Amazon Prime runs about $14.99/mo. Here's the direct link and exact steps to cancel it.
Step by step
Go to Your Account
Manage Prime Membership
End Membership
Cancelled it — or keeping it a little longer?
Either way, ForesIQ warns you a few days before Amazon Prime — or anything else — renews, so you decide on purpose instead of finding out after you're charged. No bank login, no card required.
