Systems and methods to determine prices for communication leads generated from pay for performance advertisements. In one embodiment, a method includes: providing an advertisement with a reference to customers on behalf of a specific party; facilitating communications between the party and a customer via the reference; and charging the party according to a price bid specified by the party in response to a lead to communications between the party and the customer facilitated via the reference. In one embodiment, a fee for the communication leads is determined according to the price bid specified by the party for the advertisement and at least one predetermined rule, which may be based on the geographic area of the advertisement, the categories of the advertisement, the price bids of a selected set of advertisements, and/or the query that causes the advertisement to be presented.