(905) 441 0770 allen@allenehlert.com

How Credit Cards Work

by | April 8, 2025

The credit card industry is a multi-billion-dollar arena dominated by powerful players like Visa, American Express, and Discover. Dive into the intricacies of how credit cards work, the business models of these industry giants, and the impact of credit scoring on consumers.

Visa’s Dominance: A Market Behemoth

Visa’s establishment as a national credit card by the Bank of America in 1958 paved the way for its unparalleled dominance, garnering over 60% of purchases in the payment card industry. It introduced its first debit card in 1975. It went public as VISA Inc. in 2008, raising 17.9 billion in the largest IPO to date. Today, VISA has approximately 3.4 billion cards in the market across 200 countries and jurisdictions. The company’s colossal revenue comes from transaction fees, raking in around $0.25 for every $100 spent and boasting profit margins of 30–40%, dwarfing the 2-4% profit margins of the retail industry. VISA recorded a purchase volume of $4.17 trillion in the US in 2020, according to a 2021 Nilson report.

Merchants Dislike Credit Cards

Many merchants complain that they have been exploited by credit card companies because they claim they have no choice but to rely on credit card companies for payment. They claim that the lack of competition in the credit card space enables companies like VISA to charge them too much for transactions—fees that either hurt their profitability or costs that have to be added to prices for customers.

VISA Credit Cards

Challenges and Revenues: The Visa Conundrum

Visa’s staggering revenue of over $21.8 billion in 2020 is fueled by data processing fees, service revenues, and the much-debated swipe fees. Legal challenges and antitrust litigation have amounted to concerns about Visa’s market power and the impact of hefty swipe fees on merchants.

How Does VISA Make Money?

VISA doesn’t make any money from the interest fees charged to customers; rather, those fees are charged by the card issuer, which is usually a bank. This enables VISA to face none of the risks, like default risk, that come with lending money. VISA does not have any relationship with individual consumers, that relationship is with the bank that issues the card. So when you get a VISA card that comes from the Royal Bank, for example, this is the Royal Bank’s card, not VISA’s card, VISA is the network that supports transactions behind the card.

39% of VISA’s revenue comes from processing fees, 34% comes from service revenues, which are charges VISA makes on the banks for working with VISA payment methods, 22% is for international transaction revenues, and the remaining 5% is for other payment methods, which are a growing part of their business.

The Four-Party Model.

VISA relies on what is known as the Four-Party Model. When you buy something with a VISA card, there are 4 entities that make the card work. First, you, the customer, make a purchase. The second is the bank holding your money. Third is the store selling you a product. Fourth is VISA which connects all of those parties to facilitate the transaction. VISA is essentially a physical network, not unlike a telephone network, that connects about 18,000 financial institutions.

Also Read:

The Amex Experience: Tailored Rewards and Market Strategy

American Express, with its affluent customer base, utilizes a spend-centric model and closed-loop system to offer custom rewards and specialized offers. Furthermore, the company targets millennials and underbanked Americans to diversify its customer base, and has made strategic investments in targeting Gen Z and millennials through unique experiences like exclusive concerts.

Credit Scores: The Consumer Credit Ecosystem

Canada runs on credit. A person’s three-digit credit score represents how likely they are to pay their bills. Your credit score impacts almost every aspect of your financial life. Essentially, it is your financial life passport that enables you to do almost everything you need to do as an adult, from accessing credit to getting a credit card to getting a mortgage to getting a reasonable car loan to even getting a place to rent. Today, most landlords do a credit check on prospective tenants. Even some employers and insurance companies use your credit score for a variety of reasons. 42% of people have been denied a financial product in the past due to an insufficient credit score. Life becomes more expensive and difficult as your credit score falls.

The credit scoring system today is flawed. Others disagree and say our system is the best in the world and that criticism mostly comes from a lack of understanding around how credit scores are calculated and how they are applied. They argue that a world without credit scores would be much more expensive and fraud would be out of control.

Conclusion

The credit card industry is a dynamic landscape shaped by the strategies and challenges of key players like Visa, American Express, and Discover. From the complexities of swipe fees to the significance of credit scores, understanding the inner workings of the credit card industry is critical for consumers and businesses alike.

