Competition Law and Payment Ecosystem Governance and Antitrust

1. Introduction

The modern payment ecosystem is no longer limited to banks transferring money between accounts. It includes card networks, payment gateways, payment processors, digital wallets, UPI-type instant-payment systems, mobile operating systems, app stores, fintech firms, banks, merchants, payment aggregators, authentication providers, tokenisation services and data-driven payment platforms.

Competition law becomes important because payment markets possess several structural characteristics that can facilitate market power:

network effects;

economies of scale;

interoperability requirements;

switching costs;

access to transaction and consumer data;

technical standards;

two-sided or multi-sided market structures;

platform dependency;

regulatory barriers to entry; and

vertical integration between payment infrastructure and adjacent digital services.

Payment ecosystem governance therefore refers to the rules and institutional arrangements determining who can participate in a payment system, under what technical and commercial conditions, how interoperability is achieved, how fees are determined, how data can be used, and whether dominant participants can discriminate against rivals.

Competition law does not require every payment system to be fragmented. Rather, it seeks to ensure that legitimate coordination, security and standardisation do not become mechanisms for exclusion, foreclosure, collusion or exploitation.

2. Structure of the Payment Ecosystem

A typical digital-payment transaction can involve:

Consumer → Mobile Device/OS → Payment Application → Payment Gateway/Processor → Payment Network → Issuing Bank → Acquiring Bank → Merchant

Different firms may occupy multiple levels simultaneously.

For example, a technology company might operate:

a mobile operating system;

an app store;

a wallet;

a payment service;

an authentication mechanism; and

an advertising/data ecosystem.

This creates competition-law questions concerning vertical leveraging.

A firm with market power at one level may have incentives to use that position to disadvantage competitors at another level.

3. Relevant Markets

The first competition-law question is normally the definition of the relevant market.

Payment services can potentially be divided into markets such as:

A. Card-payment networks

Competition may exist between different card schemes and payment networks.

B. Merchant acquiring

Banks and payment processors compete to provide merchants with acceptance and processing services.

C. Payment gateways

Gateways facilitate technical connections between merchants and payment networks.

D. Digital wallets

Wallets can constitute a distinct competitive environment where consumers store credentials or funds and initiate payments.

E. Mobile-device payment services

Mobile wallets may compete with device-specific payment systems, although the precise market definition depends on substitutability.

F. Account-to-account payments

Instant bank-transfer systems may constitute another payment category.

G. Payment authentication and tokenisation

Authentication and tokenisation can become competitive bottlenecks where access is controlled by a dominant platform.

The relevant market cannot simply be assumed from the technology. Authorities generally examine demand-side substitutability, supply-side substitutability, geographic conditions, network effects and the role of different sides of the platform.

4. Two-Sided and Multi-Sided Markets

Payment systems are classic examples of multi-sided markets.

A payment network may simultaneously serve:

cardholders;

merchants;

issuing banks;

acquiring banks;

payment processors.

The value of the network increases as participation increases.

This produces a network-effect feedback loop:

More consumers → more merchants → more transactions → greater network value → more consumers.

Such feedback can produce substantial competitive advantages for established payment networks.

Competition authorities therefore need to distinguish between:

Efficient network effects

These may result from genuine improvements in convenience, security and transaction reliability.

Exclusionary network effects

These may arise when a dominant platform deliberately prevents rival networks from achieving sufficient scale.

5. Interoperability and Competition

Interoperability is one of the central competition issues in payment ecosystems.

If consumers using one payment service cannot transact with users or merchants connected to another service, network effects may reinforce incumbency.

Competition concerns arise where a dominant firm:

refuses interoperability;

delays technical integration;

imposes discriminatory access conditions;

restricts API access;

prevents alternative payment methods;

limits tokenisation by rivals;

prevents competing wallets from accessing NFC functionality; or

makes interoperability technically possible but commercially impracticable.

However, interoperability requirements must also accommodate:

cybersecurity;

fraud prevention;

consumer protection;

privacy;

operational resilience; and

legitimate technical standards.

Therefore, competition law must distinguish genuine technical restrictions from strategically exclusionary restrictions.

6. Payment Governance and Standardisation

Payment ecosystems require extensive standardisation.

Examples include:

payment messaging standards;

authentication standards;

security protocols;

tokenisation;

QR-code standards;

APIs;

fraud-monitoring standards;

settlement procedures.

