How Visa and Mastercard Actually Process Money: The Complete Guide to Understanding Global Payment Networks in 2026

Every time you tap your card at a coffee shop, swipe at a grocery store, or click "buy now" on an online marketplace, an extraordinary chain of events unfolds in mere seconds. Billions of dollars flow across the globe daily through two dominant payment networks that most people barely think about. Yet Visa and Mastercard sit at the very heart of global commerce, connecting consumers, merchants, banks, and financial institutions in a seamless web of digital money movement.

In this comprehensive guide, we will pull back the curtain on exactly how Visa and Mastercard process money, who the key players are, what fees are involved, and how new technologies like artificial intelligence, tokenization, stablecoins, and agentic commerce are reshaping the future of payments in 2026 and beyond.

Understanding Visa and Mastercard: Payment Networks, Not Card Issuers

One of the most common misconceptions about Visa and Mastercard is that they issue credit cards directly to consumers. This is not the case. Visa and Mastercard don't issue cards directly; instead, this is done by the credit card issuer, which could be a bank or credit union. These issuers handle the details like interest rates, perks, and rewards. This means your card's features often depend on the issuer more than the network itself.

So what exactly do Visa and Mastercard do? Visa and Mastercard operate as payment networks. This means they're responsible for processing transactions, connecting merchants to financial institutions, and providing the infrastructure that makes it possible to use your card anywhere their logo is accepted. They ensure that payments are fast, secure, and reliable, but they don't actually issue the cards themselves.

Think of Visa and Mastercard like the highways of the financial world. Banks and credit unions build the cars (credit and debit cards), while Visa and Mastercard build and maintain the roads those cars travel on. The credit card network receives the card information from the payment processor and forwards it to the cardholder's issuing bank for authentication and approval. This is the sense in which the credit card network is a "network": it facilitates the transaction by acting as a highway along which transaction data travels back and forth between the payment processor and the issuing bank.

The Issuing Bank vs. The Network

Issuers are the banks or credit unions that provide you with your card, like Bank of America or Citi. They manage all the details tied to your account, including setting interest rates, annual fees, and specific rewards or perks. The issuing bank ultimately decides the specific features and benefits of the card you carry, even if it's branded by Visa or Mastercard. So, while Visa and Mastercard create the network backbone, your card's details like rewards, fees, and even tiered perks are shaped by the bank that issues the card.

Both Visa and Mastercard offer a tiered system: Visa has Traditional, Signature, and Infinite cards, while Mastercard has Standard, World Mastercard, and World Elite.

The Key Players in Every Card Transaction

Before we walk through the step by step payment process, it is essential to understand the different entities involved in every single credit or debit card transaction. Each player has a unique role, and the process cannot function without any one of them.

1. The Cardholder

If you have a credit or debit card (as most of us do), you're already familiar with the role of the cardholder. A cardholder is someone who obtains a bankcard (credit or debit) from a card issuing bank.

2. The Merchant

Technically, a merchant is any business that sells goods or services. But only merchants that accept cards as a form of payment are pertinent to our explanation. A merchant is any business that maintains a merchant account that enables them to accept credit or debit cards as payment from customers for goods or services provided.

3. The Acquiring Bank (Merchant's Bank)

An acquiring bank is a registered member of the card associations (Visa and Mastercard). An acquiring bank is often referred to as a merchant bank because they contract with merchants (businesses) to create and maintain accounts (called merchant accounts) that allow that business to accept credit and debit cards.

4. The Payment Processor

Payment processors are back-end systems that enable banks and card networks to communicate and exchange data, powering real-time authorization and ensuring payments reach the right place.

5. The Issuing Bank (Cardholder's Bank)

The issuing bank is the customer's bank, the one that issued their credit or debit card. It authorizes the transaction, checks for sufficient funds or credit and ultimately releases the funds when a payment is approved.