Mortgage and Money Radio Logo
Allen Ehlert

Allen Ehlert

Allen Ehlert is a licensed mortgage agent. He has four university degrees, including two Masters degrees, and specializes in real estate finance, development, and investing. Allen Ehlert has decades of independent consulting experience for companies and governments, including the Ontario Real Estate Association, Deloitte, City of Toronto, Enbridge, and the Ministry of Finance.

Commercial 101

Commercial Mortgage 101

When you hear people talking about mortgages, they’re usually chatting about homes — houses, condos, maybe even a cute little duplex. But there’s a whole other world of financing out there: commercial mortgages. And let me tell you, it’s a different beast altogether. Whether you’re looking to buy your own storefront, scoop up an apartment building, or finally invest in that industrial unit your buddy keeps bugging you about, understanding how commercial mortgages work is absolutely crucial.

Commercial Mortgages

Finding A Commercial Mortgage in Canada

When it comes to commercial mortgages, most people think the only place to go is the bank. You walk in, shake a hand, sign some papers, and walk out with financing for that office building, warehouse, or rental property you’ve had your eye on. Sounds simple, right? Well… not quite.

Mortgage Penalty Calculators

Ultimate Canadian Mortgage Penalty Calculator

Canadian Mortgage Penalty Calculators: Here’s the thing about mortgages: they look nice and tidy on paper, but the moment you want to change anything—refinance, renew early, sell before your term is up—you’ve technically “broken” your mortgage. And when you break your mortgage, you’re not walking away scot-free. You’re on the hook for a penalty.

Commercial Rate

Why Your Commercial Mortgage Rate Isn’t Set in Stone

When it comes to mortgages, most people are laser-focused on one thing: the rate. And fair enough — no one wants to pay more interest than they have to. But if you’re shopping for a commercial mortgage, you’ll quickly realize the question isn’t just “What’s the rate?” — it’s “How is this rate being calculated in the first place?”

Mortgage Free Accelerator

Ultimate Canadian Mortgage-Free Accelerator Calculator

Use the Ultimate Canadian Mortgage-Free Accelerator Calculator to manipulate all the levers available in a mortgage to pay off your mortgage and become mortgage free as fast as possible.

Mortgages Appraisals

Why Mortgages Require Appraisals

Ever wonder why, just when your client thinks they’re home free on their mortgage approval, the lender throws in the curveball: “We’ll need an appraisal.”
If you’re a realtor or a homebuyer, you’ve probably muttered under your breath, “Seriously? Why?!” Well, let’s break it down.

Ultimate Mortgage Renewal Calculator

Ultimate Mortgage Renewal Calculator

Mortgage renewal season is here, and it’s bigger than ever. Across Canada, more mortgages are coming up for renewal than at any time in history. And while many folks just sign whatever their lender puts in front of them (because, hey, life’s busy), that simple decision can cost thousands—sometimes tens of thousands—of dollars over the life of a mortgage. Don’t lose money.

Property Evaluation

Understanding Property Evaluation

Whether you’re a realtor helping clients close deals faster, or you’re a homeowner trying to wrap your head around why some appraisals cost nothing and others come with a $700 bill attached, understanding how lenders assess property value is crucial. It’s not just about the number they land on—it’s about how they get there, and how that process affects everything from closing timelines to cash out of pocket.

New Medical Pros

Mortgages for New Medical Professionals

You’ve put in the years: university, med school, residency, sleepless nights, and long shifts. Now you’re finally launching your career as a medical professional. But despite your high earning potential, buying your first home might still feel out of reach because you don’t yet have the income history that lenders usually want to see.

Being On Commission

Being on Commission

If you earn your living on commission — whether you’re a real estate agent, car salesperson, or any other commission-based professional — you already know that your income can feel like a bit of a roller coaster. Some months are stellar; others are… well, let’s just say you’re happy you put a little aside. But what does that mean when it’s time to buy a home? Or refinance? Or even just get pre-approved?