Competition Risks for E-commerce Platforms in Bulgaria 2026: Compliance Checklist for Marketplaces and Online Retailers

Last updated: 02 Sept 2026

Introduction: why 2026 matters for e-commerce platforms in Bulgaria

E-commerce competition Bulgaria is no longer a peripheral compliance concern for online businesses. Recent amendments to the Protection of Competition Act have widened the range of prohibited conduct, sharpened the definitions that determine who is caught by the rules, and expanded the investigatory and remedial powers of the national competition authority. For marketplaces and online retailers, this means the gap between a well-run platform and an enforcement target is now measured in the detail of contracts, algorithms and monitoring systems.

This guide translates the legal changes into operational controls. You will find a plain-language summary of the updated framework, an ordered list of the top competition risks, an explanation of when platforms can be held liable for third-party conduct, a comparison table for pricing and parity clauses, and a ten-step compliance checklist with owners and evidence to retain. For the broader statutory context, see our Competition Law Bulgaria overview resource, which complements this platform-specific analysis.

1. The updated legal framework: Protection of Competition Act and overlapping EU rules

The Protection of Competition Act is the primary Bulgarian statute governing anti-competitive agreements, abuse of dominance and unfair competition. It is administered by the Commission for Protection of Competition (CPC), the national authority responsible for opening investigations, imposing fines and ordering remedies. Recent amendments modernised several parts of the regime and, in doing so, materially changed the risk profile for digital platforms. The official consolidated text is published through the State Gazette (Darzhaven Vestnik), and any statutory reference you rely on for internal compliance should be checked against that primary source, as well as against the official texts published by the Commission for Protection of Competition.

Key provisions affecting platforms

For e-commerce competition Bulgaria compliance, the provisions that most directly affect platforms cluster around four themes:

• Prohibited agreements and concerted practices. Horizontal and vertical arrangements that restrict competition remain prohibited. For marketplaces, the concern is that platform architecture, seller terms or shared data can facilitate coordination between otherwise independent sellers.
• Abuse of dominance. Where a platform holds significant market power, conduct such as self-preferencing, discriminatory access or the imposition of unfair trading conditions can attract scrutiny. The exploitative dimension of dominance, including unfair pricing, remains a recognised category of concern under Bulgarian and EU law.
• Definitions and scope. The concept of an “undertaking” is broad and captures marketplace operators as well as individual sellers. Platforms should not assume they sit outside the rules simply because they describe themselves as intermediaries.
• Investigative and remedial powers. The CPC’s toolkit includes information requests, inspections, and the power to impose behavioural remedies alongside financial penalties. These enforcement powers are why documentary discipline now matters more than ever.

EU instruments that matter

Bulgarian competition law does not operate in isolation. Several EU instruments layer additional obligations onto digital platforms:

• Digital Services Act. Regulation (EU) 2022/2065 imposes due-diligence and transparency duties on intermediary services and, more intensively, on very large online platforms. These duties intersect with competition compliance, particularly around notice-and-action systems, transparency reporting and the design of recommender systems.
• Digital Markets Act. Regulation (EU) 2022/1925 imposes specific obligations on designated “gatekeeper” platforms, including restrictions on self-preferencing and certain parity practices. It applies only to platforms formally designated by the European Commission, but its principles inform the wider regulatory climate.
• E-commerce Directive. Directive 2000/31/EC sets out the intermediary liability safe harbours and the conditions under which a hosting provider may lose that protection, notably where it plays an active role or fails to act on notice of illegal content or conduct. Note that the DSA has recast several of these liability provisions.
• EU antitrust principles. The European Commission’s antitrust framework informs how the CPC interprets restrictive agreements and abuse, and it provides the basis for parallel or coordinated investigations in cross-border cases.

Consumer protection and advertising overlap

Competition compliance overlaps with consumer protection. The Commission for Consumer Protection (KZP) enforces rules on advertising, unfair commercial practices and consumer-facing obligations online. Practices such as misleading price presentation, drip pricing or deceptive scarcity claims can trigger consumer protection enforcement even where they fall short of a competition infringement, and the two regimes increasingly reinforce one another in the digital marketplace context.

2. Top competition risks for e-commerce platforms in Bulgaria (2026)

Understanding the specific risk categories is the foundation of any credible compliance programme. The following risks are the most material for e-commerce competition Bulgaria in 2026, each accompanied by a plausible platform scenario and a mitigation headline.

