Every month, your credit card company adds your current balance to any interest you owe for your monthly statement total. That month's minimum payment is a percentage of that total. There is usually a dollar amount for your minimum monthly payment, and it may be written like, "$35 or 2% of your balance plus fees, whichever is greater." Each credit card issuer calculates your minimum monthly payment differently. Consult your Discover statement and the terms of your account for information on how your Discover card minimum monthly payment is calculated.