1. Introduction

The construction industry is particularly vulnerable to cartelisation because projects are frequently awarded through public or private tenders, the number of credible contractors can be limited, projects are geographically segmented, and competitors often possess detailed knowledge of one another's costs and bidding strategies.

Construction cartels commonly involve:

• bid rigging;
• cover pricing;
• allocation of contracts or geographic territories;
• customer allocation;
• price fixing;
• exchange of confidential tender information;
• rotation of successful bidders;
• compensation payments between competitors;
• suppression of competition in public procurement; and
• coordination through trade associations or informal meetings.

Global enforcement demonstrates a consistent principle: competitors cannot manipulate the competitive tendering process merely because the final prices are not expressly identical. An agreement to submit deliberately losing bids can itself constitute a serious cartel infringement.

The CMA's English construction investigations, for example, have involved extensive cover-pricing arrangements, while the European elevator cartel involved allocation of public and private tenders across several Member States.

2. Legal Framework

A. United States

The principal provision is Section 1 of the Sherman Act, which prohibits agreements that unreasonably restrain interstate commerce.

Bid rigging is ordinarily treated as a per se unlawful agreement, because competitors are directly replacing independent bidding with coordinated conduct.

Typical evidence includes:

• communications between contractors;
• allocation of projects;
• predetermined winning bidders;
• deliberately inflated bids;
• complementary bids;
• payment or compensation arrangements; and
• repeated patterns across tenders.

B. European Union

The principal provision is Article 101 TFEU.

Construction cartels may constitute:

• agreements restricting competition by object;
• market-sharing arrangements;
• price fixing;
• customer allocation;
• tender allocation;
• information exchanges; and
• coordinated bidding.

Article 101 enforcement is particularly important because construction companies can participate in projects spanning several Member States.

The EU elevator investigation, for example, found arrangements involving tender allocation, market sharing, price fixing and information exchange in Belgium, Germany, Luxembourg and the Netherlands.

C. United Kingdom

The relevant domestic framework is principally Chapter I of the Competition Act 1998.

The UK's construction enforcement experience is particularly significant. In the major 2009 construction investigation, the OFT found that 103 construction firms had participated in unlawful bid-rigging involving 199 tenders, predominantly through cover pricing.

3. Major Global Construction Cartel Cases

Case 1: United States v Broce Construction Co., 488 U.S. 563 (1989)

Facts

Broce Construction involved a longstanding conspiracy among Kansas highway construction contractors.

The indictment alleged that contractors:

• designated the successful bidder;
• submitted intentionally high or complementary bids;
• discussed prospective bids;
• submitted noncompetitive bids; and
• used payments or other consideration to induce contractors to submit rigged bids.

The Supreme Court record expressly described the conduct as involving collusive and rigged bids for a Kansas public highway construction project.

Legal issue

The case primarily concerned the constitutional consequences of separate prosecutions arising from a continuing conspiracy.

Decision

The Supreme Court rejected the defendants' double-jeopardy argument because the indictments charged separate offences relating to separate projects.

Importance for construction cartels

The case demonstrates an important enforcement principle:

A continuing construction cartel does not necessarily immunise individual bid-rigging transactions from separate prosecution.

The fact that contractors operate under a broader cartel arrangement does not convert every tender into one indivisible offence.

Principle

Each manipulated construction tender can generate independent antitrust consequences even when it forms part of a larger cartel.

4. OFT Construction Industry in England: Bid-Rigging (2009)

This is one of the most important construction-cartel enforcement episodes in the United Kingdom.

The OFT found that 103 construction firms had engaged in bid rigging concerning 199 tenders between 2000 and 2006. The dominant technique was cover pricing. The total penalties were approximately £129.2 million.

What was cover pricing?

A contractor that did not genuinely intend to win would submit an artificially high bid so that another contractor could win.

The purpose was to create the appearance of competition while avoiding genuine price competition.

Why was this unlawful?

