You look at your credit card statement and see an APR of 24%, 28%, or even higher.

Then you look at a mortgage, car loan, or savings account and wonder:

Why is credit-card borrowing so expensive?

A mortgage might have a much lower interest rate because the loan is secured by a house. A car loan is backed by a vehicle. A credit card, by contrast, generally lets you borrow without putting a specific asset up as collateral.

But that isn't the whole story.

Credit-card interest rates have also remained unusually high because issuers add a substantial APR margin on top of benchmark rates. The CFPB found that the average APR on credit-card accounts assessed interest rose from 12.9% in late 2013 to 22.8% in 2023, while the average APR margin also reached a record level.

So why does your credit card cost so much more than many other forms of borrowing?

The answer has less to do with one interest rate and more to do with how credit cards are designed, priced, and used.

A Credit Card Is a Very Different Kind of Loan

Imagine borrowing $20,000 in two different ways.

With a traditional secured loan, the lender may know exactly what the money is being used for and may have an asset it can claim if the borrower defaults.

A credit card works differently.

You receive a revolving credit line.

You can borrow.

Pay some of it back.

Borrow again.

Pay again.

There isn't necessarily a specific asset securing every dollar you owe.

From the lender's perspective, that creates a different type of risk.

The CFPB notes that credit-card rates are generally higher than loans backed by collateral such as a home because the lender does not have the same security if the borrower doesn't repay.

That helps explain part of the difference.

But there is another important part.

Credit Cards Are Designed to Let You Borrow Again and Again

A mortgage is usually created for one large purchase.

An auto loan is generally connected to one vehicle.

A credit card is an ongoing borrowing facility.

You might use it for:

$50 of groceries.

$200 of clothing.

$1,000 of travel.

$3,000 of emergency expenses.

Then you repay some of it and use the card again.

That flexibility has value.

You aren't required to apply for a new loan every time you need another $500.

The lender is effectively keeping borrowing capacity available for you.

That convenience comes with pricing.

The Interest Rate Isn't the Whole Story

When people see a credit-card APR of 25%, they often assume:

25% = the bank's profit.

That's not correct.

An APR is the price charged to the borrower, not simply pure profit.

Credit-card issuers have costs associated with:

Funding the money they lend.

Processing transactions.

Operating the card network and account.

Fraud losses.

Credit losses.

Customer acquisition.

Rewards and promotional offers.

Servicing accounts.

Regulatory and compliance costs.

And, importantly, borrowers who don't repay can create losses.

The price of the card has to reflect those economics.

However, research from the CFPB suggests that risk alone doesn't explain the entire size of credit-card APRs.

That's where the story gets more interesting.

Your Credit Card APR Usually Has a Benchmark Plus a Margin

Many credit-card APRs are variable.

That means the rate can be tied to an index, such as the prime rate.

The CFPB explains that a variable APR changes when its underlying index changes, according to the terms of the card agreement.

A simplified way to think about it is:

Credit-card APR = benchmark rate + issuer's margin

For example, imagine a hypothetical card with:

Prime rate: 8%

Issuer margin: 17%

The resulting APR could be around:

25%

The exact calculation depends on the card agreement.

Now notice something important.

If the benchmark falls from 8% to 6%, the APR doesn't necessarily fall to 6%.

The margin remains.

So even when broader interest rates decline, credit-card borrowing can remain expensive.

The Margin Is the Part Many People Never Notice

This is one of the most interesting findings from the CFPB.

In its analysis, the CFPB found that average credit-card APR margins increased substantially over the decade leading to 2023. It estimated that roughly half of the increase in average credit-card rates over that period came from higher APR margins rather than movements in the benchmark rate alone.

That matters because it challenges a common assumption:

“Credit-card rates are high simply because the central bank raised rates.”

Central-bank policy can absolutely affect borrowing costs.

But it isn't the complete explanation.

The price charged by the card issuer matters too.

Why Would a Bank Charge Such a Large Margin?

Because credit-card lending has an unusual combination of characteristics.

It is:

Unsecured

Revolving

Convenient

Available without a new loan application for every purchase

And highly dependent on consumer repayment behavior.

When someone pays the entire balance every month, the issuer may collect little or no purchase interest because many cards provide a grace period for purchases.

