The standard PayPal practice is that the transaction cost is payed by the freelancer. See the following link for more information regarding the fees. Keep in mind that you may need to localise it to your country.
https://www.paypal.com/smarthelp/article/what-are-the-fees-for-paypal-accounts-faq690
https://www.paypal.com/smarthelp/article/what-are-the-fees-for-paypal-accounts-faq690
Published on: 14 / 05 / 2020