How to Say "self-interested" in Spanish
The Spanish word for “self-interested” is “interesado” — B1 level.
English → SpanishB1
adjectiveB1
motivated by personal gain

Examples
Ella no te ayuda por amistad, es solo una persona muy interesada.
She doesn't help you out of friendship, she's just a very self-interested person.
El abogado solo aceptó el caso porque era muy interesado en el dinero.
The lawyer only took the case because he was very motivated by the money (greedy).
The Tone Shift
Unlike the first meaning ('curious'), this meaning describes a negative character trait. When used alone to describe a person, 'interesado' almost always implies they are only looking out for themselves.
Related Translations
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