Cancelling your PayPal subscription cancels all future scheduled payments of that subscription. A subscription can be cancelled up until the day before the next scheduled payment in order for you not to be charged.
Below are the steps to cancel your PayPal subscription:
Log in to your PayPal account at www.paypal.com.
Click Profile near the top of the page in the menu.
Click My Money.
Click Update in the My preapproved payments section.
Click Cancel or Cancel automatic billing and follow the instructions.