For You: Flexibility And Efficiency. ADP supports a full spectrum of spending and reimbursement accounts, including flexible spending accounts (FSA), health savings accounts (HSA) and more. Our services offer flexible options and multiple opportunities for cost savings.
1 The cost of a septic tank alone runs about $500-$1,800 depending on size (ranging from 300-1,000 gallons) and type. 2  Piping and other needed items adds another $100-$200 to the total cost of materials. 3  New Mexico State University provides an introduction to installing a septic tank.
Financing options provided in partnership with Prosper. On average nationally, septic tank installation costs $4,610, with most homeowners spending between $2,447 and $6,772. This data is based on actual project costs as reported by HomeAdvisor members.