• Facilitating seller cartels and price-fixing. A marketplace that provides shared pricing tools, publishes competitor-level data or hosts seller forums can inadvertently become the conduit for horizontal coordination. Even without agreeing to fix prices itself, a platform that enables coordination can be exposed. Mitigation: restrict data sharing, monitor for parallel pricing patterns, and remove features that facilitate signalling.
• Parity and most-favoured-nation clauses. Clauses requiring sellers not to offer better prices or terms elsewhere are among the highest-risk provisions in platform contracts. Wide parity clauses in particular can foreclose competition between sales channels. Mitigation: audit and, in most cases, remove or narrow parity obligations.
• Algorithmic price coordination and dynamic pricing. Where multiple sellers use the same pricing algorithm, or where a platform’s own algorithm aligns prices, the outcome can resemble a cartel even absent explicit agreement. Mitigation: audit algorithm design and logic, and document that pricing decisions remain independent.
• Refusal to deal and horizontal exclusions. Selective de-listing, discriminatory onboarding or exclusionary access decisions by a powerful platform can amount to abuse. Mitigation: apply objective, documented and non-discriminatory access criteria.
• Excessive pricing claims. The treatment of excessively high or otherwise unfair prices as a form of exploitative abuse increases the exposure of dominant operators whose pricing appears disconnected from economic value. Mitigation: retain economic justification for pricing and commission structures.
• Abuse of dominance by gatekeeper platforms. Self-preferencing in search rankings, tying of ancillary services and leveraging of data advantages are classic concerns for platforms with market power. Mitigation: separate first-party and third-party treatment and document ranking logic.

The practical lesson for platform operators is that risk sits not in headline conduct alone but in the fine print of contracts, the design of systems and the data that flows between sellers.

3. Marketplace liability: when platforms can be held responsible

One of the most frequently asked questions in e-commerce competition Bulgaria is whether an online marketplace can be liable for the anti-competitive conduct of its third-party sellers. The short answer is yes, but the analysis depends on the platform’s role, knowledge and design choices.

Liability tests: control, design, knowledge and role

Three broad liability models are relevant:

• Direct liability. Where the platform itself is party to a restrictive agreement or engages in abusive conduct, it is liable in its own right as an undertaking.
• Contributory or secondary liability. Where the platform facilitates, organises or provides the infrastructure for seller coordination, for example by administering a common pricing mechanism, it can share responsibility even if it does not sell the affected goods. EU case law has recognised that a facilitator can be party to an infringement.
• Knowledge and notice regimes. The intermediary safe harbours under the E-commerce Directive (as recast by the DSA) protect genuinely passive hosts, but that protection is lost where the platform plays an active role or fails to act after being put on notice of unlawful conduct. This notice-and-action logic increasingly informs how enforcement authorities assess platform responsibility.

The Bulgarian assessment: what the CPC is likely to consider

In assessing platform responsibility, the CPC is likely to examine the degree of control the operator exercises over pricing and listings, the design of the marketplace and whether it encourages or enables coordination, the contractual terms imposed on sellers, and the platform’s response once it becomes aware of problematic conduct. A marketplace that designs its systems to prevent coordination, imposes clear prohibitions in its seller terms and acts promptly on red flags is in a materially stronger position than one that is passive or, worse, complicit through its architecture.

What the CPC seeks as evidence

Where the CPC opens an investigation, the evidence it typically pursues includes seller and platform contracts, internal and external communications, algorithm and ranking logs, and pricing and transaction data. The consistency between what a platform’s terms say and what its systems actually do is often decisive. This is why documentary discipline, retaining coherent, contemporaneous records of decisions, is a core compliance control rather than a mere administrative task.

What triggers CPC investigations

Investigations may be prompted by complaints from competitors or sellers, by market monitoring, by referrals from other authorities, or by leniency applications from participants seeking reduced penalties. The CPC also has the power to conduct inspections. Because a trigger can arise from any direction, platforms should assume that their systems and contracts may be examined and should build compliance accordingly. The interaction between EU and national antitrust processes, described in the case law of the Court of Justice of the European Union, further shapes how platform liability and algorithmic coordination are assessed across the single market.

4. Pricing clauses and parity: permitted, risky or forbidden?

Pricing and parity clauses are among the most scrutinised areas of platform contracting. The table below compares the main clause types and their risk level, the underlying CPC concern and the recommended action. Treat all clause language as a template requiring lawyer review before use.

