That is no business of his.

Source: Tatoeba

This really doesn't concern you.

It really doesn't concern you.

Source: Tatoeba

Sorry, that was none of my business.

Source: Tatoeba

He is careless about money.

Source: Tatoeba

That's none of your business.

Source: Tatoeba

It has nothing to do with you.

Source: Tatoeba

Don't interfere with matters that do not concern you!

Source: Tatoeba

She doesn't pay attention to others; in other words, she is selfish.

Source: Tatoeba

I don't care if you trust me or not.

Source: Tatoeba