Buying a Car Wash
Three Formats, Three Businesses
Car washes come in formats with different economics: express tunnels (high-volume conveyor washes, often membership-driven), in-bay automatics (the machine at the gas station), and self-serve bays (coin-op wands). Express tunnels attracted a private-equity consolidation wave that repriced the whole category in sellers' heads, while in-bay and self-serve sites remain classic small operations. Know which format you are underwriting before any multiple means anything.
What Car Washes Trade For
The publisher's sold car wash listings put half of transactions between 3.2x and 6.7x SDE across 2021 to 2025, on a 5.18x median, a 4.99x average and revenue at 1.03x to 3.01x, with an $800,000 median sale price in its sector table. The publisher's headline tile prints a 4.93x average and an $857,500 median under a different label, so the tables are the figures to use. Consolidator prints on big tunnels are not comps for a two-bay automatic.
Membership Is the Multiple
The consolidation era's core lesson is that unlimited-wash memberships transform the revenue quality, because subscriptions smooth weather-driven volume into something a lender can underwrite. For smaller formats without membership programs, the analogous questions are traffic count, site visibility, and pricing power, which is to say the real estate.
It Is Mostly a Real Estate Deal
A car wash is a purpose-built site on a traffic corner, and transactions commonly include the property. That reshapes everything: the deal sizes toward real-estate numbers, underwriting weighs the dirt and improvements alongside the wash income, and the exit has a floor (the site) with an operating business on top. If the real estate is not included, scrutinize the lease the way a laundromat buyer would, since a purpose-built tunnel cannot relocate. No federal standard sets what a wash may discharge, so the binding limits are the local sewer authority's and the file to pull is municipal. Storm drain washwater is a federal illicit discharge without its own permit. Ask where the pit drains: a dry well or drain tile is an injection well.
What to Verify in Diligence
Volume first: car counts against weather patterns and seasonality, membership counts and churn if a program exists, and pricing against the corridor's competitors, including any new express tunnel under construction nearby, the classic volume-killer. Then the plant: tunnel or bay equipment age and refurbishment history (major refresh cycles run six figures), water-reclaim systems and utility rates, and environmental housekeeping such as oil-water separators. Finally labor, which is light in self-serve and automatic formats and a real management question in staffed tunnels.
Financeability Notes
Car washes with real estate fit SBA structures well, including combination and 504 approaches when the property dominates the deal, and lenders know it. Underwriting will focus on volume durability, competition risk on the corridor, and equipment condition. Membership revenue, where it exists and survives verification, reads as the closest thing the category has to recurring revenue. Model debt service on realistic car counts through a bad-weather year, not the trailing summer. The SBA lists car washes as special purpose property, which lifts the borrower contribution on a 504 to 15%, and one bought with its site may meet the coverage floor on projections within two years of funding when the appraisal fully secures the loan.
Terms in This Industry
Capture rate
The share of vehicles passing the site that actually turn in and buy a wash.
Express tunnel
A conveyor wash the customer stays in the car for, the format consolidators favor on throughput.
Unlimited wash membership
A monthly subscription to wash as often as you like, which reshaped how car washes are valued.
Water reclaim
Equipment that recovers and reuses wash water, cutting the sewer bill and often required.
Significant industrial user
The discharge tier that decides whether the sewer authority writes you a permit.
Premises isolation
The backflow assembly on a wash's line, required because the premises are a cross-connection hazard.
Mandatory fee inclusion
The rule that a posted number must already contain every fee a customer has to pay.
Wage bond registration
California's yearly registration for a hand or staffed car wash, which a $150,000 wage bond must back.
What the Data Says
BizBuySell's car wash tables put the sold average earnings multiple at 4.99x and revenue at 2.01x, on an $800,000 median sale price and $191,451 median owner earnings. The page says most sales include convenience stores, gas pumps or merchandise and calls real estate a common inclusion, which is most of what those multiples hold.