The practical takeaway for price parity clauses in Bulgaria is that wide parity and resale price maintenance should be treated as off-limits, while narrow parity, bilateral MFN, algorithmic parity and MAP arrangements require careful, documented justification and, in many cases, redrafting. When in doubt, remove the restriction and preserve the ability to demonstrate that pricing decisions across channels remain genuinely independent.

5. Practical 10-step compliance checklist for marketplaces and online retailers

This is the operational core of e-commerce competition Bulgaria compliance. Each step sets out why it matters, how to execute it, who should own it and the evidence to retain. Use it as an exportable checklist for your compliance team.

1. Regulatory mapping and gap analysis. Why: you cannot comply with rules you have not mapped. How: catalogue the CPA provisions, DSA duties, E-commerce Directive safe harbours and consumer protection obligations that apply to your model. Who: legal and compliance. Evidence: a dated gap-analysis register with owners and remediation deadlines.
2. Contract audit of seller and platform terms. Why: contracts are the first place the CPC looks. How: review seller onboarding agreements, platform T&Cs, indemnities and cooperation clauses against the risk categories above. Who: legal. Evidence: a redline log showing each clause reviewed, its risk rating and the decision taken.
3. Pricing clause removal or redrafting. Why: parity and RPM provisions carry the highest exposure. How: delete wide parity and RPM clauses; narrow or justify remaining restrictions using the comparison table. Who: legal with commercial sign-off. Evidence: versioned contracts and a justification memo for any retained restriction.
4. Search and algorithm controls audit. Why: ranking and pricing algorithms can produce coordinated or self-preferencing outcomes. How: document algorithm logic, test for parity or self-preferencing effects, and separate first-party from third-party treatment. Who: product and engineering with legal oversight. Evidence: algorithm design documentation and test results, dated.
5. Monitoring and detection programme. Why: facilitating seller coordination is a live liability risk. How: establish flags for suspicious parallel pricing, unusual seller communications and coordinated behaviour. Who: compliance and data teams. Evidence: monitoring policy, flag definitions and escalation records.
6. Notice-and-takedown and de-listing procedures. Why: safe-harbour protection depends on acting on notice. How: implement a documented process for receiving, assessing and acting on notices of unlawful conduct, including de-listing. Who: operations with legal input. Evidence: a notice log with timestamps and outcomes.
7. Internal reporting and leniency policy. Why: early self-detection reduces exposure and may qualify for leniency. How: create confidential reporting channels and a decision framework for whether to apply for leniency or seek a settlement. Who: compliance and external counsel. Evidence: reporting policy and a documented escalation matrix.
8. Training and standard operating procedures. Why: most infringements involve staff who did not recognise the risk. How: deliver role-specific training for commercial, product and category teams, with SOPs on prohibited communications and clauses. Who: compliance and HR. Evidence: attendance records, training materials and assessment scores.
9. Incident response and self-reporting. Why: a fast, controlled response limits penalties and reputational damage. How: maintain an incident-response plan covering internal investigation, legal hold and, where appropriate, self-reporting to the CPC. Who: legal with executive sponsorship. Evidence: the incident-response plan and any investigation files.
10. Recordkeeping and audit trails. Why: the consistency between what you say and what you do is decisive in an investigation. How: retain versioned contracts, algorithm logs, monitoring outputs and decision memos under a defined retention schedule. Who: compliance and IT. Evidence: a retention policy and demonstrable, retrievable records.

6. Practical drafting redlines and sample clause language

The following redlines illustrate the direction of travel for common platform clauses. Each is a template that requires lawyer verification before adoption, do not deploy sample language without a jurisdiction-specific review.

