Por vs para
A useful picture for most everyday cases is that por looks at the route, cause, means or exchange, while para looks at the destination, purpose, recipient or deadline. Paso por el parque para llegar a casa: through the park (the route) to get home (the goal). Both can translate as “for”, so translating word for word does not settle it. The picture is a starting point, not the whole rule: fetching (voy por pan), duration (por dos años) and fixed phrases (para siempre) have to be learned as they are.
A picture that covers most of it
Do not start with “which English word goes here?”. Start with what the preposition is doing. Por looks back at how or why something happens, or at the route it takes. Para looks ahead: where something is going, what it is for, or who receives it.
| What it marks | Example | Natural English |
|---|---|---|
| a route | Paso por el parque. | I walk through the park. |
| a cause | Estoy cansado por el viaje. | I'm tired because of the trip. |
| a means | Te llamo por teléfono. | I'll call you by phone. |
| an exchange | Pagué diez euros por el libro. | I paid ten euros for the book. |
| a reason for thanks | Gracias por la cena. | Thanks for dinner. |
| somebody's place or behalf | Lo hice por ti. | I did it for you. |
| What it marks | Example | Natural English |
|---|---|---|
| a destination | Salgo para Madrid. | I'm leaving for Madrid. |
| a purpose | Estudio para aprender. | I study to learn. |
| a recipient | Este regalo es para ti. | This present is for you. |
| a deadline | Lo termino para el lunes. | I'll finish it by Monday. |
| an opinion or point of view | Para mí, está bien. | For me, it's fine. |
One sentence, both prepositions
Paso por el parque para llegar a casa. The park is the route, so it takes por. Getting home is the goal, so it takes para. You could reverse the journey and the choice would still follow the job each phrase is doing: Salgo de casa para el trabajo. Paso por el centro.
A deadline works like a destination in time. Para el lunes points at Monday as the endpoint. A length of time is different: Viví allí por dos años describes how long something lasted, not when it is due.
The contrast that matters with people
Para often marks the person who receives something: Este regalo es para ti. Por can mark benefit, substitution or a reason: Lo hice por ti can mean that you did it on somebody's behalf or because of them, depending on the sentence. English uses “for you” for all of these, which is why the English sentence alone does not give you the answer.
Where the picture stops helping
- An ordinary goal takes para + infinitive. Vengo para ayudar — I come to help. Por + infinitive has its own uses, including cause: Por llegar tarde, perdí el tren — because I arrived late, I missed the train. Some por + infinitive constructions can also express purpose, so treat “goal = para” as the default rather than a law.
- Fetching often takes por. Voy por pan — I'm going to get bread. The shop may be where you are headed, but the bread is what you are going to collect.
- Fixed phrases stay fixed. Por la mañana (in the morning), por la noche (at night), por supuesto (of course) and para siempre (forever) are learned as whole phrases, not assembled from the picture.
- Duration and deadline are different. Por dos años is for two years; para el lunes is by Monday. One measures the span, the other names the endpoint.
A five-line check
Cover the answers and choose before you read them. The point is to name the job, not to translate the preposition.
- Camino ___ el parque ___ llegar a casa. — por, para (route, then goal).
- Este regalo es ___ ti. — para (recipient).
- Gracias ___ la cena. — por (reason for thanks).
- Lo termino ___ el lunes. — para (deadline).
- Voy ___ pan. — por (fetching).
How the choice becomes automatic
The RAE lists many uses for each preposition, and memorising the whole list is not a practical way to speak. Learn the picture, the common contrasts and the fixed phrases, then meet them in sentences until the choice stops feeling like a translation exercise. The ser vs estar guide is another case where one useful distinction gets you most of the way and the exceptions deserve their own attention.
Questions
Do por and para both mean “for”?
Often, yes, but each has several other translations too. Por can be through, by, because of or in exchange for; para can be for, to, towards or by (a deadline). Choose by the job the preposition is doing, not by the English word you expect.
Is para always the destination?
No. Destination is part of the picture, alongside purpose, recipient, deadline and point of view. Para el lunes is a deadline; para ti is for you as the recipient.
Can por be used before an infinitive?
Yes. It can express cause (por llegar tarde — because of arriving late) and some constructions can express purpose. For an ordinary goal, para + infinitive is the default: vengo para ayudar.
Is it por or para for “thank you for”?
Por: gracias por la cena, gracias por ayudarme. The thing you are thanking somebody for is the reason, and por marks it.
Does the route-versus-destination rule cover every case?
No, and it is better treated as a picture than a rule. It covers many everyday uses, but fetching (voy por pan), duration (por dos años) and fixed phrases (para siempre) need to be learned separately.
Sources
Keep going
- ser vs estarThe difference between ser and estar in Spanish, with the rule that covers almost every case, the exceptions everyone trips on, and the two verbs that are almost always ser. With examples.
- Spanish verb conjugationsSpanish verb conjugations for the most common verbs, in every tense: present, preterite, imperfect, future, conditional, subjunctive and imperfect subjunctive, with irregular forms and usage notes. Free, no sign-up.
- Spanish false friendsThe Spanish words that look like English and aren't: how to say actually, sensible, eventually, to assist and more, with the real meaning and what to say instead. With sources.