When someone carries a balance from month to month, the economics change dramatically.

Interest becomes a major source of revenue.

The CFPB reported that interest income is a major source of revenue for credit-card issuers and that revolving balances have historically generated strong returns for banks.

The People Who Carry Balances Are Extremely Important to the Business Model

This is the part that's easy to miss when looking at credit cards.

Suppose a customer has a $5,000 balance.

At a hypothetical 24% APR, the simple annualized interest rate suggests roughly:

$1,200 in interest over a year

before accounting for the way interest is actually calculated and changes in the balance.

A customer who pays the card off every month may generate transaction-related economics, fees, or other revenue for the issuer.

But a customer who continuously revolves a balance can generate substantial interest revenue.

This is why the economics of credit cards look very different from a checking account.

The issuer isn't just providing a payment tool.

It is also providing a revolving line of credit.

Why Don't Banks Simply Lower the APR to Attract More Customers?

Because customers don't choose credit cards based only on APR.

They also care about:

Rewards.

Cash back.

Travel points.

Sign-up bonuses.

Convenience.

Acceptance.

Credit limits.

Promotional financing.

Mobile apps.

Brand.

Fees.

Balance-transfer offers.

This creates an unusual market.

A consumer might choose a card with a higher regular APR because they never expect to carry a balance and care much more about rewards.

The issuer knows that too.

The result is that the advertised APR isn't necessarily the most important feature for every customer.

Large Banks Can Also Have Higher Credit-Card Rates

This gets even more interesting.

You might assume that competition automatically forces every bank to charge roughly the same rate.

But the CFPB reported in 2024 that the 25 largest credit-card issuers charged interest rates roughly 8 to 10 percentage points higher than smaller and medium-sized banks and credit unions, regardless of credit risk in its analysis.

The difference can be enormous.

For a borrower carrying a large balance, several percentage points can translate into hundreds of dollars every year.

That means shopping around can matter.

Your Credit Score Still Matters

Although credit-card pricing isn't explained entirely by credit risk, your own credit history can influence the rate you receive.

The CFPB says credit-card companies may use information from your application and credit history to determine the interest rate they offer. Consumers with higher credit scores generally receive better rates from a lender when multiple rates are offered.

So two people can apply for similar cards and receive different pricing.

One person might receive:

20% APR

while another receives:

29% APR

depending on the lender's pricing and the applicant's credit profile.

But a Good Credit Score Doesn't Guarantee a Cheap Card

This is another common misunderstanding.

You might have excellent credit and still receive a credit card with a high regular APR.

Why?

Because the card's pricing structure matters too.

The CFPB found that higher APR margins had increased across credit-score tiers, including among consumers with very high scores.

So:

Good credit ≠ automatically low credit-card APR.

It can improve your odds of qualifying for better terms.

But the product itself still matters.

Why Credit Cards Are More Expensive Than Mortgages

This comparison makes the difference easier to understand.

Mortgage

A mortgage is generally secured by real estate.

If the borrower doesn't repay, the lender has a claim on the property.

The loan is usually large.

The repayment schedule is structured.

The lender has an asset providing security.

Credit card

A credit card is generally unsecured.

The borrowing is revolving.

You can borrow repeatedly.

The balance can change every month.

The lender doesn't have a specific piece of property securing the balance.

That difference makes the two products fundamentally different.

The CFPB specifically notes that credit cards generally carry higher interest rates than borrowing options secured by assets such as a home.

Why Credit Cards Are More Expensive Than Auto Loans

The same principle applies to cars.

An auto loan is typically secured by the vehicle.

A credit card doesn't give the bank a claim on the specific thing you purchased with the card.

Buy a television with a credit card and fail to repay your balance.

The bank generally can't simply take that television because it financed it.

That's different from a secured auto loan.

More lender protection generally means less need to charge for the same level of risk, although actual rates depend on many factors.

Credit Cards Have Another Advantage for Consumers

There is a reason people accept the high rate.

You usually don't pay it when you pay your purchases in full under the card's terms.

The CFPB explains that many cards provide a grace period for purchases, allowing a cardholder to avoid purchase interest by paying the balance in full by the due date.

That changes the economics considerably.

A card might advertise:

27% APR

but a customer who pays the statement balance in full may pay:

$0 in purchase interest.

