RTG Bills And RTG Timer is a time and billing program for sole practitioners and law firms. You can enter hourly rates, fixed fees, and expenses. Rates are taken from a rate table. Up to 99 rate tables can be created. RTG Timer lets you time your work as you do it. RTG Timer communicates with RTG Bills over a network, or it can be used standalone on a home computer, or on a laptop computer while you travel.