It's up to you! You can either pay for payment processing fees yourself or you can pass on the fees to your client.  

  1. If you want to set up a global default setting, you can do so on the Settings / Billing page. Look for the Absorb transaction fees option and either turn it on or off.
  2. On every invoice and subscription you create, you can overwrite this default by expanding Advanced Settings and toggling Absorb transaction fees on or off.