credit card interest calculation
The daily periodic rate method used by credit cards to calculate interest — daily rate applied to the average daily balance.
Example
“The credit card interest calculation showed $18 in daily interest on the $8,000 balance at 24% APR.”
Memory Tip
DAILY RATE — divide APR by 365. That rate applies to your balance every single day.
Why It Matters
Understanding how credit card interest is calculated helps you predict how much you will actually owe and makes you aware of how quickly debt can grow. This knowledge empowers you to make better decisions about whether to carry a balance and how to minimize interest charges over time.
Common Misconception
Many people believe interest is calculated once per month on their statement balance, but credit cards actually calculate interest daily using the average daily balance method. This means even if you pay part of your bill, interest continues to accrue on the remaining balance throughout the month.
In Practice
If you have a credit card with a 20 percent annual percentage rate and an average daily balance of $1,000 over a 30-day month, your daily periodic rate is approximately 0.055 percent. This rate applied daily to your average balance would result in roughly $16.50 in interest charges for that month, which gets added to your next statement.
Etymology
Modern consumer credit education — understanding exactly how credit card interest accrues.
Common Misspellings
Check your credit score free — no impact
Related Terms
More in credit
Other credit terms you should know
See Also
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