The expensive rate mainly matters when the balance revolves.

That distinction is crucial.

What Happens When You Carry a Balance?

This is where credit cards can become extremely expensive.

Many issuers calculate interest daily using an average daily balance method.

The CFPB explains that many credit-card companies calculate interest based on the average daily account balance and that interest can accrue daily rather than simply being charged once at the end of the month.

That means carrying a balance isn't like simply paying a one-time borrowing fee.

Interest keeps accumulating.

And as long as the balance remains outstanding, you're paying for the privilege of using that borrowed money.

Here's Why Minimum Payments Can Make the Problem Worse

Suppose your credit-card balance is:

$5,000

You make the minimum payment.

You might feel:

“I'm handling the debt.”

Technically, you are making payments.

But the balance could take much longer to disappear because part of your payment goes toward interest and other finance charges rather than reducing principal.

The CFPB has warned that persistent revolving balances can leave consumers paying significant amounts in interest while making relatively slow progress against the principal.

This is one reason a high APR becomes much more painful over time.

The Real Cost Isn't 25% on Day One

Imagine you owe:

$5,000

at:

25% APR

A simple approximation would put the first year's interest around:

$1,250

if the balance stayed unchanged and before considering the issuer's actual daily calculation.

But real credit-card balances usually change.

You make payments.

You make new purchases.

Interest accrues.

The balance moves.

So the actual amount you pay depends on how the account is used and how quickly you reduce the balance.

That is why APR is useful for comparing borrowing costs, but your actual financial cost depends on the balance and repayment behavior.

Why a 0% APR Offer Can Still Make Sense for the Bank

This is where credit-card pricing becomes even more clever.

You might receive:

0% APR for 12 months

and wonder:

“How can the bank make money if it isn't charging interest?”

Because interest isn't the only possible source of revenue.

A card issuer can potentially earn money from:

Interchange revenue

Annual fees

Balance-transfer fees

Late fees

Interest after the promotional period

And customers may keep the card after the introductory offer expires.

Promotional pricing can therefore be a way of acquiring customers rather than simply giving away credit permanently.

Why Your Credit Card APR Doesn't Necessarily Move With Every Rate Change

Suppose the central bank reduces benchmark interest rates.

You might expect your credit-card APR to immediately fall by the same amount.

That may not happen in the way you expect.

For a variable-rate card, the APR generally changes according to the index and the terms specified in the agreement.

The CFPB explains that variable APRs change with their underlying index, while the card agreement specifies how those changes work.

And remember:

Benchmark rate ≠ total APR.

There is still the issuer's margin.

The Biggest Mistake Is Looking Only at the APR

APR is important.

But consumers should also look at:

Annual fees

Balance-transfer fees

Cash-advance APR

Penalty terms

Promotional APR expiration

Foreign transaction fees

Late fees

Rewards conditions

One card offering:

21% APR

isn't automatically cheaper for you than another offering:

24% APR

if the fee structures and the way you use the cards are completely different.

The right comparison depends on your actual behavior.

Cash Advances Are a Different Story

Credit cards can have different APRs for different types of transactions.

The CFPB explains that card issuers can charge different rates for purchases, cash advances and other categories, depending on the card's terms.

That means taking cash from your credit card isn't necessarily the same as making a normal purchase.

This distinction is easy to overlook because both appear on the same card statement.

Why the Credit Card Company Doesn't Care Whether You Feel the APR Is "Too High"

From the issuer's perspective, the interest rate is part of a larger pricing equation.

The company is trying to balance:

Credit risk

Funding costs

Operating costs

Expected losses

Customer acquisition

Rewards

Competition

Profitability

The consumer sees one number:

27.99%

The issuer sees an entire portfolio of millions of accounts with different behaviors.

Some customers pay in full.

Some revolve balances.

Some default.

Some transfer balances.

Some close accounts.

Some spend heavily.

The rate is set with the whole portfolio in mind.

And This Is Why Shopping Around Matters

One of the most useful findings from the CFPB's credit-card research is that large differences can exist between issuers.

In its 2024 analysis, the CFPB said switching to a lower-rate card could save an average borrower hundreds of dollars per year, and it found substantial rate differences between large issuers and smaller banks and credit unions.

