Por vs para: the difference, with real frequency

Para looks forward, to a goal: the purpose of something, who it is for, where it is heading, when it is due. Por looks back, or through: the cause or reason, the route, the means, the exchange, the duration. Both are among the commonest words in Spanish — in film and television dialogue por is number 12 of all words and para number 20 — and por is said about 1.57 times as often, partly because it lives in so many fixed expressions. This post gives every use with an example, then ranks those expressions by how often they turn up.

Updated 7 October 2026 · 6 min read

When to use para

1. Purpose, "in order to". Estudio para aprender. Lo necesito para mañana. With a verb, para + infinitive; with a whole clause, para que + subjunctive: te lo explico para que lo entiendas, "I'm explaining it so that you understand".
2. Who something is for. Este regalo es para ti. Trabaja para una empresa alemana — "she works for a German company".
3. Destination. Salgo para Madrid mañana. Voy para casa — "I'm heading home".
4. A deadline. Tiene que estar listo para el lunes — "it has to be ready by Monday".
5. An opinion. Para mí, es demasiado caro — "to me, it's too expensive".
6. A comparison with what is expected. Para ser un niño, habla muy bien — "for a child, he speaks very well".
7. What something is used for. una taza para café — a coffee cup (a cup for coffee); una taza de café is a cup of coffee.

When to use por

1. Cause or reason: because of. Lo hice por ti — "I did it because of you, for your sake". Cancelaron el partido por la lluvia.
2. Through, along, around. Pasamos por el parque. Camina por la playa. ¿Hay un banco por aquí? — "is there a bank around here?"
3. Means. por teléfono, por correo, por avión.
4. Exchange and price. Lo compré por diez euros. Gracias por todo. Te cambio mi bocadillo por tu manzana.
5. In place of, on behalf of. Hoy trabajo por Juan — "today I'm working in Juan's place".
6. Duration. Estuvo en Londres por dos años. Common in Latin America; in Spain durante or no preposition at all is more usual: estuvo dos años en Londres.
7. Rate: per. cien kilómetros por hora, dos veces por semana, el diez por ciento.
8. The agent of a passive. Escrito por Cervantes — "written by Cervantes".
9. Vague time of day. por la mañana, por la tarde, por la noche.
10. Going to fetch. Voy por pan — "I'm going for bread". In Spain this is usually voy a por pan.

The pairs that change meaning

The quickest way to feel the difference is a sentence that takes either, and means something else each time:

¿Por qué? and ¿para qué? are the pair to learn first. "Why did you buy it?" asked with por qué wants the reason (porque estaba barato, "because it was cheap"); asked with para qué it wants the purpose (para regalarlo, "to give as a present").

How often each is used

The subtitle word lists count single words, so for expressions we used a second source: the 442,260 Spanish sentences in the Tatoeba collection, written by volunteers to show how the language is used. There por is 1.54 times as frequent as para — almost the same ratio as in the film dialogue, which is some reassurance that the two sources agree.

Here are the fixed expressions ranked by how many times each occurs in those sentences:

Two expressions carry por. Por qué and por favor alone account for 31.4% of every por in the collection, and all the por expressions in the table for 41.4%. A learner who knows "why" and "please" has already met much of the por they will read. Para is different: the expressions in the table cover only 8.9% of it, because para is mostly used productively — para plus a verb or a person, made up fresh each time — which is exactly what the rule above describes.

Two cautions. Tatoeba is a teaching collection, rich in questions and polite requests, so por qué and por favor are probably ranked higher here than in conversation. And counting a sequence of words cannot tell an expression from a coincidence: por la noche is counted whether it means "at night" or "for the night". The ranking is a guide to what to learn first, not a measurement of speech.

A short way to decide

• Is there a goal, a recipient, a destination or a deadline ahead? Para.
• Is there a cause behind it, a route through it, a means, a price, a rate or a period of time? Por.
• Is it one of the fixed expressions above? Learn it as a unit — por favor is not a rule to apply.

Por and para are the other half of the "two words for one" problem with ser and estar, and among the reasons Spanish grammar takes longer than its vocabulary. Both appear in the first few dozen of the most common Spanish words, and how many words you need to speak Spanish shows why words like them matter so much. The Spanish course teaches them in context from the first week.

Sources

• Real Academia Española and Asociación de Academias de la Lengua Española, Nueva gramática de la lengua española (2009), the chapter on prepositions.
• Wikipedia: Spanish prepositions.
• Lison, P. & Tiedemann, J. (2016). OpenSubtitles2016: Extracting Large Parallel Corpora from Movie and TV Subtitles. Proceedings of LREC 2016. aclanthology.org
• Dave, H. FrequencyWords: frequency lists from OpenSubtitles 2018, content licensed CC BY-SA 4.0. github.com.
• Tatoeba: Spanish sentences, licensed CC BY 2.0 FR, downloaded 2026-09-29. tatoeba.org. The counts are computed by por_para in scripts/frequency_extras.py; the expressions and their meanings were chosen by hand.