@Grimayoj  Should be as simple as using an Addition item coded to the relevant expense or inventory account.

In this way, you will be recognizing the expense or inventory when it is added to their paycheck.

You will want to make sure that this Addition item is not coded such that it increases their gross pay. It should have its tax tracking type coded to None or whatever the QBO equivalent is.

If it were an inventory item, then drawing it over to the invoice later as usual will turn it into COGS.