-ar verb irregular · stem-changing o>ue A2 · Elementary

Conjugate costar in Spanish

to cost

costar is an irregular -ar verb ranked #118 among the most common Spanish verbs. For example: "Yo cuesto todos los días." (I cost every day.). Use the tables below for full conjugation across all 7 tenses.

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⚡ Irregular verb — costar (stem-changing o>ue) does not follow standard -ar patterns. Pay close attention to the stems in each tense.

Describes current actions, habits, and general truths. The most frequently used tense — master it first.

Pronoun Conjugation
yo cuesto *
cuestas *
él/ella/Ud. cuesta *
nosotros costamos
vosotros costáis
ellos/ellas/Uds. cuestan *
Example

Yo cuesto todos los días.

I cost every day.

Describes completed past actions with a clear start and end. Key signals: ayer, el lunes pasado, de repente.

Pronoun Conjugation
yo costé
costaste
él/ella/Ud. costó
nosotros costamos
vosotros costasteis
ellos/ellas/Uds. costaron
Example

Nosotros costamos juntos.

We cost together.

Describes habitual past actions, background context, and ongoing states. Key signals: siempre, normalmente, cuando era niño.

Pronoun Conjugation
yo costaba
costabas
él/ella/Ud. costaba
nosotros costábamos
vosotros costabais
ellos/ellas/Uds. costaban
Example

Antes yo costaba con frecuencia.

Before, I used to cost often.

Describes future events and predictions. In everyday speech, ir a + infinitive is often preferred for planned events.

Pronoun Conjugation
yo costaré
costarás
él/ella/Ud. costará
nosotros costaremos
vosotros costaréis
ellos/ellas/Uds. costarán
Example

Mañana yo costaré.

Tomorrow I will cost.

Expresses what would happen under certain conditions — equivalent to "would" in English. Also used for polite requests.

Pronoun Conjugation
yo costaría
costarías
él/ella/Ud. costaría
nosotros costaríamos
vosotros costaríais
ellos/ellas/Uds. costarían
Example

Si pudiera, yo costaría.

If I could, I would cost.

Used in clauses expressing wishes, doubt, emotion, or uncertainty — typically after que. Triggers: querer, esperar, dudar, ojalá.

Pronoun Conjugation
yo cueste *
cuestes *
él/ella/Ud. cueste *
nosotros costemos
vosotros costéis
ellos/ellas/Uds. cuesten *
Example

Quiero que tú cuestes más.

I want you to cost more.

Used to give commands and direct requests. Affirmative and negative forms differ significantly in Spanish.

Pronoun Conjugation
yo -
costa
él/ella/Ud. coste
nosotros costemos
vosotros costad
ellos/ellas/Uds. costen
Example

¡Costa!

Cost!

Test yourself

Type the correct conjugation for each prompt.

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Example sentences

Common phrases with costar

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