calculation

I used a credit card for 2100.00 at 19% interest and have paid 24 payments on time of 100.00. I need to know what the balance is on the 2100.00 being paid as the card has been used for other purposes

Without knowing when your payments were made or your average daily balance, we have really no way of telling. Talk to the credit card company.

Credit cards use a very complex formula for calculating the interest, and we really could not give you anything accurate.

Below is a "rough" ammortization schedule I just made in Excel. The interest in this table is calculated on the basis of a 360-day year and assumes that exactly 30 days elapses between payments.

I should also add that my table is based on "simple" interest --ie interest is not compounded.

Credit cards do compound the interest onto your balance. In other words, they charge you interest on your interest.

So are those numbers correct $2100 at 19% with $100 for 24 months? If you stick those in a credit card cal 2100 at 19% with payments of $100 will take 25.6 months to pay off... so I guess you still around $150 or $160 like the chart lists above.