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🇺🇸 United States / Credit Cards
APR comparison, payoff, balance transfer, and utilization calculators using real US credit card rates. Average APR hit ~21.5% in 2024 per Fed data.
8 calculators
Compare the true annual cost of multiple credit cards side by side. See exactly how APR, fees, and rewards affect what you pay or earn over 12 months.
Find out how much you save by moving credit card debt to a lower-rate card. Factors in transfer fees, promotional periods, and the rate after the intro offer ends.
See how a credit limit increase changes your utilization ratio across all cards and what it means for your credit score before you request it from your issuer.
Project monthly interest charges on your balance given your APR and payment amount. See how new purchases change what you'll owe at the end of the month.
See how long it takes to clear your balance making only minimum payments, the total interest cost over that period, and how much you save by paying more each month.
Enter your balance, APR, and planned monthly payment to see exactly when your credit card will be paid off and the total interest you'll pay.
Estimate annual cash back or points value from your spending, factor in the annual fee and sign-up bonus, and find the monthly spend needed to break even on the fee.
Calculate your credit utilization ratio across all cards, see how it compares to FICO thresholds, and find exactly how much to pay down to reach 30% or 10% utilization.
The average US credit card interest rate hit approximately 21.5% APR in late 2024, the highest on record, according to Federal Reserve G.19 consumer credit data. This makes carrying a balance extremely costly: a $5,000 balance at 20% APR, with only minimum payments of 2% of the balance (or $25, whichever is higher), takes over 20 years to pay off and accrues more than $7,000 in interest, more than the original balance. Paying a fixed $200/month on that same balance clears the debt in under 3 years and costs roughly $1,400 in interest.
Credit utilization, the ratio of your outstanding balance to your total credit limit, is the second most influential factor in FICO scoring, accounting for approximately 30% of the score. Keeping utilization below 30% is the commonly cited threshold, but research indicates that consumers with scores above 800 typically maintain utilization below 10%. A balance transfer can reset high-interest debt to 0% for 12–21 months, but most issuers charge a 3–5% transfer fee upfront. On a $10,000 balance at 21% APR, even a 5% transfer fee ($500) is recovered in roughly 4 months compared to making interest-only payments.
The CARD Act of 2009 introduced significant consumer protections: issuers must give 45 days' notice before rate increases, apply payments above the minimum to the highest-APR balances, and prohibit over-limit fees without opt-in. Rewards cards typically carry higher APRs (23–29%) than no-rewards cards, so the math on rewards programs only works in the cardholder's favor when the balance is paid in full each month. A 2% cash-back card earning $200/year on $10,000 in spending delivers negative net value if even $1,000 is carried at 24% APR.
US credit cards operate under a unique open-loop network duopoly (Visa/Mastercard) with interchange fees averaging 1.5–2.5%, which are largely absent in markets like Australia (RBA interchange caps) or the EU (0.3% cap under EU regulations). This higher interchange funds the outsized rewards programs common in the US market, including airline miles, hotel points, and cash-back programs that are far richer than those available in comparable markets. The US also lacks a centralized credit register; instead, three private bureaus (Equifax, Experian, TransUnion) maintain independent files, meaning errors on one bureau do not automatically propagate to the others and consumers must dispute separately with each.