That leads to a simple lesson:

Don't assume your current APR is the market price.

It is the price your card issuer is charging you.

Those are not necessarily the same thing.

What Should You Do If Your Credit Card APR Is Very High?

First, check whether you actually pay that interest.

If you pay the full statement balance every month and your card has a grace period, the regular purchase APR may matter much less than the card's other features.

But if you regularly carry a balance, the APR deserves much more attention.

Compare alternative cards or borrowing products.

Ask your issuer whether a lower rate is available.

Look at balance-transfer offers carefully.

And compare the total cost, not just the headline APR.

The CFPB recommends comparing APRs when evaluating borrowing products because APR incorporates interest and certain fees into a standardized measure of borrowing cost.

What a High Credit-Card APR Is Really Telling You

A 27% APR doesn't necessarily mean:

“The bank expects you to fail.”

And it doesn't necessarily mean:

“The bank is making 27% pure profit.”

It tells you that revolving credit on that product is expensive.

The rate reflects a combination of:

Unsecured lending

Revolving credit

Risk

Benchmark interest rates

Issuer margins

Operating economics

Market competition

and the business model surrounding credit cards.

The CFPB's research is particularly interesting because it suggests that increased issuer margins have played a major role in the rise of credit-card APRs, rather than benchmark interest rates being the only explanation.

The Question You Should Ask Is Not "What's My APR?"

The better question is:

“What does this APR actually cost me based on how I use this card?”

If you spend $1,000 and pay it off every month under a grace period, the purchase may generate no interest.

If you carry $10,000 for years, the exact same card can become an extremely expensive way to borrow money.

That's why the financial impact of a credit card isn't determined by the APR alone.

It's determined by:

APR × balance × time

plus applicable fees and the way the account is managed.

The Bottom Line

Credit-card APRs are so high compared with many other interest rates because credit cards are a fundamentally different type of borrowing.

They are generally:

Unsecured

Revolving

Convenient

Flexible

and continuously available.

But there is more to the story than risk.

Credit-card APRs often combine a benchmark rate with a substantial issuer margin, and CFPB research found that higher APR margins accounted for a significant portion of the rise in credit-card rates over the decade through 2023.

Your credit history can affect the rate you are offered, but even consumers with very strong credit can face relatively high APRs.

And because many credit cards have grace periods, someone who pays the full statement balance each month may avoid purchase interest entirely, while someone carrying a balance can face substantial interest charges that accumulate over time.

So the next time you see a credit card advertising a rate that looks absurdly high, remember:

You're not looking at the cost of every credit-card transaction.

You're looking at the price of carrying borrowed money on that account.

And that difference can determine whether a credit card is a convenient payment tool—or a very expensive loan.

Sources

Consumer Financial Protection Bureau — Credit Card Interest Rate Margins at All-Time High

Analysis of credit-card APRs, issuer margins, profitability and the factors behind rising credit-card rates.

Consumer Financial Protection Bureau — Examining the Factors Driving High Credit Card Interest Rates

Research on credit-card risk, charge-offs, margins and issuer profitability.

Consumer Financial Protection Bureau — Large Banks Charge Higher Credit Card Interest Rates

Analysis showing substantial rate differences between the largest issuers and smaller banks and credit unions.

Consumer Financial Protection Bureau — Fixed vs. Variable APR

Explanation of variable APRs and benchmark indexes.

Consumer Financial Protection Bureau — How Credit Card Interest Is Calculated

Explains average daily balances, grace periods and different APR categories.

Consumer Financial Protection Bureau — Credit Card Interest Rate Offers

Explains how credit history and other application information can affect the rate offered by a card issuer.

Consumer Financial Protection Bureau — Interest Rate vs. APR

Explains the difference between an interest rate and APR and why APR is useful when comparing borrowing costs.

Disclaimer

The information published by The Margin Stream is intended for general informational and educational purposes only. It does not constitute personalized financial, credit, lending, investment, tax, legal, or other professional advice. Credit-card terms, APRs, regulations, fees, and lending practices vary by issuer, jurisdiction, and individual circumstances. Readers should review their own card agreements and compare current offers carefully before making financial decisions.

Muhammad Akif

Founder & Editor

The Margin Stream