vs 

QUICK ANSWER
"Por lo tanto" is a phrase which is often translated as "therefore", and "por eso" is a phrase which is often translated as "that's why". Learn more about the difference between "por lo tanto" and "por eso" below.
por lo tanto(
pohr
 
loh
 
tahn
-
toh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. therefore
Has incurrido en una infracción, por lo tanto vas a la cárcel.You have broken the law; therefore, you are going to prison.
b. so
Te trato con respeto, por lo tanto espero que hagas lo mismo por mí.I treat you with respect, so I expect you to do the same for me.
c. thus (formal)
Firmó un contrato con nosotros, por lo tanto esperamos que cumpla con sus obligaciones.You signed a contract with us, thus we expect you to honor your obligations.
d. hence (formal)
Su rival político amenazó con ir a la prensa, por lo tanto se retiró de la carrera.His political rival threatened to go to the media, hence he withdrew from the race.
Copyright © 2025 Dictionary Media Group, Inc.
por eso(
pohr
 
eh
-
soh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. that's why
Está lloviendo. Por eso todo el mundo anda con paraguas.It's raining. That's why everyone has an umbrella out.
b. that is why
Alberto está cocinando, por eso huele tan bien en la casa.Alberto is cooking, that is why it smells so good in the house.
c. so
Me sentía sola y necesitaba hablar con alguien, por eso te llamé.I felt lonely and needed to talk to someone, so I called you.
d. for that reason
¿Por qué viniste a Nueva York? - Vine a esta ciudad para estudiar interpretación. Lo hice solamente por eso.Why did you come to New York? - I came to this city to study acting. I did it only for that reason.
Copyright © 2025 Dictionary Media Group, Inc.