6. The Card Network (Visa or Mastercard)

Visa uses their VisaNet network to transmit data between association members, and Mastercard uses their Banknet network. They also function as the governing body of a community of financial institutions, ISOs and MSPs that work together in association to support credit card processing and electronic payments. The primary responsibilities of the Card Association are to govern the members of their associations, including interchange fees and qualification guidelines, act as the arbiter between issuing and acquiring banks, maintain and improve the card network and their brand, and, of course, make a profit.

How a Credit Card Transaction Actually Works: Step by Step

Credit card transactions happen in a two-stage process consisting of authorization and settlement. This is important because different fees are incurred at each stage, and a failure (or partial failure) in either step can result in increased costs and/or credit card sales not being deposited.

Let us break down every step of the journey your money takes from the moment you tap, swipe, or enter your card details online.

Stage One: Authorization

Step 1: The Cardholder Initiates the Transaction

The cardholder (the buyer) presents a credit or debit card to the merchant for payment. This can happen directly, as when a card is swiped, tapped, chipped or inputted manually in a traditional brick and mortar store, or it can take place by phone or online.

Step 2: The Merchant Sends the Authorization Request

After capturing the credit card information, the merchant's POS system or online payment gateway securely transmits the card details to the payment processor. These details are encrypted to ensure the security of the transaction. The payment processor acts as the intermediary, passing the encrypted transaction data to the appropriate card network (Visa, Mastercard, etc.).

Step 3: The Card Network Routes the Request

Once the payment processor receives the transaction data, it sends an authorization request to the relevant card network. The card network then forwards this request to the issuing bank (the customer's bank that issued the credit card). The authorization request contains key details such as the transaction amount, card information, and merchant identification.

Step 4: The Issuing Bank Approves or Declines

The issuing bank reviews the authorization request by checking whether the cardholder has sufficient credit and whether the transaction shows any signs of potential fraud.

Multiple security checks happen during this step. CVV check ensures that the customer provided the correct three digit code on the back of the card. Address verification service (AVS) verifies that the billing address provided by the customer matches the address on file for the cardholder. Banks use sophisticated algorithms and machine learning to analyze transactions for unusual patterns that may indicate fraud, including purchases in a foreign country or abnormally large charge amounts.

Based on these checks, the issuing bank decides whether to approve or decline the transaction. If approved, the transaction moves forward, and the issuing bank sends an authorization code back through the card network to the payment processor, signaling that the transaction can proceed. If declined, a reason code is sent back (e.g., insufficient funds, expired card, suspected fraud), and the transaction is stopped.

Step 5: Response Sent to the Merchant

The card issuer sends a response code back through the appropriate network to the acquiring bank (or its processor). The response code reaches the merchant's terminal, software or gateway and is stored in a batch file awaiting settlement.

This entire authorization process takes just a few seconds. Authorization is the process by which the issuing bank approves or declines a card transaction. This takes place within a matter of seconds at the time of purchase.

Stage Two: Clearing and Settlement

Once the transaction has been authorized and the cardholder walks away with their purchase, the second crucial phase begins at the end of the business day.

Step 6: Batch Submission

At the end of each business day, the merchant sends all approved transactions to the payment processor for settlement. The processor batches the transactions and sends them to the respective card networks. The card networks then coordinate with the issuing banks to process these transactions.

Step 7: The Card Network Clears the Transactions

The card network clears the transactions from different acquiring banks. Clearing is a process in which mutual offset transactions are netted, so the number of total transactions is reduced.

The payment processor receives the batch sent by the merchant, sorts the transactions, and transmits them to the appropriate credit card network. Transactions from Visa cards go to Visa, MasterCard transactions go to MasterCard, and so on.

Step 8: Funds Are Transferred

The issuing bank then debits or charges the cardholder's account, subtracts the interchange fees due to the issuing bank, and sends the remaining funds to the merchant's payment processor. This is why banks like you to get a debit or credit card with them. They make a small amount every time you swipe your card.

The issuing banks transfer the appropriate funds for each transaction to the acquiring bank (the merchant's bank). The acquiring bank deposits these funds into the merchant's business account, minus any processing fees. This step typically takes one to three business days.

