es asunto mío

my business

→ ser
phrase Rare #26,792
my business Used to say something concerns you personally or is your responsibility.
SP: No te preocupes, es asunto mío.
EN: Don’t worry, it’s my business.

Eso es asunto mío.

That's my business.

— Durante la tormenta (2018)

Ése si es asunto mío.

That's my business.

— La venganza de Manon (1986)

Cómo y por qué es asunto mío.

How and why is my business.

Es asunto mío.

It's my business.

Esto es asunto mío.

This is my business.