payable in arrears

that which is owed to another party as a debt but should be paid after obtaining the service or goods (Dic)

In other languages:

• pagabbli b'lura [MT] - l-ammont li għandhu jitħallas lil ħaddieħor bħala debitu imma li jitħallas wara li tirċievi s-servizz jew l-oġġetti
• pagabile in arretrato [IT]