TOOTAl2 asked:
I paid my credit card off and the next month i get a bill for 4.00 Why does this happen? If i pay the full amount it should be paid off.
I paid my credit card off and the next month i get a bill for 4.00 Why does this happen? If i pay the full amount it should be paid off.

If your billing cycle ends on the 30th of the month, maybe you had a charge that had not posted yet.
The best thing to do would be to call your CC company and ask them
You missed the grace period. It is accrued interest between the date the last statement dropped, and the day they processed your payment…