Using AJdG Paypal Surcharge
You'll need a copy of PayPal Surcharge to proceed with this guide. You can get the plugin here.
AJdG Paypal Surcharge is easily configured and only has 4 settings.
You activate the plugin like any other from the WordPress Plugins dashboard page. Once activated, the plugin adds new dashboard appears in the WooCommerce Payments dashboard. You'll see it if you navigate to WooCommerce > Settings > Payments, then click on the sub-page Paypal Surcharge.
You can also reach these settings from the Plugins page by clicking on 'Settings' in the action links.
The 'Method' setting:
This setting determines what kind of surcharge you'll add. A percentage amount or a fixed amount.
If you know there is always an extra cost of, say, 4 Euros you can simply add 4 Euros.
If your handling costs change with the order total a percent surcharge makes more sense.
The 'Amount' setting:
The amount is how much you'll charge.
If you've chosen the Fixed amount fee, entering 3 will charge €3 extra (or whatever your shop currency is).
If you've chosen an added percent, entering 3 will add 3% to the total order amount.
The 'Label' setting:
The label is what you'll call the surcharge on checkout and the invoice. Similar to how Tax and shipping fees show up at checkout, the Surcharge will too on a separate line.
If you don't like the word Surcharge, or your country has a different term for it you can change it here.
Sometimes using a term like "handling fee" makes more sense for example.
Subscriptions:
If you want the surcharged applied to subscriptions, check the box for it. This includes the charge on the repeated transactions as well.