The tendering customer believed that:

• multiple contractors were independently competing;
• the submitted prices represented genuine commercial judgments; and
• the lowest bid reflected genuine market competition.

Those assumptions were false.

Legal significance

The case established the seriousness with which UK competition authorities treat manipulation of tender processes.

It also demonstrated that:

Bid rigging does not require an agreement to fix one identical price.

An agreement to coordinate which contractor wins can itself restrict competition.

5. G F Tomlinson Building Ltd v OFT, [2011] CAT 7

This case arose from the same major English construction bid-rigging investigation.

The Competition Appeal Tribunal considered appeals by several construction companies against the OFT's decision.

The Tribunal confirmed that the companies had been found to have participated in cover pricing contrary to Chapter I of the Competition Act 1998.

Key issue

The appeals raised questions concerning:

• liability;
• evidence;
• classification of cover pricing;
• seriousness of infringement; and
• calculation of penalties.

Significance

The litigation is important because it demonstrates that construction-cartel enforcement does not end with the competition authority's administrative decision.

Construction companies can challenge:

1. whether an agreement existed;
2. whether the evidence proves participation;
3. whether the conduct constituted an infringement; and
4. whether the penalty was properly calculated.

Principle

Construction-cartel enforcement requires both substantive proof of collusion and legally defensible penalty assessment.

6. North Midland Construction PLC v OFT, [2011] CAT 14

Another appeal from the English construction bid-rigging investigation was North Midland Construction PLC v OFT.

The OFT had imposed a penalty of approximately £1.54 million on North Midland for two alleged instances of cover pricing.

The Tribunal found that, for one alleged infringement, the OFT had not established the infringement on the balance of probabilities.

Importance

This case is particularly valuable because it illustrates the other side of cartel enforcement.

Competition authorities have strong enforcement powers, but they must still establish:

• the relevant conduct;
• the company's participation;
• the evidentiary connection between the company and the cartel;
• the existence of the alleged infringement; and
• an appropriate penalty.

Principle

A construction cartel may be obvious at an industry level, but liability must still be established against each individual undertaking.

This is particularly important where enforcement authorities rely on:

• circumstantial evidence;
• tender patterns;
• employee communications;
• third-party evidence; or
• inference from suspicious bidding behaviour.

7. Quarmby Construction Co Ltd v OFT, [2011] CAT 11

Quarmby Construction was another appeal arising from the English construction bid-rigging investigation.

The companies challenged both liability and penalties. The Tribunal rejected the liability challenges and upheld the finding of infringement in the relevant respects.

Importance

The case demonstrates that cover pricing can constitute an unlawful restriction even where the contractor submitting the cover price does not actually expect to win the tender.

This is commercially important.

A construction company might argue:

"We never intended to win, so the customer was not actually deprived of our competitive bid."

Competition law takes a different approach.

The relevant harm lies in the elimination of independent competitive uncertainty.

Principle

A sham bid can damage competition even where it was never intended to be successful.

8. United Kingdom Construction Demolition and Asbestos Cartel — CMA, 2023

The CMA's modern construction enforcement provides an especially clear illustration of contemporary bid-rigging enforcement.

In March 2023, the CMA fined 10 construction firms nearly £60 million for bid rigging involving demolition and asbestos-removal contracts.

The conduct concerned 19 contracts worth more than £150 million.

The affected projects included major public and private projects such as:

• the Metropolitan Police Training College;
• Bow Street Magistrates' Court;
• Selfridges; and
• Oxford University. 

Conduct

The firms agreed to manipulate bids so that certain companies would win.

Other firms would submit bids deliberately designed to lose.

The CMA characterised this as cover bidding.

Enforcement consequences

The CMA imposed:

• substantial corporate fines;
• settlement discounts for cooperating parties; and
• director disqualifications.

Three directors were disqualified in connection with the enforcement.

Principle

Modern construction cartel enforcement increasingly combines:

corporate penalties + individual accountability + leniency + settlement mechanisms.

