Hi, I’m Kodak.
Many Spanish learners are taught the following rule:
Use estar for temporary things.
It sounds simple.
It also seems to explain some basic sentences:
Ana es alta.
Ana is tall.
Ana está cansada.
Ana is tired.
Height usually lasts longer than tiredness, so the permanent-versus-temporary rule appears to work.
Unfortunately, it stops working as soon as we examine other common sentences:
Ana es estudiante.
Ana is a student.
Being a student is not permanent.
Madrid está en España.
Madrid is in Spain.
Madrid’s location is not temporary.
Está muerto.
He is dead.
Death is normally permanent, but Spanish still uses estar.
These examples reveal an important truth:
Estar does not automatically mean temporary.
In this article, we will examine why the permanent-versus-temporary rule is a myth and replace it with a more useful way to understand ser and estar.
Was everything I learned about permanent ser and temporary estar wrong?
Not completely.
The shortcut sometimes predicts the correct verb because characteristics often last longer than conditions.
The problem is that duration is not the grammatical rule that actually controls the choice.
- 1 Quick Answer: Is Ser Permanent and Estar Temporary?
- 2 Why the Permanent-Temporary Rule Seems to Work
- 3 Myth-Breaking Example 1: Professions and Roles Can Change
- 4 Myth-Breaking Example 2: Age and Life Stages Change
- 5 Myth-Breaking Example 3: Time and Dates Use Ser
- 6 Myth-Breaking Example 4: Events Use Ser for Time and Place
- 7 Myth-Breaking Example 5: Physical Location Uses Estar
- 8 Myth-Breaking Example 6: Estar Muerto Is Not Temporary
- 9 Myth-Breaking Example 7: Long-Lasting States Use Estar
- 10 Myth-Breaking Example 8: Ser Can Describe One Occasion
- 11 The Better Model: Ser Identifies, Classifies, and Characterizes
- 12 The Better Model: Estar Describes State, Condition, Location, and Result
- 13 Ser and Estar Express Different Viewpoints
- 14 Ser Feliz vs. Estar Feliz Does Not Mean Permanent vs. Temporary
- 15 Some Adjectives Change Meaning with Ser and Estar
- 16 Resulting States Explain Many Uses of Estar
- 17 Is “Essence vs. Condition” a Better Rule?
- 18 Is “Characteristics vs. States” a Better Rule?
- 19 A Practical Decision Guide for Ser and Estar
- 20 Common Sentences That Disprove the Myth
- 21 Common Mistakes Caused by the Myth
- 21.1 Mistake 1: Using estar for a temporary profession
- 21.2 Mistake 2: Using ser for a permanent location
- 21.3 Mistake 3: Using ser casado because marriage is long-lasting
- 21.4 Mistake 4: Using ser muerto because death is permanent
- 21.5 Mistake 5: Changing the verb whenever a time expression appears
- 21.6 Mistake 6: Assuming every estar sentence will soon stop being true
- 22 Natural Conversation Examples
- 23 Useful Ser Expressions to Memorize
- 24 Useful Estar Expressions to Memorize
- 25 Frequently Asked Questions About the Ser-Estar Myth
- 25.1 Is ser permanent in Spanish?
- 25.2 Is estar temporary in Spanish?
- 25.3 Why do teachers say ser is permanent and estar is temporary?
- 25.4 What should I learn instead of permanent versus temporary?
- 25.5 Can ser describe temporary things?
- 25.6 Can estar describe permanent things?
- 25.7 Why does está muerto use estar?
- 25.8 Why does ser estudiante use ser if being a student is temporary?
- 25.9 Why does Madrid está en España use estar?
- 25.10 Do event locations use ser or estar?
- 25.11 Is essence versus state a perfect rule?
- 25.12 Should beginners ever use the permanent-temporary rule?
- 26 Ser and Estar Myth: Final Summary
- 27 Related Guide
Quick Answer: Is Ser Permanent and Estar Temporary?
No.
Ser commonly identifies, defines, classifies, evaluates, or characterizes someone or something.
Estar commonly describes a state, condition, physical location, result, appearance, or ongoing activity.
The situation described with ser may change.
The situation described with estar may last indefinitely.
A safer beginner distinction is:
How are we identifying, classifying, or characterizing the subject?
Estar
In what state, condition, situation, or location is the subject?
Then why do so many beginner lessons teach permanent versus temporary?
