It's up to you! You can either pay for payment processing fees yourself or you can pass on the fees to your client.
- 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.
- On every invoice and subscription you create, you can overwrite this default by expanding Advanced Settings and toggling Absorb transaction fees on or off.