Revolving Charge Credit Card Calculator
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Reviewed by Calculator Editorial Team
Credit cards with revolving charges allow you to carry a balance from month to month, accruing interest on the outstanding amount. This calculator helps you estimate how much interest you'll pay based on your spending pattern and credit card terms.
What is a Revolving Charge?
A revolving charge is a type of credit card transaction where the balance carries over to the next billing cycle, accumulating interest charges. Unlike fixed payments, revolving charges grow over time if not paid in full each month.
Key Point: Revolving charges are common with credit cards that offer rewards programs or cash back. However, they can lead to significant interest costs if not managed properly.
How Revolving Charges Work
When you make a purchase with a credit card that has revolving charges, the amount is added to your outstanding balance. If you don't pay the full amount by the due date, the remaining balance will earn interest until it's paid off.
Factors Affecting Revolving Charges
- Interest rate (APR)
- Length of time the balance remains unpaid
- Minimum payment requirements
- Grace period (time between purchase and when interest starts accruing)
How to Use This Calculator
This calculator estimates the total interest you'll pay on a revolving charge over a specified period. Follow these steps:
- Enter your starting balance (the amount you owe at the beginning of the period)
- Input your monthly payment amount
- Specify the annual percentage rate (APR)
- Enter the number of months you want to calculate
- Click "Calculate" to see your results
Formula Used
The calculator uses the following formula to estimate revolving charges:
Total Interest = P × (1 + r/n)^(nt) - P
Where:
- P = Principal amount (starting balance)
- r = Annual interest rate (APR)
- n = Number of times interest is compounded per year
- t = Time in years
For monthly compounding, n = 12.
Worked Example
Let's calculate the interest on a $1,000 balance with a 15% APR over 12 months, making minimum payments of $100 each month.
| Month | Starting Balance | Interest | Payment | Ending Balance |
|---|---|---|---|---|
| 1 | $1,000.00 | $12.50 | $100.00 | $912.50 |
| 2 | $912.50 | $11.81 | $100.00 | $824.31 |
| 3 | $824.31 | $10.95 | $100.00 | $735.26 |
| 4 | $735.26 | $10.04 | $100.00 | $645.30 |
| 5 | $645.30 | $9.12 | $100.00 | $555.42 |
| 6 | $555.42 | $8.21 | $100.00 | $473.63 |
| 7 | $473.63 | $7.29 | $100.00 | $391.92 |
| 8 | $391.92 | $6.38 | $100.00 | $310.30 |
| 9 | $310.30 | $5.48 | $100.00 | $225.78 |
| 10 | $225.78 | $4.57 | $100.00 | $141.35 |
| 11 | $141.35 | $3.65 | $100.00 | $58.00 |
| 12 | $58.00 | $2.75 | $58.00 | $0.00 |
In this example, the total interest paid over 12 months is approximately $125.75. The calculator provides a more precise estimate based on your specific inputs.
Frequently Asked Questions
How accurate is this calculator?
This calculator provides an estimate based on the inputs you provide. For precise financial planning, consult with your credit card issuer or a financial advisor.
What is the difference between APR and APY?
APR (Annual Percentage Rate) is the simple interest rate charged on your balance, while APY (Annual Percentage Yield) includes compound interest and shows the effective annual rate of return.
How can I reduce revolving charges?
To reduce revolving charges, pay your balance in full each month, consider balance transfer cards with lower interest rates, or negotiate with your credit card company for a lower APR.
What happens if I miss a payment?
Missing a payment can result in late fees, higher interest rates, and potential damage to your credit score. It's important to make payments on time to avoid these consequences.