How much does a Septic Tank Service cost to buy?

A typical Septic Tank Service sells for 2.5x to 4.5x seller's discretionary earnings. With estimated SDE of $198K, expect to pay roughly $495K to $891K before adjustments for assets, debt, growth, and local market quality.

How much does it cost to start a Septic Tank Service?

Startup costs range from $120K to $700K depending on location, equipment, and scale.

Service

Septic Tank Service

Q: What are the profit margins for a Septic Tank Service?

The average profit margin for a Septic Tank Service is around 22%. Biggest costs are vacuum trucks, labor, fuel, disposal fees, maintenance, insurance, and after-hours scheduling. Margins rise when operators layer inspections, repairs, and maintenance plans onto pumping revenue.

Mandatory pumping, emergency calls, and customers who cannot DIY it

Bottom line

Worth studying, but do not buy without strong local proof.

Septic tank service companies pump, inspect, maintain, and sometimes repair onsite wastewater systems for homes, mobile home parks, restaurants, and rural commercial properties. The boring-business strength is that failure is not optional: tanks must be pumped, backups become emergencies, and many markets have recurring compliance or inspection demand layered on top.

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Acquisition score

Fair

Avg Revenue

$900K

Profit Margin

22%

Acquisition Multiple

2.5x - 4.5x

Startup Cost

$120K - $700K

How It Works

Customers book routine pumping every few years, call for urgent backups, or hire the company for inspections tied to home sales and local regulations. Operators dispatch vacuum trucks, dispose of waste at approved sites, and upsell risers, maintenance plans, drain-field diagnostics, and repairs. The best operators build route density in rural or exurban markets where septic systems are common.

Revenue Range

Low End

$220K

Typical

$900K

High End

$3.0M

Real Acquisitions in This Category

SBA 7(a) change-of-ownership loans · NAICS 562991 · Septic Tank and Related Services

Deals tracked

13 in last 24 mo

Median loan

$545K

$245K–$1.1M p25/p75

Implied deal size

$641K

median · ~85% LTV

Charge-off rate

—

not enough resolved loans

Deal Size Distribution

<$150K

$150K–500K

$500K–1M

$1M–2M

>$2M

Deal Flow Over Time

12-month momentum

-55.6%

deal volume vs prior 12 mo

Median loan Δ

+276.8%

4 recent · 9 prior

Financing Profile

Median rate

9.50%

15% fixed · last 24 mo

Median term

120 mo

standard 10-yr

Collateralized

of loans secured

Median jobs

supported per deal

Top lenders in this space

St. Louis Bank3

The Huntington National Bank3

Columbia Bank2

United Midwest Savings Bank National Association2

BankVista2

Where deals happen

WA4

MN4

FL4

AZ4

OR4

IN3

WI3

TX3

PA3

CA2

Recent Comparable Deals

Closed	State	Loan	Implied deal	Jobs	Franchise
Mar 2026	IL	$584K	$687K	2	—
Nov 2025	AZ	$4.1M	$4.8M	8	—
Nov 2025	TX	$2.6M	$3.1M	9	—
Sep 2025	FL	$2.3M	$2.7M	7	—
Mar 2025	NJ	$1.4M	$1.7M	6	—
Mar 2025	TN	$837K	$985K	8	redbox+
Feb 2025	OH	$444K	$522K	1	—
Jan 2025	TN	$1.2M	$1.4M	4	—
Nov 2024	NC	$650K	$765K	9	—
Nov 2024	NC	$50K	$59K	9	—

Volume rank #123/544Deal-size rank #360/544Momentum rank #331p90 loan: $1.7MData as of Mar 2026

Source: SBA 7(a) FOIA dataset, filtered to acquisitions (loans where business age is "Change of Ownership"). Implied deal size assumes an 85% loan-to-purchase ratio, a common SBA change-of-ownership structure. Charge-off rate shown only when 10+ loans have resolved (paid in full or charged off). Interest rates reflect last 24 months only. Actual deal values vary with equity injections, seller financing, and working capital terms.

Pros

+Essential service with real emergency demand
+High barriers from licensing, trucks, and disposal know-how
+Recurring maintenance plus one-off high-ticket repairs
+Little threat from venture-backed competition

Cons

-Vacuum trucks and disposal compliance are expensive
-Hard physical work with on-call scheduling pressure
-Reputation damage from missed service or spills is severe

Best For

Operators who want a durable local services moat built on equipment, compliance, and low glamour

Operating Costs

Biggest costs are vacuum trucks, labor, fuel, disposal fees, maintenance, insurance, and after-hours scheduling. Margins rise when operators layer inspections, repairs, and maintenance plans onto pumping revenue.

SBA Financing Estimator

Adjust the deal — see if it cash flows after debt service

$-3298/mo

after debt service

Deal price — $1.8M

Range: $1.8M (2.5×) to $5.0M (4.5×+)

Down payment — 15% ($270K)

SBA minimum equity injection is 10% for change-of-ownership

Interest rate — 9.50%

SBA median for this category: 9.5%

Loan term — 10 years (120 mo)

SBA median for this category: 120 months

Down payment

$270K

15% equity injection

Loan amount

$1.5M

85% SBA-financed

Monthly payment

$20K/mo

$846K total interest

Monthly profit

$17K/mo

at 22% margin

Monthly cash flow after debt service

$-3298/mo

Margin does not cover debt service at these terms. Lower the deal price, increase the down payment, or extend the loan term.

Estimates only. Excludes owner compensation, capex, working capital draws, and taxes. Margin assumes average occupancy and volume. Actual SBA terms vary by lender and borrower profile.