breakpoint
noun [ C ]
(also break-point) uk/ˈbreɪkpɔɪnt/ usa price, condition, etc., at which discussions can no longer continue because people cannot agree:
The minimum price at which a seller is willing to trade determines the negotiating breakpoint.
the level at which the sales charges become lower when a financial product is being sold:
We offer a Class A purchase subject to an appropriate sales charge breakpoint: 4.75% at $10,000; 3.75% at $100,000; or 2.50% at $250,000.