Credit card issuers determine your credit limit using your payment history, income, and more

Some credit card issuers also take your other payment obligations into account when determining your credit limit, such as the cost of your rent or alimony.

Algorithms built to detect credit card fraud can deny charges if they perceive the attempted purchase is unfamiliar or unusual based on historical data, even when a person has enough credit to make the purchase.

An explanation of hard credit checks vs. soft credit checks

Some buy now, pay later services do a soft credit check rather than a hard credit check, like credit card companies would do when someone applies for a card. While hard credit checks can impact your credit score, soft pulls typically do not.

Financial institutions use 'Know Your Client' standards to prevent money laundering

KYC standards include verifying customers' identities and conducting regular account checks for high-risk clients to avoid money laundering schemes. These standards obligate banks to report suspicious customers and activity.

Credit card companies make money through interest, annual fees, and more

They also profit from interchange fees, the fee the retailer has to pay the credit card network in order to facilitate a transaction. The fee is typically between 1% and 3% of the transaction amount.

Card issuers are financial institutions that open credit to customers, while card networks facilitate purchases between merchants and customers

Card issuers give customers credit cards, set rate limits, and collect payments. Card networks, on the other hand, dictate where credit cards can actually be used by managing relationships between the network and merchants. These networks make money on interchange fees, which merchants pay to accept a specific card network at their stores.

Gas stations top the list of riskiest places to use a debit card

Unlike credit cards, debit cards withdraw funds directly from your checking account, and federal laws provide fewer consumer protections against debit fraud. Gas station "skimmers" and long periods of separation from the card at restaurants are some of the more vulnerable spots for use.

Credit limits can be lowered as well as increased

Some common reasons for someone's credit limit being lowered include missed payments, an inactive account, and more.

Why there are microchips in credit cards

Credit cards have evolved significantly since their invention in 1950, but security lagged in the US for years. Despite handling only a quarter of global transactions, the US once accounted for half of all credit card fraud. The 2013 Target data breach helped push the adoption of chip cards, reducing fraud but shifting risks to online scams.

Watch a video that visualizes what really happens inside a credit card network when you make a purchase.

The Consumer Financial Protection Bureau is looking closely at BNPL

Given the lack of data around BNPL services in comparison to other financial products such as credit cards, the CFPB has conducted research to better understand BNPL products and how they could harm and benefit consumers.

Privacy concerns in the credit scoring system

Because credit scores use a lot of personal information (such as whether or not someone makes credit card payments on time), some worry their privacy is being compromised in the data collection process.

Managing too many credit cards can be costly if they have annual fees

However, canceling cards must be strategic if it becomes necessary, as it can negatively impact your credit score. Before canceling, experts suggest asking if it's possible to downgrade to a no-annual-fee version in order to keep the account open, thus preventing potential hits to your credit score.

Merchants have to pay credit card transaction fees each time a card is swiped

Credit card networks such as Visa, Mastercard, and American Express must calculate fees for not only the customer, but also the merchant in every transaction.

Listen to a podcast episode from 1440's editor in chief that explains how a credit card transaction works behind the scenes.

When you buy even something as small as a $5 latte, a global relay between banks and networks like Visa and Mastercard is triggered. It all started with a 1958 campaign from Bank of America that jump-started the credit card revolution.

Affirm's COO recently said that the company believes the credit card is 'going the way of the VHS tape'

Some people use buy now, pay later apps as an alternative to credit cards. BNPL services have a lower barrier to entry than credit cards—many frequent BNPL users have low credit scores.

American Express intentionally targets wealthy cardholders, who spend higher amounts per transaction and tend to make more transactions than the average cardholder, thereby reducing the company's risk.

Master the banking basics

Before deciding on a credit union, it’s important that you understand the basics. That way you can know exactly what’s happening with your hard-earned money behind the scenes. Flip through these flashcards to make sure you understand key terms like “deposit” and “checking account.” Then, you can read up on top banking products and start to find a credit union that works for you. Click here, then scroll down the page to find the cards.

Why consumers could soon see the impact of buy now, pay later loans on their FICO credit scores

FICO rolled out its first-ever BNPL-specific credit scoring models in June 2025. While missed installments can now negatively impact a credit score, there's also the potential for on-time BNPL installment payments to help boost scores.

Payday lenders usually require borrowers to post-date a check or provide access to an electronic bank account

If borrowers can't pay back the loan, they can be subject to overdraft fees from their bank and other fees from the payday lender—further exacerbating the debt borrowers face.

