Septic tank repair costs $627 to $3,041 for most homeowners, with an average of $1,828. That average and range appear identically on both Angi and HomeAdvisor, which are corporate siblings, and Angi ties its 2026 national average to 1,763 verified projects from Angi Pros.[1][2] HomeGuide, a separate owner, puts the national average at $1,900 with an average range of $600 to $3,000.[3] Major repairs can run $6,500 or more.[2]
Septic tank repair cost by source
| Source | Average (per repair) | Typical range (per repair) |
|---|---|---|
| Angi | $1,828 | $627 – $3,041 |
| HomeAdvisor | $1,828 | $627 – $3,041 |
| HomeGuide | $1,900 | $600 – $3,000 |
Angi and HomeAdvisor are corporate siblings, and their septic repair figures are identical; matching figures alone do not establish independent corroboration. Angi ties its 2026 national average to 1,763 verified projects from Angi Pros; HomeAdvisor’s page states no project-count basis. HomeAdvisor’s body text also carries a second version of its own top line ($1,830 average, $629 to $3,038); the page’s header and summary figure is used here. HomeGuide is a separate owner: it reports a national average of $1,900 with an average range of $600 to $3,000, a minimum of $100 and a maximum of $6,100; these are separately published figures, and the pages state no shared sourcing.
Repair cost by repair type
Filter replacements cost $200 to $300 across all three sources, while line repairs reach $4,200 to $5,000.[1][2][3]
| Repair | Angi (per repair) | HomeAdvisor (per repair) | HomeGuide (per repair) |
|---|---|---|---|
| Baffles | $300 – $900 | $300 – $900 | outlet baffle $250 – $900 |
| Pump | $250 – $1,000 | $250 – $1,000 | repair $250 – $400; replacement $500 – $1,300 |
| Filter | $200 – $300 | $200 – $300 | $200 – $300 |
| Line | $1,000 – $4,200 | $1,000 – $4,200 | $1,000 – $5,000 |
| Lid | $150 – $500 | $150 – $500 | $150 – $600 |
Septic repair cost by repair type, with each source’s row label reported as published. The filter row is identical across all three pages; the Angi and HomeAdvisor rows are identical throughout, and the pages are corporate siblings – matching figures alone do not establish independent corroboration. HomeAdvisor’s prose puts pump repair alone at $250 to $400 with replacement at $1,000 or more, matching HomeGuide’s pump-repair row. HomeGuide’s table lists line repair at $1,000 to $5,000 while its prose on the same page says $150 to $3,800 depending on the problem, location and pipe material; the table figure is shown. Sources: Angi, HomeAdvisor and HomeGuide.
Repair cost by tank material
Plastic tanks are the cheapest to repair at $150 to $2,000, while concrete runs $700 to $5,000 and fiberglass $750 to $7,500.[1][2]
| Tank material | Repair cost (Angi & HomeAdvisor, per repair) |
|---|---|
| Plastic | $150 – $2,000 |
| Concrete | $700 – $5,000 |
| Fiberglass | $750 – $7,500 |
Repair cost by tank material, identical on both sibling pages. Sources: Angi and HomeAdvisor.
Inspection costs
Both sibling sources put a standard septic inspection at $100 to $200 and a sewer camera inspection at $250 to $1,175.[1][2]
Labor, permits and related fees
Angi notes most contractors charge a project rate, but hourly billing runs about $125 to $250 per hour.[1] Permits for a full septic replacement average $460 to $2,770, while smaller repairs may only need a $20 to $50 permit.[1]
Pumping and maintenance
HomeAdvisor puts one-time septic tank pumping at $290 to $550 on average, and HomeGuide puts unclogging or pumping a backed-up tank at $295 to $610; these are separately published figures, and the pages state no shared sourcing.[2][3] Angi puts routine maintenance visits at $300 to $500.[1] HomeGuide lists homeowner-added bacteria treatments at $15 to $25, but the U.S. EPA does not recommend septic tank additives: it states they are not necessary for a septic system to function properly when treating domestic wastewater, and that they can be ineffective or even harm system operation and the environment.[3][4]
Repair or replace the system
Angi puts a new tank alone at $3,000 to $9,500, and full replacement varies widely by system type, from $3,000 to $8,000 for a conventional anaerobic system up to $10,000 to $20,000 for aerobic or mound systems.[1] HomeGuide puts drain or leach field replacement at $3,000 to $15,000, with rejuvenation at $1,000 to $5,000.[3] HomeAdvisor cautions that improper DIY repairs can lead to leach field failure costing up to $20,000 to fix.[2]
DIY or hire a pro
Both sibling sources say septic repair is licensed-pro work: it involves toxic sewer gases and raw sewage, and mistakes can cause leach field failure.[1][2] The homeowner’s role is routine inspection and pumping on schedule; the EPA likewise says operational issues should be assessed by a septic system professional or local regulator.[4]
Related cost guides
See our guides to septic tank cost, septic tank pumping cost, sewer line repair cost, drain cleaning cost and plumber cost.
Sources
- Angi – How Much Does Septic Tank Repair Cost? (updated Sep 15, 2026)
- HomeAdvisor – How Much Does Septic Tank Repair Cost? (updated Jun 19, 2026)
- HomeGuide – How Much Does Septic Tank System Repair Cost? (2026)
- U.S. EPA – Frequent Questions on Septic Systems (additive guidance, cited where noted)