Because it is short, memorable, and occasionally useful.
Statements about identity and characteristics often feel stable, while emotions and conditions often change.
But a memorable tendency should not be mistaken for a complete grammatical rule.
Why the Permanent-Temporary Rule Seems to Work
The myth survives because many textbook examples are carefully chosen to support it.
The house is large.
→ Size appears relatively stable.
La casa está sucia.
The house is dirty.
→ Dirt can be cleaned.
Carlos es tranquilo.
Carlos is a calm person.
→ A personality description appears relatively stable.
Carlos está nervioso.
Carlos is nervous.
→ A nervous feeling may pass.
These sentences are correct, but they do not prove that permanence determines the verb.
They only show that:
while states and conditions often change more quickly.
The difference between ser and estar is primarily about how the speaker presents the information—not a prediction about how long it will remain true.
So permanent versus temporary is more of a pattern than a rule?
Exactly.
It describes a tendency found in many beginner examples.
It does not explain professions, locations, event times, resulting states, or adjectives whose meanings change.
Myth-Breaking Example 1: Professions and Roles Can Change
Spanish uses ser for professions, roles, memberships, and classifications.
Ana es profesora.
Ana is a teacher.
Carlos es estudiante.
Carlos is a student.
Marta es la directora del proyecto.
Marta is the project director.
Luis es miembro del equipo.
Luis is a member of the team.
None of these roles must last forever.
A student graduates. A teacher changes careers. A director leaves a project. A team member resigns.
Spanish still uses ser because the noun identifies or classifies the person.
“Will this last forever?”
The important question is:
“Does this identify the person’s role or category?”
If Ana is only a teacher for one month, do I still say Ana es profesora?
Yes, if you are identifying her profession or role during that period.
The role can be brief and still use ser.
Its function in the sentence matters more than its duration.
Myth-Breaking Example 2: Age and Life Stages Change
Some characteristics expressed with ser clearly change over time.
El niño es joven.
The child is young.
Mi abuelo es mayor.
My grandfather is elderly.
Es un bebé.
He or she is a baby.
No one remains a baby or young forever.
Spanish uses ser because the sentence characterizes or classifies the person at the relevant stage of life.
Doesn’t that prove that ser can describe something temporary?
Yes.
Youth is temporary, but it can still characterize a person at a particular time.
Ser does not promise that a characteristic will remain true forever.
Myth-Breaking Example 3: Time and Dates Use Ser
Spanish uses ser to tell the time, day, and date.
Es la una.
It is one o’clock.
Son las tres.
It is three o’clock.
Hoy es lunes.
Today is Monday.
Hoy es 12 de agosto.
Today is August 12.
Three o’clock lasts for only a moment. Monday lasts for one day.
These are among the least permanent facts we regularly express, yet Spanish uses ser.
The sentence identifies the current time or date; it does not describe a state with estar.
If three o’clock disappears after one minute, why does it use supposedly “permanent” ser?
Because ser is not actually a permanent verb.
In time expressions, it identifies what time it is.
This is one of the clearest examples showing that the shortcut cannot be the real rule.
Myth-Breaking Example 4: Events Use Ser for Time and Place
Spanish normally uses ser to say when or where an event takes place.
La reunión es mañana.
The meeting is tomorrow.
La fiesta es esta noche.
The party is tonight.
El concierto es en el estadio.
The concert is at the stadium.
La boda es en junio.
The wedding is in June.
A meeting, party, concert, or wedding is limited in time.
Spanish still uses ser because the sentence identifies the time or venue associated with the event.
I thought all locations used estar. Why is the concert es en el estadio?
Physical people and objects normally use estar for location.
Events normally use ser to identify where they take place.
Compare El concierto es en el estadio with El cantante está en el estadio.
The concert is at the stadium.
→ Venue of an event
El cantante está en el estadio.
The singer is at the stadium.
→ Physical location of a person
Myth-Breaking Example 5: Physical Location Uses Estar
Spanish normally uses estar for the physical location of people, objects, buildings, cities, and countries.
Ana está en casa.
Ana is at home.
El libro está en la mesa.
The book is on the table.
Madrid está en España.
Madrid is in Spain.
Japón está en Asia.
Japan is in Asia.
A book may move in a few minutes, but Madrid and Japan are not expected to move.
All these sentences use estar because they locate the subject physically.
The duration of the location does not normally change the verb.
Physical location uses estar.
