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, an $800,000 median sale price and revenue at 1.03x to 3.01x. Read its headline tile with care: that figure is drawn from reported listings rather than sold ones, a different population. EBITDA roundups report 4x to 7x for quality operations, self-serve at the lower end and high-volume express tunnels with membership programs at 8x and above, on a basis no publisher of sold data prints. 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: industry reporting treats membership penetration around 40% or more of revenue as the marker separating premium tunnels from everyone else, 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. Washwater to a storm drain is prohibited outright. Ask where the pit drains: one going to ground is a shallow 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 the category. 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.
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.
What the Data Says
BizBuySell's car wash benchmarks, drawn from 296 analyzed listings, run an $857,500 median sale at a 4.93x average earnings multiple and 1.92x revenue with 183 median days on market; the series bundles washes sold with gas pumps, convenience stores, and land, which is most of what those multiples hold.
Car washes analyzed on BizBuySell across 2021 through 2025, 296 reported listings, show an $857,500 median sale price with a 4.93x average earnings multiple and a 1.92x revenue multiple, lifted through the period by private equity buying washes together with their real estate; the 2025 median fell 20% as smaller washes sold.
Marketplace benchmarks show 2025 car-wash multiples firming while the median sale price fell about 20%, indicating a heavier mix of smaller washes trading; the common inclusion of real estate shapes both pricing and financing.
Enter earnings to apply this industry's cited band.
A sanity check against asking prices, not a valuation.
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 the comps, cited band, and charge-off rate pre-loaded.
Compare bands across industries in the cited multiple bands by industry.
Who Else Is Buying in This Industry
- Access Holdings · Baltimore, MD
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
- Mammoth Holdings · Dallas, Texas
A private-equity-backed express car wash platform of about 150 conveyor washes in eighteen 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.
- 2 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.
- Fins Car Wash · 2024 · Fifteen express conveyor locations across North and South Carolina.
- 1 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, and where they concentrate, is in Market Depth.
How Often These Loans Go Bad
Of the 116 SBA acquisition loans in this industry that are old enough to have failed, 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