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Free · 2026

Septic system cost calculator

Free and instant. Enter the size and your state to see a 2026 price range.

Septic system Cost Calculator

2026 updated prices

Total Estimated Cost

$5,000$20,000

Ballpark estimate — your final price depends on scope and materials.

Cost Breakdown

Tank
$2,000$8,00040%
Drain field
$1,500$6,00030%
Excavation
$1,000$4,00020%
Permit and perc test
$500$2,00010%

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What's included

  • Tank
  • Drain field
  • Excavation
  • Permit and perc test

What drives the cost

  • Conventional vs aerobic
  • Soil and perc results
  • Tank size
  • Site access