Through Redbox or iTunes? I know Redbox charges you $24 for DVDs and $34.50 for Blu Rays if you don't return them before 20 days. They don't give any more details than that though.
From Redbox:
"Those fees are $24 + tax for DVDs ($25.40 in Maryland), $34.50 + tax for Blu-ray Discs ($35.51 in Maryland) and $60 + tax for video games ($61.48 in Maryland). At boxes where DVDs rent for $1, the maximum rental period for DVDs is 25 days and the maximum rental charge is $25."
iTunes.