Competition Law and Accommodation Platform Competition Concerns

1. Introduction

Accommodation platforms—such as online hotel-booking platforms, online travel agencies (OTAs), and short-term accommodation marketplaces—act as intermediaries between accommodation providers and consumers. Their services can create efficiencies by allowing consumers to compare properties, prices, availability and conditions in one place, while giving hotels and other accommodation providers access to a large customer base.

Competition-law concerns arise when a platform's contractual terms, pricing rules, ranking systems, data practices, or use of market power reduce competition between platforms or restrict accommodation providers' ability to compete through different channels. European enforcement has particularly focused on price-parity or most-favoured-nation (MFN) clauses. The EU Court of Justice's 2024 Booking.com judgment is an important recent authority: it held that price-parity clauses cannot, in principle, automatically be treated as ancillary restraints outside Article 101 TFEU.

2. Main Competition Concerns

A. Price-Parity / MFN Clauses

A price-parity clause requires an accommodation provider to maintain certain prices or conditions on the platform in comparison with other sales channels.

Two principal forms are:

Wide parity clause:
The hotel cannot offer a lower price on:

• another accommodation platform;
• its own website;
• offline/direct channels; or
• another distribution channel.

Narrow parity clause:
The hotel may offer a lower price on competing platforms but cannot offer a lower price through its own website.

The competition concern is that such clauses can reduce the ability of accommodation providers to use different prices to compete for customers through different platforms. German competition authorities specifically identified risks to both platform competition and hotel-level competition.

B. Foreclosure of Smaller Platforms

Large accommodation platforms may benefit from:

• large consumer networks;
• extensive hotel inventories;
• accumulated booking data;
• strong brand recognition;
• sophisticated search and recommendation systems; and
• substantial marketing resources.

A parity clause can make entry more difficult because a new platform may be unable to attract customers through lower accommodation prices if hotels cannot offer lower prices on that new platform.

The French competition authority expressly identified the risk that parity clauses could foreclose smaller or newly entering booking platforms.

C. Commission and Platform Dependence

Platforms normally charge accommodation providers a commission for bookings.

Competition concerns can arise where a platform becomes sufficiently important that hotels feel commercially compelled to remain listed even if:

• commissions increase;
• contractual conditions become less favourable;
• alternative platforms offer lower commissions; or
• direct booking would otherwise be attractive.

The French authority noted that the importance of online booking platforms could give a leading platform substantial negotiating significance for hotels.

D. Ranking and Self-Preferencing

Accommodation platforms normally determine the order in which properties appear in search results.

Competition issues can arise where ranking is influenced by factors such as:

• commission paid;
• advertising payments;
• preferred-partner status;
• platform incentives;
• commercial agreements; or
• the platform's own commercial interests.

The UK CMA investigated accommodation-booking practices concerning the relationship between commission and search ranking, alongside other practices affecting consumers.

Where a platform also operates accommodation services or affiliated businesses, additional questions may arise concerning self-preferencing and discriminatory treatment of rivals.

E. Data Advantages

Large platforms may accumulate information concerning:

• room prices;
• occupancy;
• consumer searches;
• booking patterns;
• cancellations;
• demand by location;
• consumer preferences; and
• accommodation performance.

Access to such data can create competitive advantages. Competition analysis may therefore consider whether an incumbent platform uses data in a manner that disadvantages competing accommodation providers or rival platforms.

F. Network Effects

Accommodation platforms benefit from indirect network effects:

More accommodation providers → more consumer choice → more consumers → greater value for accommodation providers.

These effects can reinforce an established platform's position.

The concern is not simply that a platform is large. The legal question is whether its conduct makes it unnecessarily difficult for competing platforms to attract accommodation providers or consumers.

G. Exclusive or Preferential Agreements

Competition concerns may arise where a platform requires accommodation providers to:

• list exclusively on one platform;
• provide superior inventory exclusively;
• provide preferential room availability;
• accept restrictive distribution conditions; or
• give one platform preferential access to customers or data.

The competitive assessment depends on factors such as market share, duration, coverage, switching possibilities and the availability of alternative channels.

H. Algorithmic Pricing and Coordination

Accommodation platforms can create competition-law questions when pricing algorithms interact with:

• competitors' prices;
• hotel pricing systems;
• platform recommendations;
• automated repricing;
• contractual price restrictions.

The important distinction is between legitimate independent algorithmic pricing and conduct that facilitates coordination or restricts independent price competition.

3. Relevant Competition-Law Framework

Article 101 TFEU

In the EU, Article 101 TFEU prohibits agreements and concerted practices that have as their object or effect the prevention, restriction or distortion of competition and that affect trade between Member States.

Accommodation-platform agreements with hotels can therefore be examined as vertical agreements.

Article 102 TFEU

Article 102 becomes relevant where an accommodation platform has a dominant position and engages in abusive conduct.