AI could be increasing the opportunities for financial fraud

Systems that can reproduce near perfect counterfeits of legitimate financial documents are increasingly prevalent and sophisticated. The international Association of Certified Fraud Examiners estimate organizations lose about 5% of revenue to fraud each year.

Rewards credit cards can offer points, travel miles, and more

For every dollar that a cardholder spends on a rewards credit card, they can also receive benefits such as cash back, airline miles, and more. For many, rewards are the reason they make so many purchases on credit cards in the first place.

Microchips in payment cards improve security by generating unique transaction codes

Magnetic strips store unchanging data that is easily cloned, but microchips act as miniature computers that encrypt sensitive data. They also resist fraud by creating data unique to each transaction, preventing duplication.

Five primary factors determine your credit score

Your credit history is used to calculate your credit score. It includes information such as how often you miss payments (on credit cards, for instance), the types of financial accounts you hold, how long you’ve held those accounts, and more.

Some banks derive half of their income from overdraft fees on checking accounts

The fees are incurred when a customer withdraws more money than is left in the account, typically around $35 per overdraft. One in 11 Americans pays more than $350 a year in such fees, generating tens of billions of dollars each year for banks..

How to check your credit score

Contrary to popular belief, checking your credit score doesn’t hurt your credit. Many credit card companies show your score when you log into their app online, but there are other ways to check it.

American Express runs on a 'spend-centric' model, using perks and merchant fees to drive profit

American Express cardholders tend to spend more money per transaction than other credit card users, which makes the interchange fees merchants have to pay to accept American Express cards worth it while incentivizing other companies to pay the interchange fee as well.

Buy now, pay later loans from 'BNPL' companies—which allow online shoppers to buy something immediately and pay for it in installments—are becoming more popular, with nearly half of millennials and Gen Zers using them.

Why American Express charges merchants more than other card companies to accept AmEx

Each card network charges merchants a discount rate, which is a fee merchants pay to accept cards. American Express charges higher discount fees than competitors like Visa and Mastercard as the business is more reliant on fees for operation.

Customers wrote just one check a year in 2024, on average

Major retailers like Target have stopped accepting checks in recent years as real-time payment systems are increasingly being implemented across the US. This shift is considered an improvement in safety—as checks are vulnerable to fraud—but can lead to some exclusion for those without access to digital devices.

Bank of America helped establish Visa as a global credit card network business after it rolled out its first credit cards.

At the time, those credit cards were called "BankAmericards." Today, Bank of America owns less than a 2% share of Visa—many other banks (as well as institutional investors) help govern and profit from the network.

Old credit cards can be made into guitar picks, phone stands and more

Experts recommend always cutting through the chip and the card number when disposing of expired credit cards, as the magnetic strip, the chip, and the card number all contain information that thieves might be interested in.

The BNPL industry boomed amid a surge in online shopping during pandemic-era lockdowns

The buy now, pay later industry allows consumers to buy something immediately and pay in installments without the need for lengthy application and approval processes or high credit scores—and fintech companies Affirm, Klarna, and Afterpay are leading the charge by targeting young adults.

American Express charges merchants more than other card companies to accept AmEx, making Visa a more accessible option for many merchants.

Each card network charges merchants a discount rate, which is a fee merchants pay to accept cards. American Express charges higher discount fees than competitors like Visa and Mastercard as the business is more reliant on fees for operation.

Why Americans are drowning in credit card debt

Americans owe more than $1T to credit card companies. And with rising interest rates that prevent cardholders from paying down debt (not to mention the rising cost of living), that number is likely to keep growing. A podcast episode explains how the US got here, and what policymakers and individuals can do about it.

American Express is both a card issuer and a processing network

Unlike most credit card companies, American Express issues credit cards and processes payments—something called a closed-loop model. By offering both services, American Express profits from both interest and interchange fees, and also has access to more data on how customers spend their money so it can offer better perks.

Chip technology replaced magstripes to stop easy card cloning and fraud

The magstripe on bank cards always gives the same data, making it simple to copy using a device called a grabber. In contrast, embedded chips create a unique code with every transaction, making it much harder to clone or steal card information.

Visa, the first credit card network, still dominates competitors with a roughly 52% market share by purchase volume.

Among the major credit card companies in the US, Mastercard had about 25% of the market share in 2025. American Express had roughly 20%, and Discover had the smallest market share of about 4%.

Near-universal banking masks a large underbanked shadow system

FDIC data indicates 128 million households have a checking account, the vast majority (96% in 2024). But more than 14% of households are underbanked, meaning they have accounts but also rely on nonbank services such as check cashing, payday loans, or prepaid cards.