Step 9: Cardholder Statement

The final step occurs when the issuing bank adds the transaction amount to the cardholder's monthly credit card statement. The cardholder is responsible for paying this balance according to the terms of their credit card agreement, thus completing the credit card transaction process.

Understanding Interchange Fees: The Cost of Processing Money

Whenever a credit or debit card transaction is processed, various fees are collected. The most significant of these fees is the interchange fee.

The term "interchange rate" refers to the fees charged by banks and payment card networks (such as Visa, Mastercard, American Express, and Discover) for processing transactions when their credit or debit cards are used. These rates are critical for businesses using payment processing solutions, as they directly impact transaction costs.

How Interchange Fees Work

Interchange fees are one component of the Merchant Discount Rate (MDR) established by acquirers, which is paid by merchants to acquirers in consideration for card acceptance services. Mastercard interchange rates are established by Mastercard, and are generally paid by acquirers to card issuers on purchase transactions. Interchange rates are only one of many cost components included in a MDR and are a necessary and efficient method by which Mastercard maintains a strong and vibrant payments network.

Like every major card network, Visa imposes an interchange fee for each transaction paid with a Visa card. These fees vary based on a wide range of circumstances, such as the card type, merchant category code, data level, and more.

Interchange rates are updated biannually, typically in April and October, to reflect changes in market conditions, card usage, and regulatory factors.

Current Fee Landscape: What Merchants Pay

These fees often fall between 2% and 2.5%. But under the long awaited deal, which would end 20 years of litigation, Mastercard and Visa agreed to lower the fees that businesses pay when customers use their credit cards by about one tenth of a percent on most U.S. credit card purchases for five years.

The NRF has long argued that swipe fees are one of the highest operating expenses for retailers.

2026 Interchange Updates

Several important interchange changes are taking effect in 2026. Visa's Digital Commerce Service Fee is increasing and expanding to four additional services. Visa Level 2 CEDP interchange incentives are sunsetting April 17, 2026.

Mastercard increased its Undefined Authorization Fee to start the year. This is important to note because Undefined Authorization Fees are the highest TPE penalties, and this is the second rate hike in just 7 months.

Visa and Mastercard by the Numbers: Market Dominance in 2026

The sheer scale at which these two networks operate is staggering.

Spending for goods and services generated by credit, debit and prepaid cards issued in the US reached $10 trillion for the first time in 2025. Credit cards generated 50.42% of all spending. Purchase volume on Visa credit, debit and prepaid card products was $7.028 trillion, an increase of 6.8%. For Mastercard, purchase volume for all card products was $2.958 trillion, an increase of 6.3%.

"Merchant acceptance locations for card payments in the US surpassed 37 million in 2025," said David Robertson, Publisher of the Nilson Report. "Also growing was the number of Americans with access to a credit, debit or prepaid card." The number of credit, debit and prepaid cards in circulation issued in the US with Mastercard and Visa brands was 2.29 billion on December 31, 2025.

Global Reach and Market Share

Visa holds a 52.2% share of the global credit card market, maintaining its lead over competitors like Mastercard and American Express. In the debit card segment, Visa's share is approximately 60%, driven by strong adoption in emerging markets.

Visa is the world's largest credit card processor with 4.48 billion cards active worldwide. Mastercard has 3.158 billion active cards worldwide.

Visa processed over 233.8 billion transactions globally, a 10% increase from the previous year.

Revenue and Financial Performance

Visa's value-added services totaled $17.5 billion in revenue during fiscal 2025, up 9% from the prior year (out of $40 billion in total revenue).

Visa's global revenue for FY 2024 was $35.926 billion, up 10.0% YoY. Mastercard's revenue for fiscal year (FY) 2024 was $28.167 billion, up 12.2% YoY.

Tokenization: The Security Revolution Transforming Payments

One of the most transformative technologies reshaping how Visa and Mastercard process money is tokenization. This technology is rapidly becoming the new standard in payment security.

Payment tokenization is a process of replacing sensitive payment credentials with a unique identifier. This identifier is called a token.