If I plan to live in Madrid permanently, do I still say Estoy en Madrid?
Yes, when you are stating your physical location.
You can also say Vivo en Madrid when you specifically mean that you live there.
A long-lasting location does not turn estar into ser.
Myth-Breaking Example 6: Estar Muerto Is Not Temporary
One of the most famous counterexamples to the myth is:
He is dead.
She is dead.
It is dead.
Spanish uses estar because muerto describes the resulting state of dying.
The state is normally irreversible, but permanence is not the criterion.
Compare:
El hombre está muerto.
The man is dead.
El árbol está muerto.
The tree is dead.
This seems like the strongest proof that estar does not mean temporary.
It is certainly one of the clearest examples.
Estar muerto describes a resulting condition, not a short-lived one.
The permanence of death does not affect the grammatical construction.
Myth-Breaking Example 7: Long-Lasting States Use Estar
Many states expressed with estar can last for years or decades.
Está casado.
He is married.
Está jubilada.
She is retired.
El edificio está abandonado.
The building is abandoned.
La tienda está cerrada desde hace cinco años.
The store has been closed for five years.
La estatua está dañada desde la guerra.
The statue has been damaged since the war.
The condition may be very long-lasting.
Estar presents it as the state or result in which the subject is found.
Marriage can last a lifetime. Why is it commonly estar casado?
Because the expression presents marriage as a civil or personal state.
It does not predict when that state will end.
The difference is about how Spanish structures the information, not the number of years involved.
Myth-Breaking Example 8: Ser Can Describe One Occasion
Ser can characterize someone’s behavior during one limited event.
El camarero fue muy amable conmigo.
The server was very kind to me.
Ana fue muy paciente durante la reunión.
Ana was very patient during the meeting.
Carlos fue valiente en ese momento.
Carlos was brave at that moment.
These sentences do not claim that the person is always kind, patient, or brave.
They use ser to evaluate or characterize the person’s behavior in a particular situation.
I thought one-time behavior had to use estar.
Not necessarily.
Spanish can use ser to characterize how someone behaved during an event.
The statement is limited by the context even though the verb is a form of ser.
The Better Model: Ser Identifies, Classifies, and Characterizes
Instead of thinking “permanent,” associate ser with functions such as:
classification
profession or role
origin and nationality
general or contextual characterization
material
possession
time and date
event time and location
Identity
Ella es Laura.
She is Laura.
Classification
La ballena es un mamífero.
The whale is a mammal.
Profession or role
Es ingeniero.
He is an engineer.
Origin
Es de Chile.
He or she is from Chile.
Material
La mesa es de madera.
The table is made of wood.
Possession
El libro es de Ana.
The book belongs to Ana.
Time
Son las ocho.
It is eight o’clock.
Event venue
La conferencia es en el hotel.
The conference is at the hotel.
Do all these uses share one simple meaning?
They are connected by identification and characterization, but no English slogan covers every construction perfectly.
That is normal when learning a high-frequency verb.
Use the core viewpoint together with the major usage patterns.
The Better Model: Estar Describes State, Condition, Location, and Result
Instead of thinking “temporary,” associate estar with functions such as:
emotional and physical condition
resulting state
current appearance or evaluation
availability and operating condition
actions in progress
Physical location
El coche está fuera.
The car is outside.
Emotional state
Ana está preocupada.
Ana is worried.
Physical condition
Carlos está enfermo.
Carlos is sick.
Resulting state
La puerta está cerrada.
The door is closed.
Operating condition
El museo está abierto.
The museum is open.
Action in progress
Ana está trabajando.
Ana is working.
Does “state” mean something that must eventually change?
No.
A state is simply the condition in which the subject is presented.
It may change soon, remain for years, or be effectively irreversible.
Ser and Estar Express Different Viewpoints
The same person or object may be described with both verbs because the speaker is communicating different information.
Ana is a calm person.
→ Calmness characterizes her.
Ana está tranquila.
Ana feels or appears calm.
→ Calmness is the state in which she is found.
The difference does not require us to decide exactly how many hours or years the calmness lasts.
Can Ana be generally calm but temporarily nervous?
Yes.
You can say Ana es tranquila, pero hoy está nerviosa.
The sentence contrasts her general characterization with her current emotional state.
Ser Feliz vs. Estar Feliz Does Not Mean Permanent vs. Temporary
Both ser feliz and estar feliz are possible.
