Cancel a Kindle Unlimited Subscription
Follow these steps to cancel your Kindle Unlimited membership.
Important: If you cancel a Kindle Unlimited membership that was pre-paid (a gift or bundle), you will not receive a partial refund for unused months.
Go to Manage your Kindle Unlimited Membership and sign into your Amazon account.
Under Manage Membership, select Cancel Kindle Unlimited Membership.
Select End Membership on [DATE] making sure to fill in the desired end date. Your membership remains active until the next billing date. After the billing date passes, you lose access to content that you have checked out.