Standardisation can produce significant efficiencies.

But standard-setting can also create competition risks.

Participants might use a standards organisation to:

exclude a rival technology;

impose discriminatory technical requirements;

share commercially sensitive information;

coordinate future pricing;

prevent alternative standards from developing.

Consequently, competition authorities examine whether governance arrangements are open, transparent, objective and non-discriminatory.

7. Dominance and Payment Infrastructure

Article 102 TFEU and comparable national competition provisions can become relevant where a payment infrastructure operator possesses a dominant position.

Potential abuses include:

1. Refusal to deal

A dominant network may deny access to competitors without legitimate justification.

2. Discriminatory access

A dominant operator may provide better technical or commercial conditions to its own affiliated services.

3. Excessive or discriminatory fees

High transaction or access fees may potentially raise competition concerns depending on the circumstances.

4. Self-preferencing

A payment platform may favour its own payment service over competing providers.

5. Tying and bundling

A dominant firm might require merchants to use its payment-processing service together with another service.

6. Exclusivity

Merchants or financial institutions may be discouraged from using competing payment systems.

7. Technical foreclosure

A platform may technically restrict access to APIs, NFC, tokenisation or authentication systems.

8. Interchange Fees

Interchange fees represent one of the most significant competition-law issues in card payments.

In simplified form:

Merchant → Acquirer → Card Network → Issuer

An interchange fee can be transferred between acquiring and issuing institutions as part of the payment arrangement.

Competition authorities have historically examined whether collectively determined interchange fees restrict competition.

The principal concern is that competitors participating in a common payment system may collectively determine an important component of the price structure.

At the same time, payment systems argue that interchange fees can:

finance card issuance;

encourage consumer adoption;

support fraud prevention;

facilitate investment;

balance incentives between merchants and consumers.

Competition analysis therefore considers both restrictive effects and objective efficiencies.

9. Important Case Laws

Case 1: MasterCard Inc. v European Commission

Court of Justice of the European Union, Case C-382/12 P

This is one of the most important payment-competition cases.

The dispute concerned MasterCard's multilateral interchange fees.

The European Commission had concluded that the arrangements restricted competition. MasterCard argued that the interchange mechanism was necessary for the functioning of the payment system.

The Court upheld the essential finding that the multilateral interchange fees constituted a restriction of competition under EU competition law.

Significance

The case demonstrates that:

payment networks are subject to competition law;

collectively established payment fees can constitute restrictions of competition;

efficiencies must be demonstrated rather than simply asserted;

the multi-sided nature of a payment system does not automatically remove competition-law liability.

It is a foundational case for understanding payment-network governance and collective pricing.

10. Case 2: Visa Europe and Interchange Fees

The European Commission's proceedings concerning Visa Europe similarly examined multilateral interchange fees.

Visa's interchange arrangements raised concerns that collectively established fees could influence the competitive conditions under which acquiring banks provided services to merchants.

Competition-law importance

The matter demonstrates that competition authorities may scrutinise:

collective fee-setting;

payment-network rules;

merchant-acquiring conditions;

restrictions affecting alternative payment providers.

It also illustrates the importance of commitments and regulatory solutions in payment markets.

11. Case 3: European Commission v Visa Europe

The Commission's enforcement against Visa Europe concerning inter-regional interchange fees further demonstrated that payment-network rules can have cross-border competition consequences.

The central issue involved fees affecting transactions involving payment cards issued in one geographic area but used in another.

Significance

The case illustrates how:

payment networks can operate across multiple geographic markets;

fee structures can affect competition between acquiring institutions;

network rules can influence merchants and consumers indirectly.

It also highlights the importance of distinguishing between technical network governance and economically significant commercial restrictions.

12. Case 4: American Express v Italian Competition Authority

Case C-304/16, American Express

The litigation concerned competition-law proceedings involving payment-card arrangements and the interpretation of Article 101 TFEU.

The Court considered the appropriate framework for assessing restrictions in a two-sided payment system.

Significance

The case is especially important because it demonstrates that competition analysis of payment systems cannot necessarily focus on only one side of the platform.

The economic relationship between:

cardholders, and

merchants

may need to be considered together.

This is particularly relevant when assessing whether a restriction on one side generates efficiencies on the other.

