Phrases Negotiation and Bargaining Phrases

My bottom line is...

B1

Meaning

My final, non-negotiable offer is...

Example sentences

John: So, what's your best price?

Alice: My bottom line is $500. I can't go any lower.

John: Hmm, that's a bit high for me. Let me see what I can do.

Alice: Okay, but my bottom line is still $500. This is my absolute lowest offer.