How to Bring Competition (antitrust) Damages Claims in Bulgaria, Practical Guide (2026)

Last updated: September 2026

Competition damages Bulgaria claims have entered a more mature phase as Bulgarian private enforcement continues to align with the standards set by Directive 2014/104/EU, which was transposed into the Competition Protection Act (CPA) and sharpens the rules on disclosure, passing-on and limitation periods. For in-house counsel, compliance officers and corporate litigators, the practical question is no longer whether private antitrust actions are viable in Bulgaria, they clearly are, but whether, in any given case, the right move is to sue, to settle or to defend. This guide takes a position at every decision point rather than hedging.

It walks through standing, follow-on versus stand-alone strategy, procedural steps, quantification of harm, remedies, limitation and a clear decision framework you can apply immediately.

Why the CPA Framework and EU Context Matter for Competition Damages Bulgaria

Bulgaria operates a civil law system in which competition damages actions are heard by the ordinary civil courts, with a first-instance trial, an appeal, and a possible cassation review before the Supreme Court of Cassation. Administrative infringement findings, by contrast, are made by the Commission for Protection of Competition (CPC) and reviewed separately before the administrative courts. Understanding this dual track is essential because it shapes every strategic choice in a competition damages Bulgaria claim.

Key Features of the CPA Affecting Damages Claims

The Competition Protection Act, as published and amended in the Bulgarian State Gazette, sets out the private-enforcement toolkit. The framework provides a disclosure regime under which claimants can request categories of documents held by defendants and third parties under judicial supervision, addresses the treatment of the passing-on defence, and governs when limitation periods begin to run and when they are suspended. Taken together, these provisions lower some of the practical barriers that historically made stand-alone claims difficult and give follow-on claimants a more predictable route to quantification. For the broader statutory picture, see our Competition Law, Bulgaria overview.

Interaction with EU Law and Directive 2014/104/EU

Bulgarian law does not sit in isolation. The CPA implements Directive 2014/104/EU, the EU antitrust damages directive, which harmonises core principles across member states: the right to full compensation, the binding effect of national competition authority decisions, rules on disclosure of evidence, the recognition of the passing-on defence, and minimum limitation standards. Where the CPA is silent or ambiguous, Bulgarian courts look to the Directive and to the jurisprudence of the Court of Justice of the European Union, which has repeatedly affirmed the effectiveness of private enforcement. The European Commission’s DG Competition also publishes guidance on quantifying harm that Bulgarian practitioners routinely rely on.

The practical effect is that a competition damages Bulgaria claim is anchored in both national procedure and a mature body of EU principle.

Who Can Bring a Competition Damages Claim in Bulgaria

The right to compensation is broad. Any natural or legal person who has suffered harm caused by an infringement of competition law is entitled to claim full compensation, in line with the Directive and CPA framework.

Eligible Plaintiffs

• Direct purchasers. Customers who bought directly from a cartelist or dominant undertaking and paid an overcharge.
• Indirect purchasers. Buyers further down the supply chain to whom an overcharge was passed on; they can claim but must show the overcharge reached them.
• Competitors. Rivals foreclosed, margin-squeezed or excluded by abusive conduct.
• Suppliers and other counterparties. Parties harmed by, for example, buyer cartels or exclusionary purchasing conditions.
• Trade associations and representative bodies. Where the collective-redress framework permits aggregated claims on behalf of affected members.

In every case the claimant must establish an infringement, causation, and a quantifiable loss. The passing-on defence is central: a defendant may argue that a direct purchaser passed the overcharge to its own customers and therefore suffered no net loss. Bulgarian courts, following the Directive and CJEU case law, assess pass-on on the evidence, and the burden of proving pass-on generally rests on the party asserting it.

Collective Redress and Representative Actions

For claimants with individually modest but collectively substantial losses, collective redress mechanisms may allow harm to be aggregated. Bulgaria has transposed Directive (EU) 2020/1828 on representative actions for the protection of consumers, and this remains a developing area. It is often the only economically rational route for large groups of consumers or SMEs. We cover the mechanics, opt-in and opt-out questions and standing of representative bodies in our dedicated guide, Collective redress & representative actions in Bulgarian competition law.

Follow-On vs Stand-Alone Competition Damages Bulgaria Claims

The single most consequential strategic decision at the outset is whether you have, or will soon have, a follow-on claim built on an existing infringement decision, or whether you must run a stand-alone claim and prove the infringement yourself. Our recommendation is unambiguous: if a CPC or European Commission decision exists or is imminent, build the case as a follow-on action and concentrate your resources on quantification. Reserve stand-alone litigation for novel conduct where administrative enforcement is unlikely and you hold strong primary evidence.

Practical Implications for Evidence, Timing, Damages and Costs

A follow-on claim lets you deploy the infringement decision as the spine of your case, so budget and effort shift almost entirely to economic quantification and pass-on rebuttal. A stand-alone claim carries a double burden, infringement plus loss, which multiplies cost, extends the timeline, and lowers the probability of success. The clear commercial recommendation is to time a follow-on claim to follow a CPC or Commission decision wherever feasible, while protecting your position on limitation so the delay does not extinguish the claim.

