How the Mastercard Network Works

If you read our piece on how the Visa network works, much of what follows will feel familiar — and intentionally so. Mastercard operates on the same fundamental four-party model as Visa. The two networks share the same structural logic: a network company in the middle, issuers and acquirers on either side, cardholders and merchants at the edges.

But the differences matter. Mastercard's history, network architecture, ownership structure, and strategic positioning diverge from Visa in ways that are worth understanding — especially if you work with payment systems at any level.

What Mastercard Is

Like Visa, Mastercard is a payment network, not a bank. It does not issue cards, extend credit, or hold customer funds. Its business is operating the infrastructure that connects issuing banks and acquiring banks — routing authorization messages, clearing transactions, and facilitating settlement.

Banknet — Mastercard's Core Network

Where Visa has VisaNet, Mastercard has Banknet — its proprietary global telecommunications network that handles authorization, clearing, and settlement.

Banknet connects Mastercard's member financial institutions across more than 210 countries and territories. Like VisaNet, it operates with extreme redundancy and availability targets — Mastercard claims a network availability rate that effectively means seconds of downtime per year.

Key technical characteristics of Banknet:

• Processes authorization responses in an average of 130 milliseconds globally
• Handles over 120 billion transactions annually
• Operates dual processing centers with automatic failover
• Supports ISO 8583 messaging — the international standard for financial transaction messages

The Four-Party Model

Mastercard uses the same four-party structure as Visa:

The transaction flow is structurally identical to Visa — authorization request travels from merchant to acquirer to Banknet to issuer, response returns the same way. The difference is in the rails, the rules, and the fee structures.

How a Mastercard Transaction Flows

How Mastercard Makes Money

Mastercard's revenue model mirrors Visa's closely — it earns fees from the network, not from lending:

Domestic assessments

Fees charged to issuers and acquirers based on the volume of transactions processed over Banknet within a country. This is Mastercard's largest revenue category.

Cross-border volume fees

Charged when a transaction crosses a national border — for example, a US cardholder using their card in Canada. Cross-border fees are significantly higher than domestic fees and represent a disproportionately large share of Mastercard's profits.

Transaction processing fees

Per-transaction fees for each authorization, clearing, and settlement message processed over Banknet.

Other services

Mastercard has aggressively expanded into data analytics, fraud scoring, cybersecurity (via its acquisition of RiskRecon and NuData Security), and open banking (via its acquisition of Finicity). These services now represent a growing share of revenue beyond pure network fees.

Mastercard vs Visa — Key Differences

Mastercard's Unique Products

Maestro

Mastercard's legacy international debit brand, widely used in Europe. Maestro cards require PIN authorization and do not support offline transactions — making them more secure but less flexible than standard debit cards. Mastercard announced it is phasing out Maestro in favor of standard Debit Mastercard.

Cirrus

Mastercard's global ATM network, allowing cardholders to withdraw cash at ATMs worldwide. Every Mastercard and Maestro card displays the Cirrus logo, giving holders access to over 2 million ATMs globally.

Mastercard Send

A push payments platform that enables real-time fund disbursements directly to debit cards — used for insurance payouts, gig economy worker payments, and peer-to-peer transfers. Competes directly with Visa Direct.

The Interchange Question

Like Visa, Mastercard sets interchange rate schedules but does not receive interchange fees itself. Interchange flows from the acquirer to the issuer — Mastercard simply publishes the rates that govern those flows.

Mastercard's US interchange rates are broadly comparable to Visa's, though the specific rates differ by card product and merchant category:

Why Two Networks Coexist

Given how similar Visa and Mastercard are, why do both exist? The answer is partly historical and partly competitive. Both networks emerged from bank consortiums in the late 1960s — BankAmericard became Visa, and the Interbank Card Association became Mastercard. The two networks developed in parallel, each building their own infrastructure and member relationships.

Today, competition between the two benefits the ecosystem. Banks can negotiate with both networks for better terms. Merchants benefit from a competitive fee environment. And the existence of two major networks provides redundancy — if one network has an outage, the other continues processing.

The Bottom Line

Mastercard and Visa are more alike than they are different — both are network businesses operating four-party models, both earn fees from transaction volume rather than lending, and both are deeply embedded in the global payments infrastructure. The differences lie in scale, specific network implementations, fee structures, and strategic expansion into adjacent services.

For anyone working with payment systems, understanding that these are competing network operators — not banks, not card issuers, and not interchangeable from a technical standpoint — is the foundational insight that makes everything else clearer.