How Amazon Prime Card Calculates Interest

The Amazon Prime Card is a rewards credit card that offers cash back and other benefits to Amazon Prime members. Understanding how interest is calculated on this card is important for managing your finances effectively.

How Amazon Prime Card Calculates Interest

The Amazon Prime Card uses a variable Annual Percentage Rate (APR) that changes based on your creditworthiness and the Prime Card's terms. The interest is calculated daily on the average daily balance, and interest charges are applied monthly.

Interest Calculation Formula

Daily Interest = (Daily Balance × Daily Interest Rate) / 365

Monthly Interest = Sum of Daily Interest × 30

The card typically has a 0% introductory APR period for purchases, but interest accrues on balances that carry over beyond the promotional period. The exact APR varies based on your credit profile and can be found in your account statement.

APR vs. APY: What's the Difference?

APR (Annual Percentage Rate) is the simple annual interest rate on a loan or credit card. APY (Annual Percentage Yield) is the effective annual rate that takes into account compounding interest.

For example, if the APR is 18%, the APY might be around 18.43% when compounded monthly.

Amazon Prime Card typically reports both APR and APY on your statement, allowing you to compare different cards more accurately.

Interest Calculation Methods

The Amazon Prime Card uses the average daily balance method to calculate interest. This means:

The daily balance is calculated by averaging the daily balance for each billing cycle.
Interest is calculated daily on this average balance.
The monthly interest charge is the sum of all daily interest for that month.

This method ensures that you're only charged interest on the average amount you actually owe during the billing period.

Worked Example

Let's say you have a $1,500 balance on your Amazon Prime Card with an APR of 18%. Here's how the interest would be calculated:

Example Calculation

Daily Interest = ($1,500 × 0.18) / 365 ≈ $0.74

Monthly Interest = $0.74 × 30 ≈ $22.20

After one month, you would owe approximately $1,522.20 in interest charges.

Frequently Asked Questions

How often does Amazon Prime Card charge interest?: Amazon Prime Card charges interest monthly on the average daily balance, which is then added to your statement.
Can I avoid interest on the Amazon Prime Card?: Yes, you can avoid interest by paying your balance in full each month or taking advantage of any 0% introductory APR periods.
Is the APR on Amazon Prime Card fixed or variable?: The APR on Amazon Prime Card is typically variable and can change based on your creditworthiness and market conditions.
How does the interest calculation differ from other credit cards?: The Amazon Prime Card uses the average daily balance method, which is common among credit cards, but the specific terms and APR may vary.
What happens if I miss a payment on the Amazon Prime Card?: Missing a payment can lead to higher interest charges and potential penalties, so it's important to make payments on time.