Which term describes a broker's ability to charge varying commission rates?

The term that best describes a broker's ability to charge varying commission rates is "Negotiable commission." This term emphasizes the flexibility and freedom brokers have to set their commission rates based on negotiations with clients. Unlike standard or fixed commission structures, which imply a set rate that does not change, a negotiable commission allows for adjustments based on specific circumstances, market conditions, services provided, and the agreement between the broker and the client. This aspect of brokerage practice fosters a more personalized service and can lead to better alignment of interests between the broker and their clients, as both parties can discuss and agree on a commission structure that reflects the value of the service rendered.