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Septic Cost Report 2026

Published by Cornelia Cove LLC. Data licensed CC BY 4.0.

Last updated: October 16, 2026

Summary

  • Most septic tank pump-outs cost $297–$584 in 2026, with a national average of $432 (Angi and HomeAdvisor, checked October 2026).
  • Tank size matters most: from $250–$550 for a 750-gallon tank up to $550–$1,250 for 1,750 gallons.
  • A 1,000-gallon tank serving four people needs pumping about every 2.6 years (Oregon State University Extension table).
  • Most new systems cost $3,590–$12,463, averaging $8,016 (HomeAdvisor). Conventional (anaerobic) systems run $3,000–$8,000. Aerobic and mound systems run $10,000–$20,000.

All figures are national planning ranges from cited sources, not quotes. See our methodology for how we pick and update figures.

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Every table in this report is available as a CSV file, licensed CC BY 4.0. Reuse is free with attribution and a link back to this page.

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Suggested credit: “Source: Septic Tank Pumping Pros 2026 Cost Report (Cornelia Cove LLC)”

Frequently Asked Questions

How much does it cost to pump a septic tank in 2026?

Most septic tank pump-outs cost $297–$584, with a national average of $432, according to both Angi and HomeAdvisor (checked October 2026). Tank size is the biggest factor: a 1,000-gallon tank typically costs $325–$700.

How often should a septic tank be pumped?

It depends on tank size and household size. Using Oregon State University Extension's pumping table, a 1,000-gallon tank serving four people needs pumping about every 2.6 years, and the same tank with six people about every 1.5 years.

How much does a new septic system cost?

Most installations cost $3,590–$12,463, averaging $8,016 (HomeAdvisor). Conventional (anaerobic) systems run $3,000–$8,000. Aerobic and mound systems run $10,000–$20,000.

Is this report a quote?

No. These are national planning ranges taken from published sources, plus official fee schedules for the Texas counties listed. Your price depends on tank size, access, distance and local rules.

Sources

  1. Angi — How Much Does It Cost to Pump a Septic Tank? (third-party estimate)
  2. HomeAdvisor — Septic Tank Pumping Cost (third-party estimate)
  3. HomeAdvisor — Septic System Installation Cost (third-party estimate)
  4. Oregon State University Extension — Septic Tank Maintenance (EC 1343, rev. 2022)

Corrections: email partners@corneliacove.com. We check reported errors against the cited source and update the page.