Different filters have different lifespans, and these can vary depending on how much you use and the quality of your water supply. In general, larger households with dirtier water will go through their filters much faster than small households with water that contains relatively few contaminants.
In general, you can expect a pre-sediment filter to last for three to six months while your carbon filter and post-filter will last for up to 12 months. If your water filtration system for the home contains UV filters, copper-zinc, or mineral stone filters, these will need replacing by a professional during your regular service.