As of 2015, repairing or replacing a well water pump can range in cost from $165 to more than $1,700, with the average being around $800. The differences stem from the extent of the damage, the size of the pump, the materials used and the pump's distance from the house.
Costhelper.com reports that a shallow well jet pump can cost less than $500 to purchase, whereas a deep well jet pump costs anywhere from $175 to $800. This does not include the cost of labor for hiring a professional to complete the installation, adding to the overall costs incurred by a homeowner. A homeowner with rudimentary knowledge of plumbing can install a water pump; however, hiring a professional is strongly recommended.