Procedural Steps and Timeline for Antitrust Litigation Bulgaria

The competition law damages procedure in Bulgaria follows a structured path. Below is the recommended sequence, with the actors responsible at each stage.

Pre-Litigation: Audit, Preservation and Limitation Check

Before filing, conduct an internal audit to confirm exposure and loss, issue litigation-hold and preservation notices to stop the destruction of relevant records, and run a rigorous limitation check. In parallel, produce an early conservative damages estimate. This is the single most valuable phase: it determines whether the claim clears the cost-benefit threshold. In-house counsel lead the preservation exercise; external counsel and an economist validate the loss estimate.

Filing the Claim: Jurisdiction and Pleadings

Competition damages actions are filed before the competent civil court. The statement of claim should plead, at minimum: the infringement (attaching or referencing the CPC/EC decision in a follow-on case); the causal link between the infringement and the claimant’s loss; the quantification of that loss with the methodology relied on; and the remedies sought, including interest and costs. Precision in the pleadings narrows the disclosure battle and signals credibility to the court.

Evidence Gathering and Disclosure Strategy

The CPA disclosure regime allows a claimant to request specified categories of documents from the defendant and third parties under judicial control, subject to proportionality and confidentiality safeguards. Coordinate civil-court disclosure with information available on the CPC file, bearing in mind the protections attaching to leniency statements and settlement submissions, which are generally protected from disclosure. Target the transactional and pricing data an economist will need rather than issuing sweeping, unfocused requests that courts are reluctant to grant.

Interim Measures and Asset Preservation

Where there is a real risk that a defendant will dissipate assets before judgment, apply promptly for interim measures such as attachment or injunctive relief under the Bulgarian Code of Civil Procedure. Timing matters: apply early, with a well-evidenced case, rather than waiting until trial. Interim protection also strengthens your position in any parallel settlement discussion.

Typical Litigation Timeline in Bulgarian Courts

A follow-on competition damages Bulgaria claim, once the infringement decision is final, can move to a quantification-focused trial more quickly than a stand-alone action, which must litigate the underlying conduct in full. Realistically, first-instance proceedings run over many months and often more than a year, with appeal and possible cassation review before the Supreme Court of Cassation adding further time. Build these horizons into the commercial case and into any settlement calculus, because the time value of money and litigation cost accrual materially affect net recovery.

Quantifying Antitrust Harm: Methods, Evidence and Expert Reports

Quantifying antitrust harm is where most competition damages Bulgaria cases are won or lost. The infringement may be established, but the number is contested, and the quality of your economic evidence determines the award. For a full treatment, see our deep dive, How to quantify antitrust damages in Bulgaria, deep dive.

Common Methodologies

• But-for analysis. Reconstructs the price or margin that would have prevailed absent the infringement and compares it to actual outcomes.
• Overcharge estimation. Measures the price uplift attributable to the cartel or abuse, typically the core of purchaser claims.
• Yardstick (comparator) method. Uses comparable markets, periods or firms unaffected by the infringement as a benchmark.
• Econometric modelling and regression. Isolates the infringement effect from other price drivers using statistical techniques.
• Price-cost margin and hedonic regression. Useful where product characteristics or cost structures must be controlled for.

The OECD’s competition work and the European Commission’s guidance on quantifying harm are the recognised reference points for method selection and for defending your approach on cross-examination.

Evidence Bundles

Assemble a coherent evidence bundle early. A typical disclosure request in a competition damages Bulgaria action should seek:

• Sales volumes and unit prices over the infringement and clean periods;
• Cost of goods sold and input cost data;
• Discount, rebate and pricing terms, plus customer-specific arrangements;
• Customer lists and transaction-level records;
• Internal pricing memos, board papers and relevant email correspondence;
• Public filings, market studies and industry reports.

Confidentiality rings and redaction protocols allow sensitive commercial data to be shared with experts while protecting business secrets.

Appointing and Instructing Economists

Instruct an economist at the pre-litigation stage, not on the eve of trial. Define the scope of work, agree standardised data templates so raw records convert efficiently into the model, and require sensitivity analyses that test how the result moves under alternative assumptions. A robust report that survives sensitivity testing is far more persuasive to a Bulgarian court than a single headline figure.

Dealing with Passing-On and Mitigation

Anticipate the passing-on defence from day one. If you act for a direct purchaser, gather evidence on how far, if at all, the overcharge was absorbed rather than passed downstream. If you act for an indirect purchaser, be ready to prove the overcharge reached your level. Address mitigation too, courts will discount losses the claimant could reasonably have avoided.

Remedies, Damages Types and Calculation Mechanics

Bulgarian law, consistent with the Directive’s full-compensation principle, aims to place the injured party in the position it would have occupied absent the infringement.

Recoverable Heads of Loss

• Actual loss (damnum emergens). The overcharge or direct financial harm suffered.
• Loss of profit (lucrum cessans). Profits foregone, particularly relevant for foreclosed competitors.
• Interest. Accruing to compensate for the passage of time between harm and payment.
• Legal costs. Recoverable in accordance with Bulgarian procedural rules, subject to the court’s assessment.

