IPA: /ʌnˈbɪld/
KK: /ʌnˈbɪld/
Describing something that has not been charged or listed on a bill, such as services or fees that are yet to be invoiced.
The company had several unbilled expenses at the end of the month.
Unbilled → It is formed from "un-" (meaning not) and "billed" (from the verb "bill", meaning to send a statement of charges). The word "unbilled" means not having been charged or invoiced for services or goods.
Think of 'not' ('un-') having received a 'statement of charges' ('billed') — that's what unbilled means.