In payment security, tokenization replaces a card's 16 digit number with a unique, randomly generated series of characters called a "token." As opposed to the original card number, a token is not useful if illegally obtained or obtained by hackers. This is because it can only be decoded within the payment network that issued it.

How Visa and Mastercard Use Tokenization

The Visa Token Service (VTS) and the Mastercard Digital Enablement Service (MDES) are two such services that replace sensitive account information with payment tokens. The Visa Token Service (VTS) is a security technology from Visa that replaces sensitive account information, such as the 16 digit primary account number, with a unique digital identifier (a payment token). Mastercard Digital Enablement Service (MDES) is a data interchange platform for generating and managing secure digital payment tokens.

The Impact of Tokenization on Transaction Approval and Fraud

When Visa card holders use a tokenized transaction, there is about a five percentage point increase in the likelihood the card payment will be completed, without some hiccup in approval. There is also a 40% lower fraud rate.

For Mastercard, there is a similar three percentage point to six percentage point increase in a cardholder's spending if transactions are tokenized, versus a non tokenized transaction. That's because more of the transactions are being approved. "What that effectively means is, there's a happier consumer because there are fewer declined transactions for the consumer, there's more volume going over our system," Mastercard CFO Sachin Mehra explained.

Tokenization's Growing Scale

Visa has high goals when it comes to leading consumers to tokenized transactions. The San Francisco based card network giant aims to have all digital card transactions tokenized, but it's only halfway there. "We've got 50% to go, and a big part of that 50% is tokenizing guest checkout and tokenizing form filled transactions."

The share of Visa eCommerce transactions using manual entry guest checkout declined from almost half of transactions in 2019 to just 16 percent in 2025. Among Visa's top 25 eCommerce sellers, it's already in the low single digits. In many markets, guest checkout will completely vanish soon, thanks in part to the 16 billion Visa tokens that are enabling this change.

Mastercard committed to 100% European e-commerce tokenization by 2030.

AI and Fraud Prevention: How Visa and Mastercard Protect Your Money

Fraud prevention is one of the most critical functions performed by the card networks. On average, organizations lost $60 million to payment fraud in the past year, according to research by Mastercard. Synthetic identity fraud and impersonation scams are rising quickly, fueled by generative AI.

AI Powered Fraud Detection

Mastercard's 2025 payment fraud prevention report found that 42% of issuers and 26% of acquirers have saved more than $5 million in fraud attempts over the past two years thanks to AI.

85% of respondents report seeing returns from using AI for fraud case triage and investigation, transaction pattern recognition and real time detection of suspicious transactions. 83% say AI has significantly sped up their process for fraud investigation and case resolution.

Organizations that have used AI for over five years report saving $4.3 million in lost revenue, almost double the average savings of $2.2 million.

The Rising Threat of AI Powered Fraud

Criminals can deploy the same innovations for their nefarious goals. And they are coming after identity with AI powered deepfakes, agentic scams, and synthetic IDs. In the past, fraud occurred at the transaction level. But with the advances in AI technology, now bad guys are moving upstream where they can steal a consumer's entire identity using hyper realistic scams and impersonations.

2026 will see a material increase in the sophistication and volume of these AI powered identity attacks. This escalation will herald a new AI battle for identity with increased investment, focus and partnership. This is a fight that no bank, merchant, fintech or government can win on their own. The industry will come together in 2026 to develop shared capabilities and technologies to fight identity fraud and manage risk together.

Agentic Commerce: The Future of How Visa and Mastercard Will Process Money

One of the most exciting developments in payments is the rise of agentic commerce, where artificial intelligence agents can shop and make purchases on behalf of consumers.

We have moved from face to face commerce, to eCommerce, to mobile commerce, and now on to agentic commerce where agents transact on behalf of consumers and businesses. In 2026, AI supported shopping will become very real for all of us, and agentic commerce will naturally follow.

Visa Intelligent Commerce

This acceleration builds on Visa's launch earlier this year of Visa Intelligent Commerce, a global initiative grounded in three decades of Visa's AI leadership in secure payments. Visa remains on track to deliver secure, personalized AI enabled commerce to consumers by early 2026.

