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Credit Card Networks: What They Are and How They Work

What is a credit ca✱rd network and how does it w💞ork?

A woman makes a credit card purchase at a store.

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Definition

Credit card networks provide the infrastructure for customers to make purchases from merchants. They allow financial institutions to talk to each o🔥♊ther, approve transactions, and—ultimately—hand over the money.

What Are Credit Card Networks?

Credit card networks provide the infrastructure for customers to make purchases from merchants. They allow financial institutions to talk to each other, approve transactions, and—ultimately—hand over the money. If the bank account🦩s of a business and a customer are like individual countries, then a credit card network is like the international shipping company that goes between the two. 

Credit card networks—along with 🎐the other moving parts in card-based transactions—help power many of the payments people make these days. They sometimes offer benefits to consumers, such as renta𒊎l car insurance or travel rewards. More importantly, the different networks charge various fees to businesses, which they may pass on to their customers, or they may decline to accept certain cards as payment entirely.  

Key Takeaways

  • Visa, Mastercard, American Express, and Discover are the four main credit card networks in the United States. 
  • Credit card networks allow customer and merchant banks to talk to each other and process payments. 
  • Credit card networks are responsible for many of the fees merchants pay to accept credit card payments from customers, but various other companies charge fees for every credit card purchase.

Tip

These four companies are also known as payment card networks because they handle debit card transactions in addition to credit card tran🥃s♏actions.

How Credit Card Networks Work

If you’ve only ever swiped 💎your credit card to make a purchase, it can be shocking to realize how many parts are moving in the background for that one transaction 🤡to take place. 

To see how credit card networks operate alongside all the other bits to help process a transaction, we’ll consider a fictional purchase of a vampire costume that you make from Colin’s Halloween Store using your Visa credit card from Al Qolnidar Bank. Here are the steps involved.

  1. Customer gives their credit card to the merchant: You can enter your card details online, use a mobile wallet, tap, swipe, etc.—each of which may cause Colin to pay different fees to process your transaction. 
  2. Merchant submits the payment information to the credit card processor: Colin enters your credit card information and purchase amount into his 澳洲幸运5开奖号码历史查询:point-of-sale (POS) system, which then contacts the company he hired to process credit card payments.
  3. Credit card processor contacts the acquiring bank: The credit card processing company passes this information on to an “澳洲幸运5开奖号码历史查询:acquiring bank,” which holds a separate merchant account used as a temporary holding fund for credit card payments.
  4. Acquiring bank contacts the credit card network: Your payment information is routed to the 澳洲幸运5开奖号码历史查询:Visa credit card network, which has the address for your account at Al Qolnidar Bank. 
  5. Credit card network contacts the issuing bank: Visa passes the information on to Al Qolnidar Bank to see if you can make the purchase. Al Qolnidar Bank checks your account to make sure your credit limit allows for the payment.
  6. Issuing bank approves the transaction and sends payment to the acquiring bank: If everything’s clear on your account, Al Qolnidar Bank sends a signal back through the network to give Colin the green light, alerting him that payment is on the way and that you can leave with your costume purchase just in time for the midnight party.
  7. Acquiring bank holds the payment for the credit card processor: Al Qolnidar Bank sends the funds to the acquiring bank (get it—the “acquiring bank” acquires the payments), where they’re tucked away safely into the merchant account.
  8. Credit card processor passes the payment on to the merchant: Colin requests that his credit card payments—currently stored in the merchant account—be transferred to his day-to-day business bank account. Only then can he actually access the money from the purchase—minus any credit card processing fees, of course.

Important

All business owners who accept credit cards need a 澳洲幸运5开奖号码历史查询:merchant account for those payments in case of any chargebacks, such as returned items or fraud. They can apply for a merchant account directly from an acquiring bank like Wells Fargo or Bank of America, or hire a full-service payment processor that already has one, such as Square or PayPal

Top Credit Card Networks

There ar๊e many credi🃏t card networks worldwide, but most credit cards in the U.S. fall under only a few major ones:

Functionally speaking, there’s not too much difference between the networks. “Visa, Mastercard, and Discover are essentially one and the same at this point,” say🅰s Phillip Parker, founder of .

American Express stands out because of the high fees it charges merchants. This even causes some businesses to refuse it as a payment method, flustering many a customer trying to use their Amex card to pay for a purchase. “It's a bittersweet pill for business owners because Amex cardholders are often affluent and big spenders, but their business comes at a higher price,” says Parker.

