incidental expenses
idiomPart ofexpense
incidental expenses — idiom
1. small additional costs that come up during a trip or project, such as tips, laun
1.idiom
Definition
small additional costs that come up during a trip or project, such as tips, laundry, or local transport
Example
The per-diem allowance covers meals and incidental expenses like taxi fares.
Keep the receipts for any incidental expenses you incur at the conference.