Visa is working with more than 100 partners around the world across the commerce ecosystem; over 30 partners are actively building within the VIC sandbox, and over 20 agents and agent enablers are integrating directly with Visa Intelligent Commerce. These collaborations have already produced hundreds of controlled, real world agent initiated transactions.

Nearly half of U.S. shoppers (47 percent) now use AI tools for at least one shopping task. With AI generated traffic surging across retail websites, Visa predicts that millions of consumers will use AI agents to complete purchases by the 2026 holiday season.

Mastercard Agent Pay

Last year, Mastercard introduced Mastercard Agent Pay, which instills security and transparency in payments made by an AI agent before, during and after they're made. At the center of the program are Mastercard Agentic Tokens, which harness the tokenization technology that already supports and secures payments worldwide.

Tokenization enables AI agents to be uniquely tied to individual users, safeguarding payment credentials and allowing transactions to move forward seamlessly without constant user involvement. But there's more work to do in establishing protocols and rules that can scale to millions of merchants of all sizes.

Stablecoins and Crypto: A New Frontier for Payment Processing

Both Visa and Mastercard are actively integrating stablecoins and digital assets into their payment ecosystems.

Seamless movement between the fiat and crypto worlds leveraging Visa infrastructure. Crypto wallets with an associated Visa card are given unlimited payment reach, thereby enabling consumers to buy coffee at Starbucks backed by their stablecoin and crypto assets (Visa currently supports more than 130 stablecoin linked card programs in over 40 countries).

Visa does not issue its own stablecoin, but is tapping the market through its internal technology and through partnerships. The card network recently opened its cross border real time payments network, Visa Direct, to enable business clients to move funds to accounts instantly at all times by using stablecoins.

In separate arrangements, Mastercard is working with SoFi and Visa is working with Bridge to build scale in anticipation of greater demand for stablecoins.

One thing is for certain in 2026, the potential applications of stablecoins will be one of the most hotly debated topics of the year. Some estimate the stablecoin market could reach as much as $4 trillion by 2030.

Value Added Services: How Visa and Mastercard Make Money Beyond Transactions

Beyond processing payments, both networks have built massive businesses around value added services. With fintechs and legal cases pressuring payment fees, Visa and Mastercard are leaning more on revenue from other sources.

Value added services are about 30% of Visa's revenue, according to analysts at William Blair, and 44% at Mastercard.

Visa recently upgraded Authorize.net, a service that helps businesses analyze data to more quickly respond to consumer trends. The card brand added more AI models and support for in person card readers and Tap to Phone, or technology that enables smartphones to accept payments with minimal hardware upgrades. These upgrades have launched in the U.S. and are scheduled to be introduced internationally in 2026.

The European Challenge: EuroPA and the Push for Payment Sovereignty

In a significant development for the global payments landscape, thirteen European countries have formed an alliance called EuroPA to build a continent wide payment system that routes around Visa and Mastercard.

Visa and Mastercard together process about $24 trillion per year in transactions. The most concrete European response is the European Payments Initiative, a consortium with 16 major banks and processors, which launched the digital wallet Wero in July 2024. The design is account to account, supported by instant SEPA credit transfers. Wero has more than 47 million registered users in Belgium, France, and Germany.

A Historic Milestone: Half the World Goes Digital

2026 will be the first year in history when half of the world's total consumer payments are made with card credentials. It took us a while to get here, but this is a great milestone. This inflection point is being driven by innovations like tap to pay cards and mobile devices that are enabling the digitization of micro transactions where cash was historically the only answer.

Embedded Payments: The Invisible Transaction

Wex sees embedded payments gathering momentum this year, particularly for business to business payments. Consulting firm Bain projects $7 trillion in embedded payments volume for 2026, for a more than two fold increase over the past five years.

What Happens When You Make an Online Purchase vs. In Store Purchase

Understanding the difference between card present and card not present transactions is essential for comprehending how Visa and Mastercard process money.

