💳 Credit Card Interest Calculator
Calculate how long it takes to pay off your credit card balance and how much interest you'll pay. Compare minimum payments vs. fixed monthly payments. See a complete amortization schedule and understand the true cost of carrying a balance.
What Is a Credit Card Interest Calculator?
A credit card interest calculator helps you understand the true cost of carrying a balance on your credit card. It calculates how long it will take to pay off your balance, how much interest you'll pay, and shows you the complete payment schedule.
Credit cards use compound interest , interest is charged on your balance each month, including any unpaid interest from previous months. This can make credit card debt extremely expensive if you only make minimum payments.
How Does the Credit Card Interest Calculator Work?
The calculator uses the standard credit card interest formula:
Minimum Payment = max(Balance × Min%, Floor)
The calculator simulates your payments month by month:
- Minimum Payment , pay the minimum required each month, which decreases as your balance decreases.
- Fixed Payment , pay a fixed amount each month until the balance is paid off.
- Target Payoff , calculate the fixed payment needed to pay off the balance by a target date.
Why Use This Credit Card Interest Calculator?
- Three Payment Modes: Compare minimum payments, fixed payments, and target payoff dates.
- Complete Schedule: See every payment with principal and interest breakdowns.
- Visual Charts: Understand the cost breakdown with a pie chart and balance trajectory.
- Warning System: Get alerts when minimum payments will take decades to pay off.
- Free & Private: No registration, no data storage , all calculations run in your browser.
❓ Credit Card Interest Calculator FAQ
How is credit card interest calculated?
Credit card interest is calculated using your daily periodic rate (APR ÷ 365) multiplied by your average daily balance. This calculator uses a simplified monthly calculation: Monthly Interest = (APR ÷ 12) × Balance.
What is a good APR for a credit card?
Good APRs vary by credit score. With excellent credit (750+), rates are typically 12-18%. With good credit (700+), expect 18-22%. With fair credit (650+), rates may be 22-28%.
What is the minimum payment on a credit card?
Most credit cards calculate the minimum payment as a percentage of your balance (typically 1-3%) or a fixed dollar amount (e.g., $25), whichever is greater.
Why does it take so long to pay off credit card debt with minimum payments?
Because interest compounds monthly and the minimum payment decreases as your balance decreases. Paying only the minimum can extend payoff by 10-25 years and cost thousands in interest.
What is the difference between fixed payment and minimum payment?
A fixed payment stays the same each month until the balance is paid off. A minimum payment decreases as your balance decreases, which means you pay less each month but take much longer to pay off the debt.
How does the target payoff mode work?
Enter the number of months you want to take to pay off your balance. The calculator will tell you the fixed monthly payment required to achieve that goal.
What is the 0% APR introductory period?
Many credit cards offer a 0% APR for the first 12-18 months. This calculator does not account for introductory periods , it assumes the APR is constant throughout the payoff period.
How accurate is this calculator?
This calculator provides accurate results based on standard credit card interest formulas. However, actual interest charges may vary based on your card's specific terms, the daily balance method, and whether you have a grace period. Use this as a planning tool and consult your credit card issuer for precise numbers.
Is this calculator free to use?
Yes, this calculator is completely free to use. No registration or personal data storage is required. All calculations are performed in your browser.
What is the best way to pay off credit card debt?
The best way is to pay more than the minimum , as much as you can afford each month. This calculator helps you see the impact of different payment amounts so you can choose a strategy that works for your budget.