13. Case 5: SIAE v AGCM / Digital Payment and Platform Intermediation Principles

Competition cases involving digital intermediaries and payment-related services demonstrate that payment functionality can become part of a broader digital platform ecosystem.

Where an undertaking controls an important digital interface, competition concerns may arise if payment functionality is used to:

disadvantage competing service providers;

impose discriminatory conditions;

prevent alternative payment channels; or

extend dominance into adjacent markets.

The broader principle is that payment functionality cannot be treated as competition-law neutral merely because it is technically integrated into a digital platform.

14. Case 6: Apple – App Store Payment Restrictions

European Commission and national competition proceedings involving Apple's App Store payment rules provide an important modern example.

The central concern has been whether control over the app-distribution ecosystem can be used to influence the payment methods available to developers and consumers.

Competition questions include:

mandatory use of an in-app payment system;

commissions on transactions;

restrictions on alternative payment systems;

anti-steering restrictions;

restrictions on communicating alternative purchasing options.

Significance

The broader competition principle is that a platform controlling access to consumers can potentially leverage that position into payment services.

The case therefore connects:

App-store governance + payment processing + platform dominance + vertical integration.

15. Case 7: Google Android and Billing Restrictions

European competition proceedings concerning Google's Android ecosystem have also demonstrated the relevance of payment-related restrictions within broader platform arrangements.

Where an ecosystem operator controls:

mobile operating systems;

application distribution;

technical interfaces; and

payment functionality,

competition authorities may examine whether contractual or technical restrictions prevent competing services from accessing users.

Significance

This demonstrates the growing importance of ecosystem competition rather than examining individual payment products in isolation.

16. Case 8: Visa and ATM Interchange Arrangements

Competition authorities in various jurisdictions have examined arrangements concerning ATM networks and interchange fees.

ATM systems demonstrate another important characteristic of payment competition:

Interoperability can simultaneously increase consumer welfare and create opportunities for collective coordination.

Banks need to cooperate to ensure that customers can access cash through interoperable networks. But cooperation concerning access charges, network rules or competitive conditions may create competition concerns if it goes beyond what is objectively necessary.

17. Payment Gateways and Market Concentration

Payment gateways can become concentrated because of:

high fixed technology costs;

security requirements;

regulatory licensing;

merchant integration costs;

reputation effects;

fraud-management capabilities;

accumulated transaction data.

Concentration itself does not constitute an antitrust violation.

However, a highly concentrated gateway market can create risks if a leading provider:

refuses access;

imposes discriminatory technical conditions;

ties gateway services to other products;

imposes exclusivity;

restricts merchants from using rival gateways;

degrades interoperability; or

uses transaction data to disadvantage competing providers.

18. Payment Data as a Competitive Asset

Payment transactions generate valuable information concerning:

consumer behaviour;

transaction frequency;

merchant performance;

purchasing patterns;

geographic demand;

customer segmentation.

Large payment platforms may therefore possess significant data advantages.

Competition concerns may arise where a dominant payment platform:

collects data from merchants;

observes their transaction patterns;

operates competing merchant services; and

uses the information to compete against those merchants.

This creates a potential data-enabled vertical foreclosure problem.

19. Self-Preferencing in Payment Ecosystems

Consider a hypothetical platform operating:

a dominant mobile operating system;

an app marketplace;

a payment wallet; and

a competing payment service.

If the platform gives its own payment service:

preferential API access;

default status;

superior authentication;

lower technical latency;

exclusive tokenisation access; or

privileged placement,

competition authorities may investigate whether the arrangement disadvantages rival payment providers.

The central question is whether the advantage derives from legitimate technical integration or exclusionary exploitation of platform control.

20. Default Settings

Defaults can be particularly important in payment ecosystems.

A payment application selected as the default may benefit from:

consumer inertia;

reduced search costs;

automatic transaction routing;

stronger network effects.

Competition concerns can therefore arise if a dominant platform makes rival payment services difficult to select.

Competition analysis may examine:

whether users can change the default;

how easy the process is;

whether the platform repeatedly resets the default;

whether competing applications receive equivalent technical functionality.

21. Exclusivity Agreements

Payment platforms sometimes negotiate arrangements with:

merchants;

banks;

retailers;

app developers;

marketplaces.

