You set up the matter with the billing mode of minimum fee, specify the pre-arranged minimum fee, and enter the hourly rates to keep track of hours to know when to start charging again. In other words, Abacus Accounting keeps track of the value of the hours and when the minimum fee is reached (even mid-time ticket). Additional fees are calculated for each time ticket. You cannot reset or rebill a minimum fee matter; it will not know to start re-tracking from zero. If you need to do that, change the matter to an hourly billing mode and manually keep track using Flat Rate tickets to manipulate when charging is to return to regular hourly rates.