Imagine two people each owe $5,000 on a credit card. Neither makes a purchase. Neither makes a payment. After 90 days, one owes roughly $213 in interest. The other owes about $370. Same balance, same timeline, same type of product. The only difference is a three-digit number on a credit report.
That gap is not hypothetical. It follows directly from the APR ranges the Consumer Financial Protection Bureau documented in its 2025 Consumer Credit Card Market report, the most detailed public accounting of how card issuers price risk by credit score. As of spring 2026, the structural forces behind that pricing have not softened. Issuer margins remain at historic highs, and the penalty for a lower credit score is compounding literally every day. According to the Federal Reserve’s G.19 data, total revolving credit outstanding exceeds $1.3 trillion, and the CFPB has noted that a large share of the more than 170 million Americans with credit card accounts carry balances from month to month, paying interest at rates dictated by their score tier.
How credit scores sort borrowers into rate tiers
Card issuers do not assign APRs arbitrarily. They slot borrowers into rate tiers based heavily on credit scores, and federal regulators have tracked this practice for years. The Federal Reserve’s 2007 report to Congress on credit scoring, still a foundational reference on the topic, established the direct link: lower scores correlate with higher default rates, and lenders price that risk into steeper interest charges.
The practice is formalized in law. Under Regulation V (12 CFR 1022.72), creditors must send a risk-based pricing notice when they offer a consumer materially worse terms because of information in a credit report. If you have ever received one of those notices, your lender was required to tell you that someone with a stronger credit file would have gotten a better deal.
The CFPB’s 2025 report adds granularity. Its data tracks APR distributions across score bands and issuer categories, including general-purpose cards, store-branded cards, and penalty-rate products, painting the clearest publicly available picture of what different borrowers actually face. The general pattern breaks down like this:
- Superprime (scores roughly 720 and above): APRs typically land in the mid-to-high teens.
- Prime (roughly 660 to 719): APRs cluster in the low-to-mid twenties.
- Subprime (below 620): APRs frequently exceed 25%, with many cards, particularly store cards and accounts carrying penalty rates, pricing near or above 30%.
Those bands are not narrow. A borrower sitting at 625 and one sitting at 615 might see meaningfully different offers. But the broad tiers capture the reality that most cardholders experience.
What 90 days of interest actually costs by score tier
Credit card interest compounds daily. Your issuer divides the APR by 365 to get a daily periodic rate, applies that rate to your outstanding balance, and folds the resulting charge back into what you owe. Each day’s interest nudges the next day’s balance slightly higher, so the cost accelerates as weeks pass. Over 90 days, even modest APR differences produce dollar gaps that are hard to ignore.
Here is what that looks like on a $5,000 revolving balance carried for 90 days with no new purchases and no payments, using representative APRs consistent with the CFPB’s 2025 data:
- Superprime borrower (APR around 17%): Approximately $213 in interest.
- Prime borrower (APR around 23%): Approximately $291 in interest.
- Subprime borrower (APR around 29%): Approximately $370 in interest.
The subprime borrower pays roughly $157 more than the superprime borrower for carrying the exact same debt over the exact same period. Double the balance to $10,000, a figure that is not unusual for households absorbing medical bills or emergency home repairs, and the 90-day gap exceeds $300.
These figures are derived from standard daily compounding at the APR ranges the CFPB documented. They are not projections built on unusual assumptions.
Why the gap keeps widening
The cost difference between score tiers has grown, and the Federal Reserve’s benchmark rate is only part of the story. In a 2025 analysis, the CFPB found that credit card interest rate margins, the spread issuers add on top of the prime rate, have reached an all-time high. Even when the Fed holds rates steady, issuers have been independently widening the gap between their cost of funds and what they charge cardholders.
That margin expansion hits unevenly. Subprime and near-prime accounts tend to absorb the steepest increases because issuers view those borrowers as carrying the greatest default risk. The effect is a double penalty: borrowers who already pay the highest rates see those rates climb faster than borrowers at the top of the score range. For someone stuck in a lower tier, the quarterly cost of carrying a balance is not just high. It is growing relative to what a superprime borrower would pay on the same debt.
The Federal Reserve’s G.19 Consumer Credit statistical release provides the macroeconomic backdrop. Revolving credit balances remain elevated across the economy. While the G.19 does not break out rates by individual credit score, it confirms that Americans are carrying substantial card debt in an environment where the pricing of that debt has never been more score-dependent.
What the data does and does not show
Federal sources confirm the mechanism, the direction, and the trend, but they have limits worth noting. The CFPB’s figure data file, hosted on the bureau’s document server, provides APR distributions by score band but does not include a prebuilt interest calculator. The dollar figures above are derived from applying daily compounding to representative APRs within those bands, not pulled from a single published table.
There is also no public data showing exactly how often 90-day balance carries occur across different score groups. Lower-score borrowers revolve balances more frequently, a pattern the CFPB has documented repeatedly, but the precise duration and frequency are not broken out in any source reviewed for this article. A Federal Register notice from January 2026 references the CFPB’s 2025 market report but does not introduce updated rate data or new score-tier breakdowns.
Readers should treat the APR and margin findings as reflecting conditions documented through the 2025 reporting cycle. The structural dynamics (score-based pricing, wide issuer margins, daily compounding) remain firmly in place as of spring 2026, but precise rate averages may shift as the Fed adjusts policy and issuers respond.
What to do if you are carrying a balance right now
Knowing the math is useful. Acting on it is better. If you are revolving a credit card balance in April or May 2026, here are concrete steps that can shrink the interest you owe over the next 90 days.
Look up your actual APR. It is printed on every monthly statement and visible in your online account. Compare it to the averages the CFPB published for your score range. If your rate sits well above the average for your tier, you have a reason to push for something better.
Call your issuer and request a rate review. This takes about ten minutes and costs nothing. Issuers periodically reassess accounts, and if your payment history has been consistent or your score has improved since you opened the card, a lower rate may be available simply because you asked. Not every call succeeds, but the downside is zero.
Consider a balance-transfer card. Many issuers offer promotional 0% APR periods on transferred balances. Moving $5,000 from a 29% card to a 0% promotional card before the next 90-day compounding window runs eliminates the interest cost entirely during the promotional period. Transfer fees typically range from 3% to 5% of the balance, but even a $150 to $250 fee is far less than $370 in subprime interest. Read the terms carefully, especially the post-promotional rate.
Dispute errors on your credit report. Inaccurate negative information can drag your score into a lower tier and lock you into a higher APR. Under federal law, the credit bureaus must investigate disputes within 30 days. A score improvement that moves you from subprime to prime territory could save roughly $78 or more on a $5,000 balance over just 90 days, based on the APR ranges above.
Pay more than the minimum whenever possible. Every extra dollar applied to principal reduces the balance that daily interest is calculated on. Even modest additional payments early in a billing cycle can meaningfully lower the total interest charged by the end of a quarter.
The cost of carrying a credit card balance varies enormously from one borrower to the next, and the single biggest factor driving that variation is your credit score. Over 90 days, the difference between a strong score and a weak one is not abstract. It is $157 on a $5,000 balance, more than $300 on $10,000, and it compounds from there. That is money worth fighting for.