There are two transactions that occur: card present and card not present. Card present transactions happen when a buyer physically gives a credit card to a merchant. Approval time is quicker, and fraud is less common. However, card not present transactions are more typical for online payments, requiring additional security on the merchants' behalf against fraudulent charges.

PCI DSS and 3D Secure aim to protect both the merchant and the consumer with cards that are not easily hackable. Tokenization serves the same purpose for cardholder data being switched with a useless token out of context.

Card not present transactions are considered higher risk because the merchant cannot physically validate the credit card or the transaction. As a result, the interchange fee will be higher.

The Global Competition: Visa and Mastercard vs. UnionPay and Local Networks

While Visa and Mastercard dominate global payments, they face growing competition. Card services tend to be imagined as a duopoly between Visa and Mastercard. However, China's UnionPay surpassed Mastercard by transaction volume in 2017. In 2023, UnionPay recorded 228 billion transactions globally, now firmly in second place behind Visa (267 billion). According to Retail Banking Research, it also surpassed both Visa and Mastercard in terms of overall payment value.

Three companies process 97% of all credit card transactions worldwide: Visa, UnionPay, and Mastercard.

Meanwhile, promising fintech competitors like PayPal and Apple Pay have now turned into Visa and Mastercard collaborators in a bid to secure a spot in the massive and lucrative digital payments industry.

Real Time Payments: Speeding Up Settlement

The traditional one to three day settlement window is being challenged by real time payment rails. ACI Worldwide predicted that real time payments, along with mobile wallets and new digital asset rails, will get more traction this year as they offer a channel to draw more individuals into the financial system.

The Visa Direct platform, which supports real time payments, processed approximately 10 billion transactions, marking a 38% growth from the previous year.

The Visa Direct platform enhanced its real time payment capabilities, enabling funds to be available in U.S. bank accounts within 1 minute starting April 2025.

Key Takeaways: How Your Money Actually Moves

To summarize the entire payment processing journey:

You initiate the payment by tapping, swiping, inserting your card, or entering details online.
The merchant's payment processor encrypts and sends your transaction data to the card network (Visa or Mastercard).
The card network routes the data to your issuing bank for verification.
Your issuing bank checks your balance, credit limit, and runs fraud checks before approving or declining.
The approval or decline travels back through the network to the merchant in seconds.
At end of day, the merchant sends all approved transactions in a batch to the processor.
The processor and card network clear and settle the transactions, moving money from your issuing bank to the merchant's acquiring bank, minus interchange fees.
The merchant receives funds in their bank account within one to three business days.
You see the charge on your monthly statement and pay your bank according to your card agreement.

This entire ecosystem processes trillions of dollars every year, and the speed and security continue to improve with every technological advancement.

Conclusion: The Future of Money Movement Is Here

The way Visa and Mastercard process money is far more complex and fascinating than most consumers realize. What appears as a simple tap or swipe triggers an intricate chain of authorization, authentication, clearing, and settlement that involves multiple financial institutions, security protocols, and network infrastructure.

As we move deeper into 2026, the payments landscape is evolving rapidly. Tokenization is replacing raw card numbers. AI agents are beginning to shop and pay on our behalf. Stablecoins are entering the mainstream payment ecosystem. Real time payments are becoming the norm rather than the exception. And new competitive forces from Europe and Asia are challenging the traditional dominance of these two American payment giants.

Whether you are a consumer who wants to understand where your money goes, a business owner trying to optimize payment processing costs, or an investor evaluating the financial technology sector, understanding how Visa and Mastercard actually process money is essential knowledge in the modern digital economy.

Sources:

Visa Corporate: https://corporate.visa.com
Mastercard Interchange Rates: https://www.mastercard.com/us/en/business/support/merchant-interchange-rates.html
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American Banker: https://www.americanbanker.com/payments
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Mastercard AI Fraud Prevention: https://www.mastercard.com/global/en/news-and-trends/Insights/2026/ai-is-helping-banks-save-millions-by-transforming-payment-fraud-prevention.html
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Mastercard Agentic Commerce: https://www.mastercard.com/global/en/news-and-trends/stories/2026/agentic-commerce-standards.html