How to Say "duty" in Spanish
The most common Spanish word for “duty” is “obligación” — use 'obligación' when referring to a moral or legal responsibility that one must fulfill, like paying taxes or following laws..
obligación
Examples
Pagar los impuestos es una obligación legal para todos.
Paying taxes is a legal obligation for everyone.
función
Examples
La función principal de este botón es encender la máquina.
The main function of this button is to turn on the machine.
servicio
/ser-BEE-syo//seɾˈbi.sjo/

Examples
El servicio al cliente en esa tienda es fantástico.
The customer service in that store is fantastic.
Los servicios de emergencia llegaron en cinco minutos.
The emergency services arrived in five minutes.
El hotel ofrece servicio de habitaciones las 24 horas.
The hotel offers 24-hour room service.
guardia
/gwar-dya//ˈɡwar.ðja/

Examples
El médico está de guardia esta noche en urgencias.
The doctor is on duty tonight in the emergency room.
Mi próxima guardia es el sábado, así que no puedo ir a la fiesta.
My next shift is Saturday, so I can't go to the party.
Hicieron guardia en la frontera durante seis horas.
They kept watch at the border for six hours.
Using 'De Guardia'
To express that someone is currently working their shift or is available for emergencies, use the structure 'estar de guardia' (to be on duty).
responsabilidad
reh-spon-sah-bee-lee-DAHD/res.pon.sa.βi.liˈðað/

Examples
La responsabilidad de cuidar a mi hermana es muy grande.
The responsibility of taking care of my sister is very great.
Asume la responsabilidad por tus errores.
Take responsibility for your mistakes.
El director evitó toda responsabilidad sobre el proyecto fallido.
The director avoided all accountability for the failed project.
Feminine Noun Rule
Remember that 'responsabilidad' is always a female word, so you must use 'la' before it: 'la responsabilidad'.
Prepositions with Responsibility
When talking about the thing you are responsible for, use the preposition 'de' (of): 'Tengo la responsabilidad de limpiar' (I have the responsibility to clean).
False Cognate Confusion
Mistake: “Decir 'Tengo responsibilidad' (Missing the 'a').”
Correction: The correct spelling is 'responsabilidad' (note the 'a' after the 's'), which is a bit different from the English word.
derecho
/deh-REH-choh//deˈɾe.t͡ʃo/

Examples
Hay que pagar los derechos de aduana para importar el coche.
You have to pay the customs duties to import the car.
La factura incluye los derechos de matrícula de la universidad.
The bill includes the university's registration fees.
tasa
/TAH-sah//ˈtasa/

Examples
Debes pagar una tasa para renovar el pasaporte.
You must pay a fee to renew your passport.
Las tasas aeroportuarias están incluidas en el billete.
The airport taxes are included in the ticket.
Tasa vs. Impuesto
A 'tasa' is usually a fee you pay in exchange for a specific service (like getting a license), while an 'impuesto' is a general tax that goes to the government for everything.
Obligación vs. Responsabilidad
Related Translations
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