Exclusive arrangements may produce legitimate efficiencies, including:

lower processing costs;

fraud-management investments;

customised infrastructure.

However, exclusivity may become problematic where a dominant firm uses it to prevent competitors from obtaining sufficient scale.

The relevant analysis generally considers:

duration;

market coverage;

foreclosure;

market power;

switching possibilities;

efficiencies;

availability of alternatives.

22. Payment Market Cartels

Payment ecosystems can facilitate collusion because competitors frequently participate in common technical and governance organisations.

Potentially problematic conduct includes agreements concerning:

transaction fees;

merchant fees;

access charges;

interchange fees;

market allocation;

customer allocation;

technical restrictions designed to exclude rivals.

The fact that cooperation occurs through a payment association does not automatically immunise it from Article 101-type competition rules.

23. Algorithmic Coordination

Modern payment systems increasingly rely upon algorithms for:

fraud detection;

transaction routing;

pricing;

risk scoring;

merchant classification;

authentication.

Algorithms may create new forms of competition risk.

For example, competing payment processors could independently use similar pricing algorithms trained on common market information. In certain circumstances, competition authorities may investigate whether technology facilitates tacit coordination or information exchange.

However, the mere use of similar algorithms is not by itself proof of collusion.

24. Payment Routing and Competition

Routing determines how transactions are processed.

A platform may potentially prefer:

Platform's own network → Platform's processor

over:

Independent network → Independent processor.

This can raise competition concerns where merchants are technically able to use multiple networks but the dominant platform artificially restricts routing choices.

Competition authorities may therefore examine whether payment routing is:

neutral;

transparent;

technically accessible;

economically reasonable.

25. Interoperability Obligations

Competition law may sometimes support interoperability where control over infrastructure creates substantial competitive dependence.

Possible remedies include:

API access;

open technical standards;

non-discriminatory access;

data portability;

payment-network interoperability;

multi-homing;

alternative payment selection.

But interoperability should be designed carefully because mandatory access can create:

cybersecurity risks;

free-riding;

investment disincentives;

privacy problems.

26. Regulatory Governance and Competition Law

Payment markets are heavily regulated because payment failures can produce systemic consequences.

Regulators may impose:

licensing requirements;

capital requirements;

cybersecurity rules;

authentication requirements;

consumer-protection obligations;

operational-resilience standards;

data-localisation requirements.

These rules can unintentionally affect competition.

For example, excessive licensing requirements can increase entry barriers.

Conversely, appropriate regulation can increase competition by establishing interoperable infrastructure that smaller firms can access.

Thus:

Financial regulation and competition policy should generally be understood as complementary rather than mutually exclusive.

27. Competition Concerns in UPI-Type Systems

Instant-payment systems provide a particularly interesting competition model.

An interoperable infrastructure can reduce dependence on individual private networks.

Competition questions may nevertheless arise around:

access to the payment infrastructure;

application-level competition;

transaction routing;

data access;

pricing;

default applications;

technical standards;

participation requirements.

A payment system may therefore be highly interoperable at the infrastructure layer while remaining concentrated at the application or customer-interface layer.

28. Payment Ecosystem Governance: Key Antitrust Risks

29. Relationship with Article 101 TFEU

Article 101 primarily addresses agreements, decisions by associations of undertakings and concerted practices.

Payment ecosystems can trigger Article 101 issues when participants collectively agree on:

interchange fees;

network rules;

merchant restrictions;

access conditions;

territorial limitations;

technical standards.

The key questions are:

Is there an agreement or concerted practice?

Does it have an anti-competitive object or effect?

Is competition appreciably restricted?

Can Article 101(3) efficiencies justify the arrangement?

30. Relationship with Article 102 TFEU

Article 102 becomes relevant when a payment undertaking or platform holds a dominant position.

Potential abuses include:

refusal to supply;

discriminatory access;

tying;

bundling;

exclusivity;

self-preferencing;

predatory pricing;

excessive pricing;

leveraging;

technical foreclosure.

The existence of dominance alone is not unlawful. The competition concern arises from abusive conduct by a dominant undertaking.

31. Merger Control in Payment Markets

Payment markets can also raise merger-control concerns.

Potential transactions include:

payment processor acquisitions;

fintech acquisitions by banks;

wallet acquisitions by technology platforms;

payment gateway mergers;

acquisition of fraud-detection companies;

acquisition of financial-data providers.