Ana is a happy person.
Ana has a happy or fulfilling life.
Ana está feliz.
Ana feels happy in the present situation.
Ser feliz does not mean that Ana will remain happy every second for the rest of her life.
Estar feliz does not tell us exactly when her happiness will end.
The verb changes the viewpoint from general characterization to experienced state.
If I say Soy feliz, am I claiming permanent happiness?
No.
You are characterizing yourself or your life as happy from a broad viewpoint.
You may still experience sadness at particular moments.
Some Adjectives Change Meaning with Ser and Estar
The permanent-versus-temporary myth becomes especially dangerous when the verb changes the normal English translation.
He is boring.
Está aburrido.
He is bored.
Es listo.
He is clever.
Está listo.
He is ready.
Es rico.
He is wealthy.
La comida está rica.
The food tastes delicious.
Es verde.
It is green in color.
Está verde.
It is unripe or underdeveloped.
These pairs cannot be understood by duration alone.
You need to learn how the adjective interacts with each verb.
Could I accidentally insult myself by choosing the wrong verb?
Yes.
Soy aburrido means “I am boring,” not “I am bored.”
For the feeling of boredom, say Estoy aburrido or Estoy aburrida.
Resulting States Explain Many Uses of Estar
Many adjectives and participles with estar describe the result of an earlier event or change.
→ La puerta está cerrada.
The door is closed.
Someone broke the window.
→ La ventana está rota.
The window is broken.
Someone prepared the food.
→ La comida está preparada.
The food is prepared.
The person died.
→ Está muerto.
He or she is dead.
The focus is the state that exists as a result.
There is no requirement that the result be temporary.
Is that why open and closed usually use estar?
Yes. Está abierto and está cerrado commonly describe the resulting or operating condition.
The door, store, or museum is found in that state.
The state can last for minutes or for many years.
Is “Essence vs. Condition” a Better Rule?
Some lessons replace permanent versus temporary with:
Estar = condition
This can be more useful, but the word essence may create a new misunderstanding.
A profession, date, event venue, or material is not necessarily someone’s philosophical essence.
For example:
La reunión es en Madrid.
The meeting is in Madrid.
Madrid is not the “essence” of the meeting. The sentence identifies its venue.
A clearer framework is:
identity, classification, definition, relationship, characterization, time, and event information
Estar:
state, condition, result, physical location, appearance, and ongoing activity
Should I completely avoid the word “essence” when learning ser?
You may use it as a loose memory aid for some examples.
Do not treat it as a literal rule covering every use of ser.
Identity and classification are usually clearer and more practical concepts for beginners.
Is “Characteristics vs. States” a Better Rule?
For sentences with adjectives, the following distinction is often useful:
characterizes or evaluates the subject
Estar + adjective
describes the condition, state, appearance, or result in which the subject is found
Compare:
La sopa es buena.
The soup is good as a type, recipe, or general evaluation.
La sopa está buena.
The soup tastes good.
However, even this distinction does not replace learning individual constructions such as:
estar en — to be physically located in
estar + gerund — to be doing something
ser + time/date — to tell time or identify a date
Does that mean there is no useful rule at all?
There are useful patterns, but not one slogan that solves every sentence.
Use the general viewpoint to understand the system, then learn the major constructions and common adjective pairs.
This is more work at first, but it prevents many later mistakes.
A Practical Decision Guide for Ser and Estar
Use the following questions when choosing a verb.
Name, profession, role, category, relationship
→ Use ser.
Es Ana.
She is Ana.
Es profesora.
She is a teacher.
Question 2: Am I stating origin, material, possession, time, date, or event information?
→ Use ser.
Es de México.
He or she is from Mexico.
Es de madera.
It is made of wood.
La fiesta es mañana.
The party is tomorrow.
Question 3: Am I stating the physical location of a person, object, city, or place?
→ Use estar.
Ana está en casa.
Ana is at home.
Madrid está en España.
Madrid is in Spain.
Question 4: Am I describing a state, condition, result, appearance, or availability?
→ Estar is likely.
Está cansado.
He is tired.
Está roto.
It is broken.
Está abierto.
It is open.
Question 5: Am I describing an action in progress?
→ Use estar + gerund.
Está estudiando.
He or she is studying.
Should duration appear anywhere in my decision process?
It may help you interpret some adjective sentences, but it should not be your first question.
First identify the grammatical function and viewpoint.
