If you’re learning Spanish or Portuguese, one of the first challenges you’ll encounter is understanding the difference between “ser” and “estar”—both of which translate to “to be” in English. While English relies on a single verb for permanent and temporary states, Spanish and Portuguese distinguish between them, leading to common confusion for learners.
In this guide, we’ll break down when to use ser and estar, their key differences, and practical tips to master them like a native speaker.
The Core Difference: Permanent vs. Temporary

At its most basic level:
- Ser = Used for permanent, essential, or inherent characteristics.
- Estar = Used for temporary states, conditions, or locations.
This distinction applies to both Spanish and Portuguese, with only slight variations in usage. Let’s dive deeper.
When to Use “Ser”
General Rule: Ser is for Permanent or Essential Qualities
Think of ser as describing things that define what something is, rather than how it feels or where it is.
Common Uses of Ser
Category | Examples (Spanish) | Examples (Portuguese) |
---|---|---|
Identity & Origin | Soy mexicano. (I am Mexican.) | Sou brasileiro. (I am Brazilian.) |
Physical & Personality Traits | Ella es alta y simpática. (She is tall and nice.) | Ele é inteligente e gentil. (He is intelligent and kind.) |
Professions | Mi padre es doctor. (My father is a doctor.) | Minha mãe é professora. (My mother is a teacher.) |
Time & Dates | Hoy es lunes. (Today is Monday.) | Agora é meio-dia. (It is noon now.) |
Possession | El coche es de Juan. (The car is Juan’s.) | A casa é dela. (The house is hers.) |
Events (Location of an event) | La fiesta es en mi casa. (The party is at my house.) | O show é no teatro. (The concert is at the theater.) |
📌 Tip: If something is an essential, unchanging fact, use ser.
When to Use “Estar”
General Rule: Estar is for Temporary Conditions or Locations
Think of estar as describing things that can change—how you feel, where you are, or a condition that isn’t permanent.
Common Uses of Estar
Category | Examples (Spanish) | Examples (Portuguese) |
---|---|---|
Locations (People & Things) | Estoy en casa. (I am at home.) | Estou no trabalho. (I am at work.) |
Emotions & Feelings | Estoy feliz hoy. (I am happy today.) | Ela está triste agora. (She is sad now.) |
Health | Estoy enfermo. (I am sick.) | Ele está cansado. (He is tired.) |
Weather Conditions | Está nublado. (It is cloudy.) | Está calor hoje. (It is hot today.) |
Actions in Progress (Present Continuous) | Estoy estudiando. (I am studying.) | Estou aprendendo português. (I am learning Portuguese.) |
📌 Tip: If something can change over time or is a temporary state, use estar.
When Meaning Changes Between Ser & Estar
Some adjectives change meaning depending on whether you use ser or estar. Here are some common examples:
Adjective | Ser + Adjective (Essential Quality) | Estar + Adjective (Temporary State) |
---|---|---|
Pronto | O jantar é pronto. (The dinner is ready-made.) | O jantar está pronto. (The dinner is ready now.) |
Rico | Ele é rico. (He is rich.) | Este bolo está rico! (This cake is delicious!) |
Mau | Ele é mau. (He is a bad person.) | Ele está mau. (He is feeling bad/sick.) |
Aborrecido | Eu sou aborrecido. (I am a boring person.) | Eu estou aborrecido. (I am annoyed.) |
📌 Tip: Ser describes what something is, while estar describes how something feels or changes.
Quick Trick to Remember: DOCTOR vs. PLACE
Many Spanish learners use DOCTOR and PLACE acronyms to differentiate ser and estar. These work in Portuguese too!
- DOCTOR (Ser) → Description, Occupation, Characteristics, Time, Origin, Relationships
- PLACE (Estar) → Position, Location, Action, Condition, Emotion
If you’re stuck, ask yourself:
👉 Is this describing what something IS? (Ser)
👉 Is this describing how something FEELS or CHANGES? (Estar)
Atypical Last Thoughts

Although ser and estar both mean “to be,” their usage depends on whether you are describing an essential quality (ser) or a temporary state (estar).
By remembering the DOCTOR vs. PLACE trick, practicing with adjectives that change meaning, and applying these verbs in real conversations, you’ll soon master the difference like a native speaker.
Now it’s your turn! Try making your own sentences using ser and estar in the comments below. Which rule do you find the trickiest?
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