This is really an impossible question to answer briefly or accurately.

Cost depends on what country you live in, what your health insurance covers, whether you will be using brand-name or generic medication, and a host of other factors. In countries with national health care where PrEP is approved, the medication is generally free or available at very low cost. In the United States, the retail cost of a 30-day supply of brand-name Truvada is quite high, but few people pay the retail price and most can get the drug at low or no cost.