Installing carpet on stairs involves a lot more cutting, tucking, tack strips, and time. The shape of your staircase, along with the material and construction of the carpet you’re installing, will also increase the cost. Carpet installation on stairs will cost $400 to $800 in total, but it can go as high as $2,500 for difficult staircases, such as wrap-around, upholstered, or spiral staircases.

Decent carpet will last around 10 years on stairs. Some less durable carpets, like polyester, will only last five years on stairs. The ideal carpet, like wool or nylon, can last about 15 to 25 years. You’ll know when to replace it when it starts wearing down. You may have to replace it sooner if it's stained, whether due to water damage or pets.

A stair runner is a length of carpet installed in the center of the staircase, either on top of or in between hard materials installed on the staircase. The carpet doesn’t cover the entire length of the steps, making stair runners an aesthetic choice. Thankfully, if you want hard materials on your stairs to show through, a stair runner will make it safer, as the primary area you walk on will be less slippery thanks to the carpet.