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Credit Card Interest Calculator
Monthly interest charged when you carry a credit card balance.
Enter values to see your result
Frequently asked questions
Why is credit card interest so high?
Unsecured, high-risk lending. Default rates are meaningful, and banks price in the risk. Pay the full balance every month — revolving is among the most expensive borrowing.
Does paying minimum avoid interest?
No — minimum payment avoids late fees but you're still charged interest on the remaining balance. Only full payment stops the interest clock.
What's the grace period?
Typically 20–50 days from statement date. Grace applies only if you paid the previous statement in full. Carry any balance and grace disappears.
Can I negotiate APR?
Sometimes yes — call customer service and ask for a rate reduction if you've been a good customer. Success rate: 30–50% if you have decent credit.