Brake pads do not need professional installment. You can read the manufacturer manual to replace the older brake pads. However, if you want to get the brake pads replaced by a professional, then expect the cost to be around $100-$300. Basically, the price varies depending on the mechanic and type of brake pad you would like to install. If you want to get both the front and rear sets of brake pads replaced, then the replacement can be expensive. If you choose DIY, on the other hand, then you can save quite a good amount on installation. The installation doesn’t need heavy-duty tools and mechanical knowledge. You only need to follow the manufacturers’ instructions to get the work done. If you DIY the brake pads replacement, you will pay $20-$100.