Hi there, @rogeraf.

I understand that you want a report where you can track non-billable bills.

I recommend pulling up the Transaction List with splits then customize it for you to see the non-billable bills. 

Here's how:

1. Go to the Report tab.
2. In the Find report by name bar, search the Transaction List with splits.
3. Click on Customize.
4. Select the Row/Columns and put a checkmark beside Billable.
5. Click on Filter, then choose Bill as a Transaction Type.
6. Select Run report.

This report will both show the billable and non-billable transactions. You'll want to export it so you can take out manually the billable transactions.

I'm attaching these articles for future reference:

• Enter, edit, or delete expenses in QuickBooks Online.
• How to remove a billable expense charge.

If you still having some confusion, don't hesitate to comment below. I'd be glad to help you. Thank you.