Interest Calculated on Credit Card
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Reviewed by Calculator Editorial Team
Credit card interest is calculated based on the balance you carry each billing cycle, your card's Annual Percentage Rate (APR), and how often interest is compounded. Understanding how interest is calculated helps you manage your credit card debt more effectively and potentially save money.
How Interest is Calculated on Credit Cards
The calculation of interest on credit cards follows a specific formula that varies slightly depending on the card issuer and the interest calculation method used. The most common methods are daily balance and average daily balance.
Interest Calculation Formula
Interest = (Daily Balance × Daily Interest Rate) + (Previous Interest)
Where Daily Interest Rate = (APR ÷ 365) ÷ 100
For example, if you have a balance of $1,000 and your card has a 20% APR, the daily interest rate would be 0.0548% (20% ÷ 365 ÷ 100). If you carry this balance for 30 days, the interest would be approximately $16.43.
Key Factors
- APR (Annual Percentage Rate): The annual interest rate charged by the card issuer
- Daily Balance: The average balance carried each day of the billing cycle
- Interest Compounding: How often interest is added to the balance
Types of Credit Card Interest
There are two main types of interest charged on credit cards: purchase interest and cash advance interest.
Purchase Interest
Purchase interest is charged on purchases made with your credit card. It's typically calculated using the average daily balance method and is based on the card's APR.
Cash Advance Interest
Cash advance interest is charged when you withdraw cash from your credit card. It's usually calculated using the daily balance method and has a higher APR than purchase interest.
Interest Rate Differences
Purchase interest rates are typically lower than cash advance interest rates. For example, a card might have a 15% APR on purchases and a 25% APR on cash advances.
Interest Calculation Methods
Credit card issuers use different methods to calculate interest. The two most common methods are:
Daily Balance Method
With the daily balance method, interest is calculated on the average daily balance for each billing cycle. This method tends to result in higher interest charges because it accounts for every day's balance.
Average Daily Balance Method
The average daily balance method calculates interest based on the average of the daily balances during the billing cycle. This method typically results in lower interest charges than the daily balance method.
| Method | Calculation | Interest Charges |
|---|---|---|
| Daily Balance | Interest = (Daily Balance × Daily Interest Rate) + (Previous Interest) | Higher |
| Average Daily Balance | Interest = (Average Daily Balance × Daily Interest Rate) + (Previous Interest) | Lower |
How Payments Affect Interest
Making payments on your credit card can significantly impact the amount of interest you pay. Here are some key points to consider:
Making Minimum Payments
If you only make the minimum payment each month, you'll pay more in interest over time. The interest will compound on the remaining balance, increasing your total debt.
Making Full Payments
Paying off your balance in full each month will prevent interest from accumulating. This is the most effective way to minimize interest charges.
Making Extra Payments
Making extra payments can help reduce your interest charges by lowering the principal balance. However, the interest already accrued will still be due.
Interest Compounding
Interest compounds daily on credit card balances. This means that the interest you pay each day is added to your balance, and interest is calculated on this new balance the next day.
Credit Card Interest Calculator
Use our calculator to estimate how much interest you'll pay on your credit card balance. Simply enter your balance, APR, and the number of days, then click "Calculate" to see your estimated interest charges.
Frequently Asked Questions
- How is credit card interest calculated?
- Credit card interest is calculated based on your average daily balance, your card's APR, and how often interest is compounded. The most common methods are daily balance and average daily balance.
- What is the difference between purchase interest and cash advance interest?
- Purchase interest is charged on purchases made with your credit card, while cash advance interest is charged when you withdraw cash from your card. Cash advance interest typically has a higher APR than purchase interest.
- How do payments affect credit card interest?
- Making payments on your credit card can significantly impact the amount of interest you pay. Paying off your balance in full each month will prevent interest from accumulating, while making minimum payments will result in higher interest charges.
- What is the daily balance method for calculating interest?
- The daily balance method calculates interest on the average daily balance for each billing cycle. This method tends to result in higher interest charges because it accounts for every day's balance.
- What is the average daily balance method for calculating interest?
- The average daily balance method calculates interest based on the average of the daily balances during the billing cycle. This method typically results in lower interest charges than the daily balance method.