If Your Credit Card Calculate Interest Based on 13.90
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Reviewed by Calculator Editorial Team
When your credit card charges interest at 13.90% APR, understanding how this interest is calculated can help you manage your debt more effectively. This guide explains the calculation process, provides a working example, and includes a calculator to compute your interest charges.
How to Calculate Credit Card Interest
Credit card interest is typically calculated using the average daily balance method. This means your interest is based on the average amount of debt you carry each day over a billing cycle. Here's how the calculation works:
- Determine your daily balance: Track your account balance each day during the billing cycle.
- Calculate the average daily balance: Sum all daily balances and divide by the number of days in the billing cycle.
- Apply the interest rate: Multiply the average daily balance by your card's APR (13.90% in this case) and the number of days in the billing cycle.
- Divide by the number of days in the year: This converts the daily interest into an annual rate.
Note
Most credit cards use the average daily balance method, but some may use the previous balance method. Always check your card's terms to understand how interest is calculated.
The Interest Calculation Formula
The formula for calculating credit card interest based on the average daily balance is:
Formula
Interest = (Average Daily Balance × APR × Days in Billing Cycle) / Days in Year
Where:
- Average Daily Balance is the sum of all daily balances divided by the number of days in the billing cycle.
- APR is the annual percentage rate (13.90% in this case).
- Days in Billing Cycle is the number of days between billing statements.
- Days in Year is typically 365 or 366 for leap years.
Worked Example
Let's calculate the interest for a billing cycle where:
- Average daily balance: $1,500
- APR: 13.90%
- Days in billing cycle: 30
- Days in year: 365
Calculation
Interest = ($1,500 × 0.1390 × 30) / 365
Interest = ($6,255) / 365
Interest = $17.13
In this example, your credit card would charge $17.13 in interest for the billing cycle.
Frequently Asked Questions
How is credit card interest calculated?
Credit card interest is typically calculated using the average daily balance method, where your interest is based on the average amount of debt you carry each day over a billing cycle.
What does APR mean?
APR stands for Annual Percentage Rate, which represents the annual cost of borrowing for your credit card. It includes both the interest rate and any additional fees.
Can I avoid paying interest on my credit card?
Yes, you can avoid interest by paying your credit card balance in full each month. Some cards also offer interest-free periods if you pay the minimum amount due by the due date.
How does the billing cycle affect my interest?
The billing cycle determines how often your statement is issued and when your interest is calculated. Shorter billing cycles may result in lower interest charges if you pay your balance in full.