Credit Card Interest Calculator
Calculate how much interest you'll pay on your credit card debt and find your payoff date. See the real cost of carrying a balance with our free credit card interest calculator.
How This Calculator Works
Our credit card interest calculator helps you understand the true cost of carrying a credit card balance. Simply enter your current balance, annual percentage rate (APR), and how much you plan to pay each month. The calculator shows you how long it will take to pay off your debt, how much total interest you'll pay, and your total payoff amount.
You can also compare your payment plan against making only minimum payments to see how much money you'll save by paying more. This credit card payoff calculator uses standard US credit card interest calculations, where interest compounds daily based on your average daily balance.
How Do I Calculate Interest on My Credit Card?
Credit card interest is calculated using your APR (Annual Percentage Rate), which is divided by 365 to get your daily periodic rate. Each day, interest is calculated on your average daily balance and added to your account. Most credit cards in the US have APRs ranging from 18% to 30%, with the average around 22%.
For example, if you have a $5,000 balance at 22% APR, your daily interest rate is about 0.06% (22% ÷ 365). That means you're paying roughly $3 per day in interest, or about $90 per month, just to carry the balance. Our calculator does all this math for you and shows how increasing your monthly payment can dramatically reduce your total interest cost.
What Is the Minimum Payment Trap?
The minimum payment trap is when you only pay the minimum amount required each month. While this keeps your account in good standing, it means you're mostly paying interest and very little principal. On a $5,000 balance at 22% APR with a 2% minimum payment ($100), it would take over 8 years to pay off and cost you more than $4,500 in interest.
By paying just $50 more per month ($150 total), you'd pay it off in about 3.5 years and save over $2,000 in interest. Our calculator lets you compare minimum payment scenarios to see exactly how much the minimum payment trap costs you. The key is paying more than the minimum whenever possible.
How Long Will It Take to Pay Off My Balance?
Your payoff date depends on three main factors: your current balance, your APR, and how much you pay each month. The higher your balance and APR, the longer it takes. The more you pay monthly, the faster you'll be debt-free.
Our calculator shows you the exact payoff timeline for your situation. You can experiment with different monthly payment amounts to see how much faster you could pay off your debt. Even small increases in your monthly payment can save months or years of payments and hundreds or thousands in interest.
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This calculator is for educational purposes only and does not provide financial advice.
Frequently Asked Questions
How do I calculate interest on my credit card?
Credit card interest is calculated daily using your APR divided by 365. Each day, interest is applied to your average daily balance. For example, a $5,000 balance at 22% APR accrues about $3 per day in interest. Our credit card interest calculator does this calculation for you and shows your total interest cost over time based on your monthly payment amount.
What is the minimum payment trap?
The minimum payment trap occurs when you only pay the minimum required amount each month. While this keeps your account current, most of your payment goes toward interest, not principal. This means it takes years to pay off even small balances, and you end up paying far more in interest than the original debt. Our calculator shows you exactly how much the minimum payment trap costs compared to paying more each month.
How long will it take to pay off my balance?
Your payoff date depends on your balance, APR, and monthly payment. Use our calculator to see your exact timeline. For example, a $5,000 balance at 22% APR takes about 3.5 years with $150 monthly payments, but over 8 years with minimum payments. Increasing your payment by just $50 per month can save years and thousands in interest.