A transaction may be particularly significant where it combines:

payment infrastructure + consumer data + platform access.

Authorities may investigate whether the merger eliminates an emerging competitor or increases barriers to entry.

32. Remedies

Competition authorities can use several remedies.

Structural remedies

In exceptional circumstances:

divestiture;

separation of business units;

ownership separation.

Behavioural remedies

More commonly:

non-discriminatory access;

interoperability;

API access;

prohibition of exclusivity;

transparent pricing;

non-discrimination;

alternative payment options.

Governance remedies

Authorities may also require:

independent technical governance;

transparent standards;

objective access criteria;

dispute-resolution mechanisms.

33. Indian Competition-Law Perspective

In India, payment ecosystems can raise issues under the Competition Act, 2002, particularly:

Section 3 — anti-competitive agreements;

Section 4 — abuse of dominant position;

Section 5 — combinations;

Section 19 — inquiry into agreements and dominance;

Section 26 — investigation procedure;

Section 27 — orders against anti-competitive conduct.

The Competition Commission of India (CCI) can therefore examine payment-related conduct where the statutory requirements are satisfied.

India's digital-payment environment is particularly significant because of:

UPI;

payment aggregators;

digital wallets;

banks;

fintech companies;

mobile platforms;

app stores;

card networks.

The competition analysis must nevertheless remain distinct from financial-sector regulation administered by institutions such as the RBI.

34. Key Indian Competition Issues

Several issues can potentially arise:

Payment-app concentration

A small number of applications may obtain substantial transaction shares because of network effects.

Platform dependence

Payment applications may depend upon mobile operating systems and app stores.

Merchant acceptance

Large payment platforms may possess substantial bargaining power over merchants.

Data advantages

Large transaction volumes can create informational advantages.

Interoperability

Interoperability can reduce switching costs but may also raise technical and security questions.

Zero-price services

A payment application may charge consumers nothing while monetising the ecosystem through other services.

This makes traditional price-based competition analysis insufficient.

35. Central Economic Problem

The central competition-law challenge can be expressed as:

How can law preserve the efficiencies of an interconnected payment network without allowing control of the network to become a mechanism for excluding competing payment providers?

Payment systems need cooperation.

But competition law must ensure that cooperation does not become:

cooperation → coordination → exclusion → market foreclosure.

36. Important Principles Emerging from the Case Law

The cases discussed above collectively illustrate several principles:

Principle 1: Payment systems are subject to ordinary competition law

Financial or technical regulation does not automatically exempt payment arrangements from antitrust scrutiny.

Principle 2: Network effects matter

The competitive significance of a payment platform cannot be assessed solely by looking at its immediate transaction price.

Principle 3: Two-sided effects may be relevant

Effects on consumers and merchants may need to be considered together.

Principle 4: Interchange fees can attract scrutiny

Collective fee-setting can constitute a significant competition issue.

Principle 5: Technical control can become market power

Control over APIs, tokenisation, authentication or device functionality may influence competition in adjacent markets.

Principle 6: Interoperability can promote competition

But mandatory interoperability must be balanced against legitimate security and investment concerns.

Principle 7: Digital ecosystems broaden the analysis

Payment competition increasingly overlaps with:

operating systems;

app stores;

cloud services;

digital identity;

advertising;

data markets.

37. Conclusion

Payment ecosystem governance and antitrust are increasingly interconnected. Payment systems require coordination, common standards and interoperability, but those same mechanisms can create opportunities for market concentration and exclusion.

The principal competition-law risks involve interchange-fee coordination, payment-network rules, interoperability restrictions, refusal of access, discriminatory technical conditions, self-preferencing, exclusivity, tying, data advantages, app-store payment restrictions and algorithmic coordination.

The major cases involving MasterCard, Visa, American Express and digital-platform payment arrangements demonstrate the evolution of competition law from traditional examination of transaction prices toward a broader assessment of network effects, multi-sided markets, infrastructure control and ecosystem power.

The most important analytical distinction is therefore between necessary coordination that makes payment systems function and strategic coordination or exclusion that weakens competition. Effective antitrust governance should preserve interoperability, innovation, security and investment while preventing dominant payment infrastructures from becoming unavoidable competitive bottlenecks.