How do I integrate PayPal Payments Standard/Subscriptions with WooCommerce Subscriptions?
To enable your WooCommerce cart to support PayPal Payments Standard with Subscriptions, you must purchase the extension from WooCommerce Subscriptions.
To learn how to create a recurring product, see WooCommerce's Subscriptions Store Manager Guide.
Once you've created your recurring products, activate PayPal Payments Standard using the steps described on WooCommerce's PayPal Standard page.
Note: Additional modules are available to add subscription support to your WooCommerce shopping cart. PayPal recommends that you do research before purchasing any modules to ensure these modules will support the feature sets you want. To ensure a safe recovery path, in case you need one, always back up your site before installing any modules.
WooCommerce Subscriptions Support