Car wash acquisitions sit in a 4.5×–7.0× EBITDA band. Top-of-band placement is structural — membership durability, throughput quality, and chemical-yield efficiency.
of express tunnel deals presented membership counts without per-cohort retention data. Promotional-priced members inflate count without durability — the ICA Q1 Pulse confirms slowing membership growth industry-wide.
EBITDA multiple band stable at the top; site value vs. operating value confusion is the leading mispricing cause. Mister Car Wash → LGP go-private at $7.00 (29% premium) anchors the public-market exit benchmark.
of deals flagged PFAS/UST environmental risk at Phase I. Phase I now categorical for SBA-financed car wash transactions; EPA 2026 MSGP adds PFAS monitoring on top.
Ground-lease assignability is the top transferability risk. Landlord consent clauses block more closings than membership churn — confirm pre-negotiated consent before LOI.
Membership cohort data — not aggregate member count — is the single most important earnings quality document in express tunnel diligence. Promotional-priced member cohorts show 30–50% higher churn than standard-rate cohorts. A site showing 4,200 members with 45% acquired at $9.99 introductory pricing has a materially different forward revenue picture than the headline count suggests. ICA Q1 2026 Pulse confirms slowing membership growth as the industry pattern, not a site-level anomaly.
PFAS and UST environmental risk tightened as an SBA underwriting requirement in Q1 2026 — Phase I is now categorical, not discretionary, on car wash transactions. Deals treating Phase I as optional are getting caught at the commitment stage. Phase I completion runs 4–6 weeks and lands inside the LOI timeline. EPA's proposed 2026 MSGP layers PFAS monitoring onto the standing NPDES stormwater regime; site-by-site compliance cost is expected to follow.
Read the full Q1 2026 Atlas →The car wash research stack.
Atlas for the numbers. Playbook for the framework. Apply it to the deal in front of you.
Q1 2026 Industry Atlas
Trailing-12-month band, structural conditions, sources, and methodology. Quarterly. Dated. Citable. Built to be forwarded by lenders.
Underwriting Playbook
The four-pillar lens applied to car wash acquisitions. Structural failure modes. Pre-LOI verification priorities. Master spoke for the vertical.
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