Depends on how much you have in the bank. I collect 4 credits of intrest every day. So it really depends on how much you have in the bank.
you have to press the button when it isnt shaded over, i get 16 points of interest, i have a 6% interest rate
i have 3 credit waitin for me but.. the intrest boutton dont work here or at home i thought it was my comp but i tried it here and it aint its the website i think