Source: BizBuySell, car wash valuation benchmarks (2021-2025 sold listings)
Car wash sales on the same marketplace fell from a $1,000,000 median in 2021 to $700,000 in 2025, about 20 percent below 2024 as smaller washes sold, and sold earnings multiples run from 3.20x at the lower quartile to 6.70x at the upper.
Source: BizBuySell car wash benchmarks (2021-2025 sold listings)
The same page ties the multiple to size: a wash over $1 million of sales may sell for 6x or higher, one under $300k trades around 3 to 3.5 times, and washes that own their real estate trade higher than those that lease.
Source: BizBuySell car wash valuation benchmarks (2021-2025 sold listings)
Enter earnings to apply this industry's cited band.
A sanity check against asking prices, not a valuation.
Where they are, from Census County Business Patterns: California (1,174), Texas (1,040) and Florida (683) hold the most buyable ones. Each state guide ranks its own counties, which is the number that decides a search: nobody buys a state, they buy inside a drive.
Lender context, from the SBA loan-level file: Celtic Bank Corporation (23), Metro City Bank (19), The Huntington National Bank (14) wrote the most of this industry's 280 acquisition approvals. A bank that knows the trade says yes faster; the ranking for every industry is on Most Active Lenders by Industry.
Holding a live deal in this industry? Underwrite it with this industry preselected, its cited band and charge-off rate loaded.
Compare bands across industries in the cited multiple bands by industry.
Who Else Is Buying in This Industry
- Access Holdings · Baltimore, Maryland
Buys main-street service businesses at $5M-$20M of EBITDA into platforms: car washes under Spotless Brands, pet daycare and boarding under WagWay Group, plus funeral homes and pet aftercare.
- Pete's Express Car Wash · 2025 · Six express car-wash sites in Greater Philadelphia, folded into the Flagship Carwash brand under Spotless Brands.
- Express Wash Concepts · Columbus, Ohio
Midwest express car wash platform running four regional brands, which grows by buying single sites and small local chains and rebranding them into whichever of its four names fits the market.
- Montgomery Road Zips · 2025 · A single express conveyor site in Cincinnati, rebranded to Flying Ace.
- 3 more confirmed on the firm's profile
- Whistle Express Car Wash · Charlotte, North Carolina
Express wash operator that grows by buying existing chains outright, from five-site regional groups up to a platform of several hundred locations.
- Take 5 Car Wash (closing) · 2025 · The Driven Brands wash chain's purchase closed, the combined company at 530 locations across twenty-three states.
- 4 more confirmed on the firm's profile
- Mammoth Holdings · Dallas, Texas
A private-equity-backed express car wash platform of more than 150 conveyor washes in seventeen states, growing by buying independent and small-chain washes and rebranding them under its banners.
- Gloss Car Wash · 2024 · An express conveyor car wash in Lilburn, Georgia that grew Mammoth's Atlanta-area cluster to seventeen sites.
- 4 more confirmed on the firm's profile
Buyers is the shelf these come from, ordered by who closed something most recently.
How Big This Market Is
There are about 19,807 businesses in this industry. 9,387 of them (47%) have 5 to 99 employees: the band big enough to have something to sell, small enough to finance. Most of the rest are owner-operators with a job rather than a business to hand over.
Census County Business Patterns (2023). How often they change hands is in Market Depth.
How Often These Loans Go Bad
Of the 116 SBA acquisition loans in this industry old enough for most failures to have shown up, 1 were charged off: a rate of 0.86%. Across every industry we can measure, the pooled rate is 4.20%, so this one runs cooler than the average acquisition.
Computed from SBA loan-level data on a seasoned cohort. It counts loans already written off, so read it as a floor and as a ranking. Every industry's rate.
The Numbers That Run This Business
- Cars per day against weather
- Membership count and churn (if program exists)
- Revenue per car
- Chemical and utility cost per car
- Downtime on tunnel or bay equipment