The cost of labor to install vinyl plank flooring varies depending on the location, the type of vinyl, and the contractor. The cost of labor can range from $1 to $3 per square foot. However, some contractors may charge more for additional services such as removing old flooring, subfloor preparation, and installing underlayment. The cost of labor can also vary depending on the geographical location, as the cost of living is higher in urban areas than rural ones. It is recommended to get quotes from local installers to get a more accurate estimate of the cost of labor in your area.