9. Vp plc, MGF and Mabey Hire — UK Groundworks Products Cartel

The CMA's groundworks investigation concerned suppliers of products used in construction.

The CMA found that Vp plc, MGF and Mabey Hire had illegally coordinated their commercial behaviour.

The conduct included coordination concerning pricing and exchange of commercially sensitive information.

Vp and MGF received fines exceeding £15 million in total, while Mabey avoided a fine because it disclosed the conduct and cooperated under the CMA's leniency programme.

Why this case matters

This demonstrates that construction-cartel enforcement is not restricted to the final construction contract.

Competition authorities can intervene at the upstream supply level.

Thus, cartel exposure can arise among:

• contractors;
• subcontractors;
• equipment suppliers;
• concrete suppliers;
• groundworks suppliers;
• materials manufacturers; and
• specialist service providers.

Principle

Construction competition law extends throughout the construction supply chain.

10. UK Concrete Companies Cartel

The CMA investigated three concrete companies involved in the supply of precast concrete drainage products.

The companies:

• coordinated prices;
• allocated customers;
• shared commercially sensitive information; and
• divided the market.

The products were important to road, rail and infrastructure projects.

The companies were fined approximately £36 million, and directors faced disqualification consequences.

Significance

This case illustrates the relationship between construction inputs and infrastructure procurement.

A cartel involving apparently specialised construction materials can ultimately affect:

• roads;
• railways;
• public infrastructure;
• utilities; and
• government procurement.

Principle

Competition authorities examine upstream construction-material markets because cartelisation can indirectly inflate the cost of infrastructure projects.

11. Elevators and Escalators — European Commission / Court of Justice

The European elevator cartel is one of the most important European construction-related cartel cases.

The European Commission investigated major elevator manufacturers including:

• Otis;
• Kone;
• Schindler; and
• ThyssenKrupp.

The cartel involved Belgium, Germany, Luxembourg and the Netherlands.

Conduct

The companies were found to have:

• allocated tenders;
• allocated contracts;
• shared markets;
• fixed prices;
• exchanged sales and price information;
• allocated maintenance contracts; and
• coordinated modernization contracts.

They also used a compensation mechanism in certain circumstances.

Why it is important

The cartel extended beyond initial construction.

It also concerned:

• installation;
• maintenance;
• modernization; and
• existing customer relationships.

Therefore, cartelisation can occur across the entire lifecycle of construction-related infrastructure equipment.

Principle

Competition law protects competition not merely at the moment of initial construction but throughout installation, maintenance and modernization markets.

12. FL und KM Baugesellschaft and S AG, Case C-2/23, CJEU (2025)

This is a particularly important recent European construction-related case.

The underlying proceedings involved construction companies suspected of repeatedly participating in public procurement procedures pursuant to unlawful agreements designed to induce contracting authorities to accept particular bids.

The case reached the Court of Justice in connection with questions surrounding:

• Article 101 TFEU;
• leniency;
• settlement submissions;
• criminal investigations;
• access to cartel evidence; and
• cooperation between competition and criminal-enforcement authorities.

The CJEU delivered judgment on 30 October 2025.

Importance for construction-cartel enforcement

The case demonstrates the increasingly sophisticated character of cartel enforcement.

A construction cartel can generate parallel consequences under:

1. competition law;
2. procurement law;
3. criminal law;
4. damages actions; and
5. leniency regimes.

The Court emphasised the need to preserve the effectiveness of leniency and settlement systems while allowing appropriate cooperation between enforcement authorities.

Principle

Effective cartel enforcement requires coordination between competition, procurement and criminal-enforcement systems without destroying incentives for cartel participants to cooperate.

13. Saitama Saturday Club Case — Japan

Japan provides another important construction-sector example.

The Saitama Saturday Club case concerned construction companies that had engaged in bid rigging involving public works in Saitama Prefecture.

The conduct involved construction companies coordinating bids for public projects in violation of Japan's Antimonopoly Act.