Potential theories may include:

• exclusionary contractual conditions;
• discriminatory treatment;
• tying or bundling;
• refusal to provide access in appropriate circumstances;
• exploitative practices; and
• conduct that forecloses competing platforms.

Dominance itself is not prohibited; the focus is on abusive conduct by a dominant undertaking.

Relevant-Market Definition

The relevant market may involve questions such as:

1. Is the relevant market online accommodation intermediation?
2. Should direct hotel booking be included?
3. Should hotel accommodation itself constitute a separate market?
4. Should short-term rental platforms be considered substitutes?
5. Should different accommodation categories be separated?

The answer depends on the competitive constraints demonstrated by evidence rather than simply on the names of the businesses.

The CJEU's 2024 Booking.com judgment specifically discussed relevant-market definition in connection with the application of EU vertical-agreement rules.

4. Important Case Laws

Case 1 — HRS v Bundeskartellamt / HRS Best-Price Clauses

Authority: Bundeskartellamt and Düsseldorf Higher Regional Court
Jurisdiction: Germany
Year: 2015

HRS used contractual "best price" clauses requiring hotels to provide HRS with their lowest prices and favourable conditions.

The Bundeskartellamt prohibited the practice. The Düsseldorf Higher Regional Court confirmed the authority's decision in January 2015.

The authority considered that the clauses restricted competition between hotel-booking platforms and made market entry by new platforms more difficult.

Legal significance

The case became an important European reference point for analysing MFN/parity clauses in online accommodation distribution.

Case 2 — Booking.com / Bundeskartellamt — Narrow Parity

Authority: Bundeskartellamt
Jurisdiction: Germany
Year: 2015

After the HRS decision, Booking.com changed from a wide parity clause to a narrower clause.

Under the narrow clause, hotels could offer lower prices through competing hotel platforms but were restricted from offering lower prices on their own websites.

The Bundeskartellamt nevertheless prohibited the narrow clause in December 2015. It considered that the clause could restrict competition between platforms and limit hotels' pricing freedom on their direct channels.

Legal significance

The case demonstrated that changing a wide MFN into a narrow MFN does not automatically remove competition concerns.

Case 3 — Booking.com and Booking.com (Deutschland) v 25hours Hotel Company and Others, C-264/23

Court: Court of Justice of the European Union
Year: 2024

This is one of the most important recent cases.

The CJEU examined Booking.com's price-parity clauses under Article 101 TFEU.

The Court held that price-parity clauses cannot, in principle, be classified as ancillary restraints merely because they accompany the operation of an online accommodation-reservation platform.

The Court also considered whether the clauses could qualify for exemption under the applicable vertical-agreement framework.

Legal significance

The decision establishes that a platform cannot simply argue:

"The parity clause is necessary for operating the booking platform."

The restriction must independently satisfy the applicable competition-law requirements.

The Court also recognised that online reservation platforms can create efficiencies by improving consumer comparison and giving accommodation providers broader visibility.

Case 4 — Booking.com / France, Italy and Sweden

Authorities: French, Italian and Swedish competition authorities
Year: 2015

Competition authorities in France, Italy and Sweden accepted commitments from Booking.com concerning its parity clauses.

The French authority stated that Booking.com's commitments limited the use of price parity and increased hotels' freedom to differentiate their offers.

The Italian Competition Authority similarly investigated Booking.com and Expedia concerning MFN clauses and accepted binding commitments from Booking.com.

Legal significance

This was important because it showed coordinated European enforcement against similar contractual restrictions.

It also demonstrated the difference between:

• wide parity, and
• modified arrangements intended to give hotels greater pricing freedom.

Case 5 — UK Hotel Online Booking Investigation: Booking.com, Expedia and IHG

Authority: UK Office of Fair Trading/CMA
Case: CE/9320-10
Jurisdiction: United Kingdom

The UK investigation concerned arrangements involving:

• Booking.com;
• Expedia; and
• InterContinental Hotels Group (IHG).

The investigation examined restrictions affecting the ability of online travel agents to discount hotel room prices.

Commitments were accepted in 2014, but the Competition Appeal Tribunal later quashed the commitments decision and remitted the matter. The CMA subsequently closed the investigation in 2015 on administrative-priority grounds and expressly stated that it had not determined that the Competition Act or TFEU had been infringed.

Legal significance

This case is particularly useful because it demonstrates that:

an investigation or competition concern does not itself establish an infringement.

It also illustrates the importance of commitments and changing market conditions in digital-platform cases.

Case 6 — UK CMA Monitoring of Booking.com and Expedia

Authority: UK CMA
Period: 2015–2020

Following the European investigations, Booking.com and Expedia removed certain wide parity restrictions.

The CMA subsequently monitored the market. In 2020, both platforms confirmed that hotels remained free to offer different prices, terms and availability through other OTAs.

Legal significance

The case demonstrates the importance of post-remedy monitoring in platform markets.

A competition authority may not simply examine a contractual restriction once; it may also examine how market conditions develop after the restriction is modified.

