'financiero' originates from Spanish, ultimately derived from Old French 'finance' (meaning a payment or settlement) and from Medieval Latin elements related to Latin 'finis' ('end' or 'settlement').

'financiero' developed in Spanish from Middle French 'financier' / 'finance' (terms for settling debts and money matters); over time Spanish adopted the form 'finanza'/'financiero' to denote finance-related concepts and persons.

Initially associated with settling or ending (debts/payments), the term shifted to refer to money management and fiscal matters; it now means 'relating to finance' or 'a person who manages finances'.