Both ser and estar translate to "to be" in English, but they are used in completely different situations. Getting this right makes a big difference in how natural your Spanish sounds.
The simplest way to think about it is this: ser is for permanent or inherent qualities, and estar is for temporary states or conditions. This is not a perfect rule, but it covers most situations.
Ser is used for things that define what something or someone fundamentally is. Estar is used for things that describe how something or someone is at a given moment.
Identity and nationality
Soy americano. (I am American.)
Profession
Es médico. (He is a doctor.)
Permanent characteristics
La casa es grande. (The house is big.)
Relationships
Es mi hermano. (He is my brother.)
Time and dates
Son las tres. (It is three o'clock.)
Origin
Somos de Nueva York. (We are from New York.)
Material something is made of
La mesa es de madera. (The table is made of wood.)
Location
Estoy en casa. (I am at home.)
Temporary states and feelings
Estoy cansado. (I am tired.)
Conditions that can change
El agua está fría. (The water is cold.)
Ongoing actions (with gerund)
Estoy comiendo. (I am eating.)
Results of an action
La puerta está abierta. (The door is open.)
Some adjectives mean different things depending on whether you use ser or estar. This is where it gets interesting.
| Adjective | With ser | With estar |
|---|---|---|
| aburrido | boring (personality) | bored (right now) |
| malo | bad (person/thing) | sick (feeling ill) |
| listo | clever (smart person) | ready (prepared) |
| rico | wealthy (has money) | delicious (food) |
| seguro | safe (not dangerous) | sure (certain) |
Both ser and estar are highly irregular. Here are the present tense forms for both:
Ser (permanent)
Estar (temporary)
Spanish Conjugation Training includes both ser and estar with full conjugation grids across all tenses. Quiz yourself until the forms become automatic.
Start practicing for free