller reductions. Leniency is available only before COFECE has formally initiated an investigation against the applicant. Once the investigation begins, the window for first-in immunity closes.
Timing is critical. A company that suspects it has participated in cartel conduct – even inadvertently through an industry association – should assess the leniency option before COFECE acts first. Delay forfeits the immunity marker and can convert a manageable fine into a company-threatening sanction.
Businesses already subject to corporate disputes arising from competition investigations can find additional strategic context in our overview of corporate disputes in Mexico.
Market dominance: obligations and risks for dominant players
Market dominance under Mexican competition law does not itself constitute an infringement. The law prohibits the abuse of a dominant position. An economic agent holds market dominance when it has substantial power in a relevant market – meaning the ability to fix prices or restrict output unilaterally without competitive discipline from rivals or substitutes.
COFECE determines dominance through a structured analysis: definition of the relevant product market, definition of the relevant geographic market, and assessment of market shares, barriers to entry, and countervailing buyer power. A company with a large share of a narrowly defined market will be assessed differently from one with a similar share in a broadly defined market.
Conduct that constitutes a relative monopolistic practice by a dominant firm includes predatory pricing designed to exclude rivals, exclusive dealing that forecloses competing suppliers or distributors. Tying products or services together without objective justification. Additionally, loyalty rebates structured to penalise customers for dealing with competitors. The analysis in each case turns on whether the conduct produces net anticompetitive effects in the relevant market.
Foreign businesses entering Mexico through acquisition of an established market leader should conduct dominance assessments before closing. Post-acquisition commercial practices that were lawful for the seller – because the seller lacked dominance – may become prohibited once the acquirer's group holdings are combined with the target's market share. This transition risk is rarely flagged in standard due diligence unless competition counsel is specifically instructed to analyse it.
A practical scenario: a European consumer goods group acquires a Mexican distributor that holds exclusive distribution rights across several product categories. Pre-acquisition, the distributor's exclusivity arrangements were below dominance thresholds. Post-acquisition, the combined entity's shares in two product markets cross the dominance threshold. The exclusivity arrangements, unchanged in form, are now potentially subject to challenge as relative monopolistic practices. Identifying this risk before closing allows the acquirer to restructure the distribution agreements as a condition of the deal – avoiding an enforcement exposure that would otherwise materialise within the first year of operation.
For a preliminary review of your market position and dominance exposure in Mexico, email info@ferrazwhitmore.com.
Compliance programme design and self-assessment checklist
A competition compliance programme in Mexico serves two functions. It reduces the probability of inadvertent infringement by staff. It also provides a mitigating factor in COFECE enforcement proceedings – though it does not eliminate liability, a well-documented programme demonstrates good faith and operational seriousness.
An effective programme for a Mexico-facing business should address five core elements: a written competition policy, training tailored to roles with market-facing exposure. A reporting channel for competition concerns, document retention rules consistent with competition law obligations. Additionally, a periodic audit of commercial practices against dominance and cartel risk indicators.
The compliance obligations described in this guide are available to a business in Mexico under the following conditions. Use this checklist before deciding which compliance track to prioritise:
Merger notification applies if: any one of the three threshold tests is met; the transaction involves an acquisition of shares, assets, or control; and the parties have not yet closed the deal.
Leniency programme access applies if: the company has participated in conduct that may constitute a cartel. COFECE has not yet formally initiated an investigation against the company. and the company is willing to cooperate fully and continuously with the investigation.
Dominance review is warranted if: the company holds or will hold a significant share of a defined product and geographic market in Mexico. the company intends to introduce exclusivity. Loyalty. Alternatively, tying arrangements post-transaction. or a competitor or customer has raised concerns about market access.
Before initiating any filing or contact with COFECE, verify:
- All Mexican revenue and asset figures are current and include all group entities
- The relevant market definition used internally aligns with COFECE's methodology
- All transaction documents, including ancillary agreements, are compiled and translated
- Internal personnel with knowledge of the commercial practices at issue have been identified
- A competition lawyer in Mexico with COFECE filing experience has been retained
A decision framework for different business scenarios: companies entering Mexico for the first time through greenfield investment face lower immediate merger notification risk but should prioritise cartel compliance training before commercial operations begin. Companies entering through acquisition must address the merger notification question first, then dominance exposure. Companies already operating in Mexico that identify a past or ongoing competition concern should assess the leniency option before any internal investigation generates discoverable material that COFECE could later obtain through dawn raid.
Engaging a law firm in Mexico with a cross-border competition practice adds measurable value at the threshold assessment stage. Errors at that stage – missed filings, incorrect market definitions, or premature closing – produce the largest financial exposures. Our dedicated service page for competition law in Mexico sets out how Ferraz & Whitmore approaches these matters for international clients.
Frequently asked questions
Q: How long does the merger notification process take before Mexico's competition authority?
A: Once a complete filing is submitted, the competition authority has up to sixty working days to issue a resolution in standard cases. Complex transactions involving market dominance concerns or requests for additional information can extend this period significantly. Planning at least three to four months from the notification stage to clearance is prudent for cross-border transactions.
Q: Does a foreign-to-foreign merger require notification in Mexico even if the companies have no local operations?
A: A common misconception is that purely offshore transactions fall outside Mexican competition law. In practice, notification thresholds are triggered by the value of assets or revenues attributable to Mexico, regardless of where the transacting parties are incorporated. A foreign acquisition can cross Mexican thresholds if the target generates sufficient revenue in Mexico, even without a local legal entity.
Q: What are the cost implications of a leniency programme application in Mexico?
A: Engaging a lawyer in Mexico with competition law experience is essential before initiating a leniency application. Direct legal fees depend on the complexity of the cartel conduct and the volume of documentary evidence to be organised. Beyond professional fees, companies must account for internal compliance costs – including employee interviews, document reviews, and potential restatement of commercial practices – all of which can run into several months of management time.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our team combines Portuguese civil law expertise with English common law tradition to deliver cross-border legal solutions in competition law compliance, merger notification, and cartel defence across Latin American and Iberian markets. We work with international entrepreneurs, institutional investors, and in-house legal teams who need results-oriented counsel across multiple legal systems. Our competition law practice covers both civil law and common law jurisdictions, and our attorneys have advised on merger control and cartel matters before COFECE and its counterpart authorities across the Americas. The firm's Lisbon base provides direct access to EU regulatory conditions, while our Americas practice supports enforcement and compliance strategies across the region's civil law systems. As an international law firm with a dedicated Mexico practice, Ferraz & Whitmore brings sector-specific competition experience to each matter. To explore legal options for competition law compliance in Mexico, schedule a consultation at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.