Standard septic tanks typically cost between $500 and $1,800 depending on their size, according to CostHelper. Piping and other necessary items generally add around $100 to $200 to this price.
Much of the cost of installing a septic tank is due to the labor required for installation and the cost of digging up and replacing dirt and turf. The total price varies by region, but installing or replacing a septic tank generally costs between $2,000 and $12,000. Most areas require permits for installing a new septic tank, and these can cost upwards of $1,000 or more depending on how much work the job requires.