Non-Recoverable Items

Administrative fines imposed by the CPC or the Commission are penalties, not compensatory damages, and cannot be claimed by a private plaintiff. Damages are compensatory, not punitive; the goal is full compensation for actual harm, not a windfall.

Post-Judgment Enforcement

A Bulgarian judgment is enforceable domestically through the ordinary enforcement machinery, and within the EU it benefits from the mutual recognition and enforcement framework (notably Regulation (EU) No 1215/2012, the Brussels I Recast Regulation), which matters where the defendant’s assets sit in another member state. Factor cross-border enforcement into the decision to litigate against a foreign-domiciled defendant.

Calculation Starting Point

Begin from the gross overcharge or lost profit, then adjust for pass-on and mitigation, and finally add interest to the date of payment. Because outcomes are highly fact-specific, the disciplined approach is to model a conservative central figure with a defensible range rather than to anchor on an optimistic single number.

Litigation Strategy, Settlement and Limitation Periods

This is the section where a clear position matters most. Litigation is a means, not an end; the objective is the best risk-adjusted commercial outcome.

Settlement Negotiation Tactics

Where you hold a strong follow-on claim, use the infringement decision as leverage to anchor negotiations high. In practice, many claimants will accept a discount to a conservatively quantified recoverable figure, net of expected costs, in return for prompt and certain resolution, the appropriate range depends on the strength of the evidence and the residual litigation risk. Structured settlements, confidentiality terms and the preservation of ongoing commercial relationships are legitimate value drivers that can justify accepting a discount.

When to Defend, When to Settle, When to Sue

• Bring the claim when: there is a clear CPC or EC infringement decision or strong prima facie evidence; the loss is demonstrable, quantifiable and likely to exceed litigation costs; the evidence is collectible; the limitation period is unexpired; and your appetite for disclosure and possible counterclaims is acceptable.
• Settle when: the defendant’s offer, net of costs and risk, compares favourably with the expected court outcome; confidentiality or continuing business relations carry real value; or the probability of success is genuinely uncertain because the expert evidence is mixed.
• Defend or oppose when: passing-on materially weakens the claimant’s net loss; the limitation period has expired; the documentary record favours the defendant; or the cost of settling exceeds the expected court award net of costs and interest.

For defendants, our Defending competition damages claims in Bulgaria, defence playbook sets out these tactics in detail.

Limitation Periods Under the CPA

Limitation is decisive and must be checked before anything else. Under the CPA framework, aligned with the Directive, the limitation period runs from when the claimant knew or could reasonably be expected to know of the infringement, the harm and the identity of the infringer, and it does not run while the infringement continues. The period is suspended during a competition authority investigation and for a defined window after a decision becomes final, and it may be suspended during consensual dispute resolution. The practical takeaway is to obtain a definitive limitation opinion early, a strong claim on the merits is worthless if it is time-barred.

Practical Checklists and Sample Litigation Timeline

Ten-Step Pre-Litigation Checklist

1. Identify the suspected infringement and any existing CPC or EC decision.
2. Issue litigation-hold and evidence-preservation notices internally.
3. Run a definitive limitation and tolling analysis.
4. Map the affected transactions and quantify preliminary exposure.
5. Instruct an economist for an early loss estimate and range.
6. Assess the passing-on and mitigation risk to your net figure.
7. Decide follow-on versus stand-alone strategy.
8. Draft targeted disclosure requests aligned to the economic model.
9. Model expected value against litigation cost to test the sue/settle threshold.
10. Set a settlement posture and walk-away number before filing.

Sample Six-Month Opening Timeline

• Month 1: Internal audit, preservation notices, limitation opinion.
• Month 2: Economist engaged, preliminary loss estimate, strategy decision.
• Month 3: Pleadings drafted and claim filed; interim measures if needed.
• Month 4: Disclosure requests served and contested.
• Month 5: Data received, expert report prepared, sensitivity analyses run.
• Month 6: Expert exchange and structured settlement discussions before trial preparation.

Conclusion and Next Steps for Business

A competition damages Bulgaria claim is a genuine commercial opportunity or a serious defensive risk, depending on which side of the transaction you sit, but in every case it should be driven by a clear-eyed decision framework rather than instinct. Bring the claim when the infringement is established, the loss is quantifiable and net of costs, and the limitation clock is still running; settle when a defendant’s offer compares favourably with the expected net court outcome or when confidentiality and relationships carry real value; and defend when pass-on, limitation or the documentary record shifts the expected value in your favour.

The immediate practical steps are the same regardless of posture: audit your exposure, preserve records now, obtain a limitation opinion, instruct an economist early, and fix your settlement position before you file. To move forward, review the GLE Bulgaria competition practice area and contact a listed competition lawyer in Bulgaria through the Global Law Experts directory.

Sources

1. Commission for Protection of Competition (Bulgaria)
2. Bulgarian State Gazette (Darzhaven Vestnik)
3. EUR-Lex, Directive 2014/104/EU (antitrust damages)
4. European Commission, DG Competition
5. Court of Justice of the European Union (Curia)
6. Supreme Court of Cassation (Bulgaria)
7. OECD Competition, reports and best practice