Case 7 — CMA Online Hotel Booking Practices

Authority: UK Competition and Markets Authority
Period: 2017–2019

The CMA investigated several online accommodation-booking platforms, including Booking.com, Expedia, Agoda, Hotels.com, ebookers and trivago.

Although this investigation principally involved consumer protection law rather than a competition-law infringement decision, it is relevant to the broader regulation of accommodation platforms.

The CMA examined practices involving:

• search-result rankings;
• commission-related ranking;
• scarcity messages;
• discount claims;
• hidden charges; and
• pressure-selling techniques.

Several platforms provided undertakings and the CMA established sector-wide compliance principles.

Legal significance

Platform competition and consumer protection can overlap. For example, opaque ranking systems can affect both consumer choice and competitive conditions among accommodation providers.

5. Wide vs Narrow Parity

The 2024 CJEU judgment is particularly important because it rejected the idea that parity clauses automatically fall outside Article 101 merely because they support the platform's main activity.

6. Accommodation Platforms and Dominance

If an accommodation platform becomes dominant, the analysis can move beyond Article 101 toward Article 102 TFEU.

Authorities may examine whether the platform:

1. Excludes competitors

For example, by imposing conditions that make it commercially difficult for hotels to use rival platforms.

2. Discriminates

For example, treating comparable accommodation providers differently without objective justification.

3. Uses contractual restrictions

Long-term or broad contractual restrictions may make market entry more difficult.

4. Controls an important gateway

A platform may become an important access point between hotels and consumers.

5. Uses data strategically

The platform may possess extensive information unavailable to smaller competitors.

7. Network Effects and Market Power

Accommodation platforms have a distinctive economic structure.

Hotels → Platform → Consumers

If many hotels join:

→ consumers have greater choice.

If many consumers join:

→ hotels have greater incentives to join.

This creates a feedback loop:

More hotels → more consumers → more hotels → stronger platform position

Network effects can therefore make established platforms difficult to challenge.

However, network effects alone do not establish unlawful dominance. Competition authorities must examine market definition, market power, barriers to entry, switching possibilities and the actual conduct involved.

8. Competition Concerns in Ranking Algorithms

Ranking is increasingly important because consumers may not examine every accommodation listing.

Potential issues include:

• paid placement;
• commission-based ranking;
• preferential treatment;
• undisclosed commercial relationships;
• manipulation of visibility;
• self-preferencing;
• differential access to data.

The UK CMA's accommodation-platform investigation specifically examined how commission payments could influence search-result ranking.

A competition-law assessment would need to distinguish between ordinary commercial ranking and ranking conduct that unlawfully disadvantages competitors or exploits market power.

9. Consumer Benefits vs Competition Risks

Accommodation platforms can generate substantial benefits:

• easier price comparison;
• greater accommodation visibility;
• lower search costs;
• broader consumer choice;
• easier international bookings;
• improved occupancy opportunities for accommodation providers.

The CJEU recognised these efficiency benefits in its Booking.com judgment.

At the same time, restrictions imposed by platforms may:

• reduce price competition;
• increase barriers to entry;
• reduce hotels' negotiating freedom;
• weaken competition between platforms;
• reinforce network effects.

Therefore, competition law generally requires examination of both the competitive harm and claimed efficiencies.

10. Key Legal Questions for an Accommodation Platform

A competition-law investigation would normally ask:

1. What is the relevant product market?
2. What is the geographic market?
3. How many accommodation platforms compete?
4. What is the platform's market position?
5. Are hotels able to switch easily?
6. Can hotels use multiple platforms?
7. Does the platform impose parity clauses?
8. Are those clauses wide or narrow?
9. Are there exclusivity obligations?
10. How are search results determined?
11. Does commission affect ranking?
12. Does the platform discriminate between accommodation providers?
13. Does it self-preference its own services?
14. What data does it control?
15. Can rival platforms access necessary information?
16. Are there significant network effects?
17. Are entry barriers substantial?
18. Do contractual restrictions foreclose rivals?
19. Are claimed efficiencies verifiable?
20. Are restrictions necessary and proportionate to achieving those efficiencies?

11. Overall Legal Position

The major European accommodation-platform cases show a progression from traditional MFN/parity-clause enforcement toward a broader examination of digital-platform competition.

The central issues are:

Platform power → contractual restrictions → price parity → hotel autonomy → platform competition → market entry → ranking → data → consumer choice.

The most significant modern authority is Booking.com, C-264/23 (2024), because the CJEU clarified that price-parity clauses cannot automatically be treated as ancillary restraints merely because they are associated with an online accommodation platform.

The earlier HRS and Booking.com/Bundeskartellamt proceedings illustrate the competition concerns surrounding both wide and narrow parity clauses, while the UK, French, Italian and Swedish proceedings demonstrate the wider European regulatory response.

In short: accommodation platforms can produce significant efficiencies, but competition law scrutinizes contractual and platform practices that may prevent hotels from competing through different channels or make it harder for rival platforms to enter and expand.