It depends on a few factors, such as the type of phone jack, the complexity of the installation, and your location. Generally speaking, though, you can expect to pay somewhere between $50 and $100 for a professional installation.

It costs about $75 to have a phone jack installed. Some providers may charge more or less, but that's the average cost. If you already have a phone line, the installation is usually free. If you don't have a phone line, the provider will need to install one before they can install the phone jack.