Calculator

Credit Card Interest Calculator

Add up the interest a credit-card balance charges until a fixed payment clears it.

Your inputs

USD
%
USD

Changes formatting only, not the value.

Total interest

$2,338.94

The balance clears in 4 years 1 month.

Months
4 years 1 month

Formula

Each month, interest is the APR divided by 12, and the rest of the payment reduces the balance:

Total interest = sum of each month's interest

The payoff page leads with the time. This page leads with the interest dollars.

Assumptions

  • The APR and the payment stay fixed.
  • No new charges are added.

Worked example

A $5,000 balance at 19.9% paid at $150 a month costs $2,338.94 in interest.

Input definitions

Monthly payment
A fixed amount that must be greater than one month of interest.

Limitations

This is an estimate, not a loan offer, tax filing, or investment advice. The currency control changes the symbol only.

Questions

Why was my payment rejected?

If the payment is less than or equal to the month's interest, the balance never falls.

Are fees included?

No. Only interest on the balance you typed.

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