Hi Onora,

While customers don't have the option to add a tip when paying for their invoices, I recommend voting on the existing feedback/suggestion about this. That way, our development team will know that you want this feature as well.

Here are a few suggestions:

• https://intuit.me/3cjC8D7
• https://intuit.me/30wzkQd
• https://intuit.me/3clMWAx
   

If you have other concerns, please don't hesitate to go back to this thread. Take care and have a  good one!