Significance

The case became particularly important because public reaction to the relatively limited initial enforcement contributed to:

• greater public awareness;
• private damages actions;
• stronger competition enforcement;
• increased attention to public procurement;
• tougher penalties; and
• reforms to competitive bidding mechanisms.

It subsequently became an important reference point in Japan's development of more vigorous bid-rigging enforcement.

Principle

Construction-cartel enforcement is not simply an economic issue; bid rigging can undermine public confidence in government procurement.

14. Swiss Construction Cartel — Aargau

Switzerland provides another major construction-sector example.

In 2011, COMCO fined 17 construction companies in the Aargau region for unlawful agreements involving prices and market allocation.

The investigation identified bid rigging affecting at least 100 projects between 2006 and 2009, with total fines of approximately CHF 4 million.

Importance of leniency

Seven companies applied for leniency.

The first company to voluntarily disclose information obtained a 100% reduction, while others received substantial reductions.

Principle

The case demonstrates the value of:

dawn raids + leniency + evidence gathering + coordinated enforcement.

It also shows why cartel members have a strategic incentive to approach competition authorities before competitors do.

15. Common Patterns in Global Construction Cartels

16. Why Construction Cartels Are Particularly Serious

A. Public money

Construction projects frequently involve:

• government infrastructure;
• hospitals;
• universities;
• roads;
• railways;
• airports;
• housing; and
• public utilities.

Consequently, cartel overcharges can ultimately be borne by taxpayers.

B. Large contract values

A single infrastructure tender may be worth millions or billions.

Even a relatively small percentage overcharge can therefore produce substantial economic harm.

C. Repeated interaction

Construction companies often encounter the same competitors repeatedly.

This creates opportunities for:

• bid rotation;
• reciprocal allocation;
• informal understandings; and
• repeated cover pricing.

D. Local concentration

Certain specialised construction markets may have only a small number of credible suppliers.

This makes coordination easier to sustain.

E. Information asymmetry

Procurement authorities may not immediately recognise that a bid is artificial.

A tender can therefore appear competitive even though competitors have secretly coordinated.

17. Evidence Used by Competition Authorities

Authorities increasingly rely on a combination of direct and circumstantial evidence.

Direct evidence

Examples include:

• emails;
• WhatsApp or other messages;
• meeting records;
• cartel agreements;
• spreadsheets;
• bid-allocation schedules;
• internal documents; and
• admissions.

Circumstantial evidence

Authorities may examine:

• identical or suspicious bid patterns;
• unusually consistent margins;
• repeated winning patterns;
• unexplained withdrawal from tenders;
• identical errors in bids;
• suspicious communications immediately before tenders;
• geographic allocation patterns; and
• unexplained subcontracting arrangements.

The English construction cases demonstrate why evidence must ultimately be assessed against each individual undertaking rather than simply assuming that every participant in an industry-wide investigation is liable. North Midland Construction is particularly instructive on this point.

18. Leniency and Settlement

Modern cartel enforcement strongly encourages the first participant to disclose the cartel.

The logic is straightforward:

If the first cartel member can obtain immunity or a substantial reduction, cartel participants have an incentive to betray the cartel before another participant does.

This approach is evident in the UK groundworks investigation, where Mabey avoided a fine after bringing the conduct to the CMA and cooperating, and in the Swiss construction cartel, where the first cooperating firm obtained complete fine reduction.

The EU's recent FL und KM Baugesellschaft judgment also demonstrates the importance of protecting the effectiveness of leniency programmes when competition authorities cooperate with other enforcement bodies.

19. Individual Liability

Construction-cartel enforcement increasingly extends beyond corporations.

Potential consequences include:

• director disqualification;
• criminal prosecution in jurisdictions permitting criminal cartel enforcement;
• personal fines;
• exclusion from public procurement;
• professional consequences; and
• damages liability.

The CMA's demolition and asbestos cartel produced director disqualifications alongside the corporate fines.

