A method and system is disclosed for dynamic reverse activity bit (RAB) offset adjustment based on RF conditions. A base station controller (BSC) or radio node controller (RNC) or similar network device will determine a rate of decrease of aggregate reverse-link noise measured at a sector, and from the decrease rate the BSC will further determine an amount of time needed for the sector to detect the aggregate reverse-link noise to cross below a threshold level. The BSC will then set a RAB offset for the sector to be at least as large as the determined amount of time.