Duration is supporting context, not the central rule.
Common Sentences That Disprove the Myth
| Spanish sentence | Why it breaks the myth | Real reason for the verb |
|---|---|---|
| Es estudiante. | Student status changes. | Ser classifies the person. |
| Hoy es lunes. | Monday lasts one day. | Ser identifies the day. |
| Son las tres. | The time changes immediately. | Ser tells the time. |
| La fiesta es esta noche. | The party is a limited event. | Ser identifies event time. |
| Madrid está en España. | The location is long-lasting. | Estar expresses physical location. |
| Está muerto. | Death is normally permanent. | Estar expresses a resulting state. |
| Está casado. | Marriage may last a lifetime. | Estar presents marital status as a state. |
| La tienda está cerrada desde hace años. | The condition has lasted for years. | Estar describes the resulting condition. |
Which one of these examples should I remember when someone says “estar is temporary”?
Está muerto is memorable because the state is clearly not temporary.
Madrid está en España is also useful because it shows that permanent location still uses estar.
For ser, remember Hoy es lunes or Es estudiante.
Common Mistakes Caused by the Myth
Mistake 1: Using estar for a temporary profession
Ana está profesora este año.
Correct:
Ana es profesora este año.
Ana is a teacher this year.
The phrase este año makes the role temporary, but the profession still uses ser.
Mistake 2: Using ser for a permanent location
Japón es en Asia.
Correct:
Japón está en Asia.
Physical location uses estar.
Mistake 3: Using ser casado because marriage is long-lasting
Está casado.
He is married.
Mistake 4: Using ser muerto because death is permanent
Es muerto.
Correct:
Está muerto.
Mistake 5: Changing the verb whenever a time expression appears
Adding today, this year, or for one week does not automatically require estar.
Este año es el director.
This year, he is the director.
Hoy es muy amable con todos.
Today, he is very kind to everyone.
Context can limit the statement even when the speaker uses ser.
Mistake 6: Assuming every estar sentence will soon stop being true
El castillo está abandonado desde hace siglos.
The castle has been abandoned for centuries.
The state is long-lasting, but it remains a state described with estar.
If I add hoy or “today,” shouldn’t that force me to use estar?
No. A time expression limits when the statement applies, but it does not automatically select the verb.
You still need to decide whether you are characterizing, identifying, describing a state, locating, or using another established construction.
Time words and verb choice are separate questions.
Natural Conversation Examples
A temporary role with ser
Is Ana the director?
B: Sí, pero solo es la directora durante este proyecto.
Yes, but she is only the director during this project.
The role is explicitly temporary, but ser identifies Ana’s position.
A permanent-looking location with estar
Where is Barcelona?
B: Está en España.
It is in Spain.
The location is stable, but physical location uses estar.
General quality and current state
Carlos is normally very calm.
B: Sí, pero hoy está nervioso por el examen.
Yes, but today he is nervous about the exam.
An event and a person in the same location
Where is the conference?
B: Es en el hotel central.
It is at the central hotel.
A: ¿Y dónde está la profesora?
And where is the professor?
B: Está en la recepción.
She is at reception.
A long-lasting state
Is the factory still closed?
B: Sí. Está cerrada desde hace veinte años.
Yes. It has been closed for twenty years.
Do native speakers think about all these categories before choosing a verb?
Usually not consciously.
They have heard the patterns repeatedly and know which constructions sound natural.
Learners use the categories as training tools until repeated exposure builds the same intuition.
Useful Ser Expressions to Memorize
to be from a place
ser de + material
to be made of a material
ser de + person
to belong to a person
ser + profession
to have a profession or role
ser + time/date
to tell the time or identify the date
ser en + place
to identify the venue of an event
Examples:
Es de Perú.
He or she is from Peru.
La mesa es de metal.
The table is made of metal.
El teléfono es de Carlos.
The phone belongs to Carlos.
Useful Estar Expressions to Memorize
to be physically located somewhere
estar bien/mal
to be well/unwell; to be okay/not okay
estar cansado
to be tired
estar abierto/cerrado
to be open/closed
estar muerto/vivo
to be dead/alive
estar + gerund
to be doing something
Examples:
Está en el trabajo.
He or she is at work.
Está bien.
He or she is fine.
It is okay.
Está durmiendo.
He or she is sleeping.
Is memorizing complete expressions better than memorizing abstract rules?
You need both.