Thus, corporate executives cannot necessarily treat cartel conduct as merely a corporate financial risk.

20. Public Procurement Consequences

A construction cartel may trigger consequences beyond competition law.

Potential consequences include:

Competition-law penalties

Fines based on turnover and seriousness.

Procurement exclusion

Contracting authorities may consider whether a supplier has engaged in serious professional or competition-law misconduct, subject to the applicable procurement regime.

Damages

Government agencies, private developers or other customers may seek compensation.

Contractual consequences

Contracts may contain provisions allowing termination or recovery following unlawful conduct.

Criminal consequences

Certain jurisdictions permit criminal prosecution of individuals involved in serious bid rigging.

Reputation

A cartel finding can substantially damage a contractor's ability to compete for future projects.

21. Emerging Issues

Construction cartel enforcement is increasingly affected by technology.

A. Algorithmic bidding

AI systems may recommend:

• bid prices;
• tender participation;
• competitor responses; and
• market allocation.

The central question becomes whether automated coordination can constitute a cartel even without an explicit human agreement.

B. Digital procurement platforms

Centralised procurement platforms create large databases of:

• historical prices;
• contractor participation;
• bid timing;
• winning percentages; and
• tender outcomes.

These systems can assist enforcement but can also facilitate coordination if competitors obtain sensitive information.

C. Predictive pricing

If competing contractors use systems trained on competitors' historical bids, regulators may investigate whether the resulting behaviour facilitates conscious parallelism or unlawful coordination.

D. Subcontracting networks

Digital construction ecosystems can make it easier to identify relationships among prime contractors and subcontractors that might conceal compensation mechanisms.

22. Comparative Case-Law Principles

23. Overall Legal Principles

The global construction cases establish several common propositions.

1. Bid rigging is a hardcore restriction

Authorities generally treat deliberate coordination of tender outcomes as one of the most serious forms of cartel conduct.

2. Cover pricing is not harmless

Submitting a deliberately losing bid can itself undermine genuine competition.

3. Public procurement receives heightened protection

Because taxpayers ultimately fund many construction projects, authorities are particularly concerned with manipulation of public tenders.

4. Cartels can operate at every supply-chain level

The infringement may occur between:

developers → prime contractors → subcontractors → equipment suppliers → materials suppliers.

5. Evidence must be undertaking-specific

Industry-wide suspicion is insufficient; the authority must establish the relevant company's participation, as illustrated by North Midland Construction.

6. Leniency is a central enforcement weapon

The prospect of immunity or reduced penalties encourages cartel participants to disclose the arrangement.

7. Enforcement is increasingly personal

Directors and executives can face consequences in addition to corporate penalties.

8. Cross-border cooperation is increasingly important

Large construction groups frequently operate internationally, making cooperation among competition authorities increasingly necessary.

24. Conclusion

Global construction-cartel enforcement shows a remarkably consistent international approach: competition law protects the integrity of the tendering process itself.

The most significant construction cartel mechanisms—cover pricing, bid allocation, market sharing, price coordination, customer allocation and information exchange—replace independent competitive decision-making with collective control.

The US Broce Construction litigation demonstrates the criminal-antitrust consequences of highway bid rigging; the UK's extensive OFT/CMA cases demonstrate the seriousness of cover pricing and modern bid manipulation; the EU elevator cartel illustrates cross-border construction-equipment coordination; Japan's Saitama experience shows the wider public consequences of procurement cartels; Switzerland demonstrates the effectiveness of leniency; and the recent FL und KM Baugesellschaft judgment shows how contemporary enforcement is increasingly connected with criminal investigations, leniency evidence and cross-border institutional cooperation.

The central rule emerging from these cases is therefore: a construction company must make its tendering decisions independently. Any agreement or coordinated practice that substitutes cartel-controlled bidding for genuine competitive bidding can expose the participants to substantial fines, individual sanctions, procurement consequences and damages claims.