Phrases Offering and Refusing Help

I'm quite capable of managing this on my own.

C1

Meaning

I can handle this independently.

Example sentences

John: Do you need any help with the presentation?

Alice: No, thanks. I'm quite capable of managing this on my own.

John: Alright, just let me know if you need anything.

Alice: I will. I'm quite capable of managing this on my own for now, thanks.