The general model helps you understand new sentences, while complete expressions help you speak without rebuilding every sentence from zero.
For example, memorize ser de, estar en, and estar + gerund as units.
Frequently Asked Questions About the Ser-Estar Myth
Is ser permanent in Spanish?
No. Ser does not inherently mean permanent. It can describe changeable professions, roles, ages, dates, times, event information, and behavior limited to a particular situation.
Is estar temporary in Spanish?
No. Estar does not inherently mean temporary. It can describe permanent or long-lasting physical locations, marital status, abandoned buildings, closed businesses, damage, and death.
Why do teachers say ser is permanent and estar is temporary?
It is a memorable beginner shortcut that works with some common adjective examples. However, it describes a tendency rather than the actual grammatical distinction.
What should I learn instead of permanent versus temporary?
Learn that ser commonly identifies, classifies, defines, relates, or characterizes, while estar commonly describes state, condition, physical location, result, appearance, or ongoing activity.
Can ser describe temporary things?
Yes. Examples include Es estudiante, Hoy es lunes, Son las tres, and La reunión es mañana.
Can estar describe permanent things?
Yes. Examples include Madrid está en España and Está muerto. It can also describe conditions that last for decades.
Why does está muerto use estar?
Estar muerto presents death as the resulting state in which the subject is found. The duration or permanence of the state does not determine the verb.
Why does ser estudiante use ser if being a student is temporary?
Because estudiante classifies or identifies the person’s role. A classification can change and still use ser.
Why does Madrid está en España use estar?
Because Spanish normally uses estar for physical location, even when that location is stable or permanent.
Do event locations use ser or estar?
Event venues normally use ser: La fiesta es en mi casa. People and physical objects use estar for location: Ana está en mi casa.
Is essence versus state a perfect rule?
No. It may help with some sentences, but “essence” does not clearly explain time, dates, possession, materials, or event venues. Identity, classification, characterization, state, condition, and location are more practical concepts.
Should beginners ever use the permanent-temporary rule?
It may serve as an initial hint in a limited group of adjective sentences, but it should not be used as the main decision rule.
Forget Duration: A 30-Second Ser/Estar Check
Do not ask how long it lasts. Ask what job the sentence is doing.
Es profesora. Es de Chile.
Son las tres. La fiesta es manana.
Madrid esta en Espana.
Esta cerrado. Esta muerto.
Esta trabajando.
※ Duration is not the test — Madrid esta en Espana never changes, and Es estudiante can change next year. Both still follow the rule above.
Ser and Estar Myth: Final Summary
Ser is permanent and estar is temporary.
● Reality:
Duration does not directly determine the verb.
● Ser commonly expresses:
identity, classification, profession, role, origin, nationality, material, possession, characterization, time, date, and event information.
● Estar commonly expresses:
state, condition, physical location, resulting situation, appearance, availability, and an action in progress.
● Ser can describe changeable facts:
Es estudiante.
Hoy es lunes.
La reunión es mañana.
● Estar can describe permanent or long-lasting facts:
Madrid está en España.
Está muerto.
El edificio está abandonado desde hace décadas.
● Better beginner question:
Am I identifying or characterizing the subject?
→ Ser may be appropriate.
Am I describing its state, condition, result, or physical location?
→ Estar may be appropriate.
● Final advice:
Use the general viewpoint together with common constructions and complete expressions.
Can you give me one sentence to remember instead of “ser is permanent”?
Remember this:
Ser helps identify or characterize; estar describes the state or place in which something is found.
It is not perfect on its own, but it is far safer than permanent versus temporary.
What should I do when both verbs still seem possible?
Check whether the adjective changes meaning, look at common expressions, and compare several complete examples.
Sometimes both verbs are possible but communicate different viewpoints.
The goal is not only to find a grammatically possible sentence, but to express the meaning you intend.
So the myth is easy to memorize, but the viewpoint model is more accurate?
Exactly.
The shortcut may help you survive your first lesson, but it should not control your Spanish afterward.
Replace it with usage patterns, viewpoint, and real examples as early as possible.
Do not ask only, “Is this permanent or temporary?”
Ask what job the verb is doing: identifying, classifying, characterizing, locating, or describing a state and result.
That change in thinking will make both basic and advanced uses of ser and estar much easier to understand.
Related Guide
For the complete picture of how ser and estar work together, read our main guide: Ser vs. Estar: The Difference and the Rules That Actually Work.