• Pricing provisions. Replace “Seller shall not offer lower prices on any other channel” with a neutral statement that the seller sets its own prices independently and that the platform does not restrict pricing on other channels. Rationale: removes the parity restriction that most concerns the CPC.
• MAP / MFN clauses. Where a MAP clause is retained, confine it expressly to advertised prices and state that it does not restrict actual selling prices. Delete bilateral MFN commitments unless a narrow, justified version is advised. Rationale: prevents drift into resale price maintenance.
• Seller onboarding. State objective, transparent and non-discriminatory access criteria, and record the basis for any refusal or de-listing. Rationale: defends against refusal-to-deal and discrimination claims.
• Marketplace indemnities and limitation of liability. Ensure indemnities do not purport to transfer liability for the platform’s own conduct, and align limitation clauses with mandatory law. Rationale: unenforceable exclusions provide no protection and may signal awareness of risk.
• Removal and termination rights. Provide clear, documented grounds for removing listings or terminating sellers who engage in prohibited conduct. Rationale: supports the notice-and-action logic that preserves safe-harbour protection.
• Cooperation clauses for investigations. Include obligations on sellers to preserve records and cooperate with lawful regulatory requests. Rationale: facilitates evidence preservation and demonstrates good-faith compliance.

7. Enforcement landscape and penalties: what to expect from the CPC

The enforcement environment for e-commerce competition Bulgaria has become more assertive. The CPC’s investigatory toolkit includes information requests, inspections and the power to gather documentary and electronic evidence. On finding an infringement, it can impose financial penalties and order remedies that are typically behavioural, for example, requiring the removal of offending clauses or changes to platform design.

Under Bulgarian and EU law, fines for serious infringements can reach a significant proportion of an undertaking’s turnover; the applicable ceilings and calculation methods are set by the Protection of Competition Act and the CPC’s methodology, and any figure should be checked against the current rules rather than assumed. The treatment of exploitative conduct, including unfair or excessively high prices, means dominant operators should be particularly alert to how their pricing and commission structures are justified. Where conduct has a cross-border dimension, the CPC may coordinate with the European Commission and other national authorities through the European Competition Network, drawing on the shared EU antitrust framework.

For platforms, this raises the prospect of parallel exposure across multiple jurisdictions from a single course of conduct.

Two procedural avenues can mitigate exposure. Leniency may reduce penalties for participants who come forward with evidence of a cartel infringement, and settlement or commitment procedures may allow a matter to be resolved through agreed remedies. Both require careful, counsel-led judgement about timing and strategy, and both depend on the quality of the records a platform has retained. The stronger your audit trail, the better positioned you are to negotiate.

8. Preparing for audits, investigations and inspections: operational playbook

Preparation is the difference between a controlled response and a crisis. Build the following into your operational readiness:

• Evidence preservation and legal hold. On becoming aware of an investigation or inspection, immediately suspend routine deletion and issue a legal hold across relevant systems, including email, chat, algorithm logs and pricing data.
• Privilege management. Identify and segregate legally privileged materials, and ensure staff understand not to waive privilege inadvertently. Note that the scope of legal privilege in competition proceedings differs between national and EU processes.
• Communications protocols. Nominate a single point of contact for the authority, brief front-line staff on how to respond to an inspection, and prohibit ad hoc communications about the matter.
• External counsel engagement. Engage competition counsel at the earliest possible moment; the first hours of an inspection shape the entire process.
• Post-event review. Document what was requested and provided, and conduct an internal debrief to close any gaps revealed by the process.

9. Conclusion: next steps and when to engage counsel

E-commerce competition Bulgaria in 2026 rewards platforms that treat compliance as an operational discipline rather than a paper exercise. The Protection of Competition Act, read alongside the DSA, the DMA, the E-commerce Directive and consumer protection rules, has raised the stakes for marketplaces and online retailers, particularly around pricing clauses, algorithmic coordination and the responsibility a platform bears for the conduct it enables. The most effective response is a prompt contract audit, the removal or redrafting of parity and resale price clauses, a working monitoring programme and staff training, all underpinned by disciplined recordkeeping.

Because the application of these rules turns on the specific design of your platform and the wording of your contracts, template controls and checklists should be validated against your own model and against the primary sources before you rely on them. Businesses seeking a platform compliance audit or bespoke advice on e-commerce competition Bulgaria can request support through Global Law Experts. Further practical guidance is available in our Strengthening Competition Law in Bulgaria commentary.

Sources

1. Commission for Protection of Competition (CPC)
2. State Gazette (Darzhaven Vestnik)
3. European Commission, Antitrust
4. EUR-Lex, Regulation (EU) 2022/2065 (Digital Services Act)
5. EUR-Lex, Regulation (EU) 2022/1925 (Digital Markets Act)
6. EUR-Lex, Directive 2000/31/EC (E-commerce Directive)
7. Commission for Consumer Protection (KZP)
8. Court of Justice of the European Union (CURIA)