[Moderator moved from Dreamweaver to Account, Payment & Plans.]
From the time you join Creative Cloud, you have 14 days to cancel without a fee. Thereafter, there is a 50% early cancellation fee for Annual subscription members. So if 6 months of service remain on your contract, the cancellation fee is 3 months of payments.
There is a costlier month-to-month option for people who don't want to commit to 1 year of service at a guaranteed price. That rate is subject to increases but you may cancel anytime without penalty.