Septic tank service costs depend on your project and location. Check with a local pro for your specific job.
Concrete septic tank materials cost $700 to $2,000, and your price rises with larger tank size.
Your home size sets the capacity you need, and undersizing the tank causes backups and drain field strain.
You should also account for soil tests, land surveys, excavation, and permits, which run $450 to $6,300.
Hiring a local septic tank company protects your home from sewage issues and ensures installation meets local codes.
In 2026, the national average cost for a concrete septic tank is $1,300. Most homeowners pay between $700 and $2,000, with the spread driven by tank size, installation complexity, and site conditions. When budgeting, factor in leach field installation, soil tests, land surveys, excavation, and permits, which can add $450 to $6,300 to your total.
Concrete septic tank materials typically cost $700 to $2,000, though your total project can reach $6,500 once labor is included. Tank size is the primary cost driver, but permits and leach field installation also shape your final price, as the breakdown below shows.
A concrete septic tank's size is one of the biggest factors in your final project price, with costs varying significantly depending on capacity. Most local regulations require a minimum tank size of 750 gallons, so check your area's rules before choosing a size, and costs by gallon capacity are shown below.
| Tank Size in Gallons | Average Cost in 2026 |
|---|---|
| 750 | $900–$1,200 |
| 1,000 | $1,250–$1,500 |
| 1,200 | $1,500–$1,800 |
| 1,500 | $1,600–$2500 |
| 1,750 | $2,000–$3,000 |
Your home's bedroom count determines estimated wastewater output, which directly sets the right size septic tank you need. See how household size affects your total cost in the breakdown below:
| Household Size | Tank Capacity in Gallons | Average Cost in 2026 |
|---|---|---|
| 2-bedroom | 750 | $900–$1,200 |
| 3- or 4-bedroom | 1,000 | $1,250–$1,500 |
| 5- or 6-bedroom | 1,200 | $1,500–$1,800 |
| 6- or 7-bedroom | 1,500 | $1,600–$2,500 |
| 8- or 9-bedroom | 2,000 | $2,300–$3,450 |
Labor for concrete septic tank installation runs $1,600 to $4,500, representing 50% to 70% of your total project cost. Most municipalities require licensed or certified professionals to handle this work, so hiring a qualified pro is both a legal and practical necessity.
Permits are required for any septic system installation or tank replacement, and building permits cost $450 to $2,300, depending on your local regulations. A local septic tank company can help you navigate the permitting process and avoid unexpected fees or fines.
Concrete septic tank installation involves significant prep work, starting with a cost of a soil test of $690 to $2,200 to confirm your property can properly absorb wastewater, which also helps a pro recommend the right type of septic system for your soil. The cost of a land survey adds $380 to $770 to pinpoint a safe and legal installation location. Excavation is another cost to confirm with your contractor, since it may not be included in your initial quote and can run $1,500 to $6,300 separately.
Septic systems require regular maintenance, and from time to time, parts can fail and require repairs. Plus, in the event of a broken part or a failing septic tank or leach field, paying extra per month for insurance and warranties can save you money in long-term septic system costs.
Septic tanks require regular maintenance, and you can expect to spend $250 to $1,250 every three to five years for the cost of septic tank pumping. Annual septic system inspections cost $200 to $900, and these regular inspections can help catch any issues before they result in costly damages to your yard and plumbing.
Homeowners insurance may cover about 10% of the total value of the policy toward some septic system repairs or installation. However, you can pay for added protections with a home warranty plan—just double-check that the plan you choose covers septic systems. These warranties cost $30 to $60 per month.
For concrete tanks, septic tank repairs cost $700 to $5,000, depending on the type of repairs you need. Repairing a filter is a less expensive fix, ranging from around $200 to $300. Fixing a septic line is one of the more expensive repairs, costing $1,000 to $4,200.
Concrete septic tanks are extremely resistant to buoyancy, so consider concrete instead of plastic if you live in a flood-prone area.
Whether you’ve moved into a property with an existing septic system or you’re installing an entirely new concrete septic tank and leach field, there are some additional projects you may want to tackle at the same time.
Going off the grid? Consider costs for adding a water source or getting utilities on your land. Looking to boost the look of your yard after septic installation? Try some new septic landscaping ideas. Here are the costs of common add-on projects:
Landscaping cost: $1,260–$6,000
Cost to install new utilities: $6,500–$30,000
Cost to drill a well: $5,300–$9,100
Lawn leveling cost: $1,000–$3,300
Installing a new septic system or replacing a septic tank can be a costly investment for homeowners, but if you’re having trouble affording a septic system, there are some ways to reduce the costs.
Choose the right tank size: While you don’t want to go too small on a septic tank, don’t go over budget by getting an oversized tank suited for a larger household, either.
Check for incentives: There are state and federal funding programs that can help offset septic system costs. Check with the Environmental Protection Agency for your potential options.
Buy some of the materials: Septic systems need gravel for drainage, pipes, and other materials. You save money by purchasing materials independently. Compare the rates you find with the cost provided by the septic system company.
Labor accounts for most of the cost of concrete septic tank installation, so if you’re trying to save money, you might be tempted to tackle this job yourself. However, for safety and legal reasons, it’s far better to hire a local septic tank company for this project.
Installing a concrete septic tank is best left to the pros for the following reasons:
In many areas, DIY septic tank installation is against the law.
Professionals understand local septic tank installation regulations and permit requirements, which can be difficult to navigate if you aren’t familiar with them.
Concrete septic tanks weigh several tons, making them difficult (and dangerous) to move and install.
Pros already have the expensive, specialized equipment required for septic tank installation.
A septic tank is the heart of your septic system, and if you install yours incorrectly, you could end up with a soggy lawn, sewage in your home, and other issues.
Septic tank pros have insurance and warranties on their work, which will protect you if any issues arise during installation.
Pros have the skills and experience to perform the job safely and efficiently.
While we don’t recommend installing your own concrete septic tank, there are a few things you can do to prepare for a pro’s visit, including:
Remove items (like large rocks, kids’ toys, and lawn accessories) from the installation site.
Open any gates to create a clear pathway for the pros to bring in equipment and access the work area.
If needed, shower, run your washing machine, and make sure you have enough drinking water before the pros arrive (since you’ll be without water while they work).
Prepare to discuss which size septic tank is best for your home, depending on local regulations and your household size.
If your yard is difficult to access, describe the challenges to your pro and ask how they’ll get the septic tank and equipment to the work site.
Ask for an estimate of how long the project will take and how long you’ll be without running water.
Find out how the installation will affect your landscaping and how much grass you’ll need to replace afterward.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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