Credit Card Network Fees

Given the list of companies shaking hands in order to make a single credit ca♑r꧒d payment happen, it’s understandable why it costs a business owner more to accept credit cards. Companies and credit card networks charge fees at various points along the way, which are rolled up and passed on to the merchant—who often passes them on to the customer in the form of higher prices. 

These collective fees are known as the 澳洲幸运5开奖号码历史查询:merchant discount rate (MDR) because they’re taken out of the payment merchants ultimately get in their bank account. A typical MDR ranges from 1% to 3%, meaning that for every $100 processed through the credit card network, the business owner receives $97 to $99. The MDR is typically charged by the credit card processing company, and it’s composed of three main charges:

  • Interchange fees: These are paid to the bank that issues the credit card. It’s typically the largest chunk of the MDR, and the credit card network sets the price based on the type of card and how it is used (swiped in person vs. entered online, for example).
  • Assessment fees: The credit card network takes a cut of the fee for its services to bridge the gap between the customer and the merchant. 
  • Payment processing fees: The payment processing company charges fees too, which it does in various ways, such as with a tiered pricing model, a flat rate per transaction, etc. 

“As a business, there is more than one pricing schedule when it comes 🦩to how your processing fees can be assessed,” says Parker. “Some schedules are transparent and fair, while others are intentionally veiled and expensive. Getting a basic understanding🥃 of these pricing models can save you a ton in fees.”

Types of Credit Card Networks

Credit card networks generally operate on an open or closed basis, and🍬 these terms could♍ refer to several things.

Open-loop credit cards can be used anywhere their network, such as Visa, is accepted. They’re what you likely think of as a typical credit card. 澳洲幸运5开奖号码历史查询:Closed-loop credit cards, in contrast, are often issued by individual merchants on their own pr💦ivate network and can only be used in that specific store (like a Home Depot ♛store credit card). These are popular with many nationwide retailers.

A closed credit card network could also refer to American Express or Discover, which cut out the issuing bank and work directly between the customer and the merchant’s payment processing system. You can get a Visa card issued by Chase Bank, for example, but if you get an 澳洲幸运5开奖号码历史查询:Amex Platinum Card, it’s just that—a card issued by Amex, usi😼ng theꦛ Amex network. 

Credit Card Network vs. Credit Card Issuer

A credit card network facilitates the flow of information and money between a customer’s bank and the business owner’s. It’s like the shipping company t𒆙hat moves goods from one country to another, or the switchboard operator 🔥that connects two people making old-timey phone calls. 

The credit card issuer, on the other hand, is the company that gives the credit card to the customer and maintains the customer’s 澳洲幸运5开奖号码历史查询:credit account. The issuer charges the customer annual fees and interest, handles purchase disputes, resolves cases of credit card fraud, offers rewards, and more. 

Companies operating on closed networks, notably American Express and Discover, do both: The🐻y handle the customer account side of things, as well as the background flow of information between the customer and the merchant. 

Frequently Asked Questions (FAQs)

What Is the Largest Credit Card Network in the World?

Visa was the largest credit card network in the world in 2023, handling 39% of all card transactions, according to the most recent statistics available from Nilson. UnionPay, a network popular in Asia but accepted in many countries, followed closely behind at 33% of transactions, and Mastercard at 25%. 

Why Do American Express and Discover Charge Higher Fees for Businesses?

American Express and Discover are known to offer more premium benefits to consumers, which they help make up for with higher 澳洲幸运5开奖号码历史查询:interchange fees. They also cut out some of the middlemen involved with other credit card networks, which allows them to set hi𝄹gher prices. 

What’s the Difference Between a Card Network and a Payment Processor?

A 澳洲幸运5开奖号码历史查询:payment processor handles the flow of information and money b꧅etween the business owner and the credit card network. The credit card network, in turn, transfers money and informati🐬on between the customer’s credit account and the business owner’s payment processor. 

Do Retailers Prefer Cash or Credit Cards?

Some retailers prefer cash, while others prefer credit cards. Many small businesses in the U.S. prefer cash because there aren’t any transaction fees associated with it. Some retailers prefer 澳洲幸运5开奖号码历史查询:credit cards,🌜 however, especially online♛ businesses that don’t operate physical storefronts. 

The Bottom Line

Credit card payment processing is a surprisingly complex series of events, and credit card networks are key players in that process. Indeed, credit card networks themselves drive a large part of the cost of using credit cards, which is one of the biggest differences between networks. For that reason, government regulators have been placing limits on credit card fees in recent years to help keep things fair for consumers and business owners.

Article Sources
Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.
  1. Congressional Research Service. "."

  2. Congressional Research Service. "."

  3. Federal Trade Commission. "."

  4. Nilson. "."

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