An improved billing system for communication service is disclosed. A printed and/or online invoice will be generated for a subscriber's account and will be structured to include a visual gauge that depicts the extent of use for the billing period at issue. More particularly, the visual gauge will take the form of a table or listing that shows a continuum of possible time-increment or data-increment-ranges and that shows, for each range, the associated cost. The visual gauge will then include a visual marker that highlights or otherwise points out the increment-range into which the subscriber's use fell in the billing period at issue. Conveniently, the invention thus enables a subscriber to readily visualize where the subscriber's use fell within the continuum of possible increment-ranges.