Starting or buying a car wash

In a 2026 International Carwash Association interview, equipment-industry executive Keith Lutz described self-service as generally needing less capital and fewer employees than an express tunnel in the US market.¹

A side-hustle proposal needs a coverage plan before it needs an earnings promise.

Road traffic is an opportunity to be noticed, not proof of purchases. Look at the journey from the driver’s seat. Can customers spot the entrance, enter from their usual direction, wait without obstructing circulation and leave easily?

A queue can suggest demand. It can also reveal slow service or a bottleneck you would inherit.

Build the capacity case around the whole visit: finding the entrance, entering, queuing, paying, loading, washing, drying and exiting. Any stage can limit delivery. For a staffed service, available people and working space matter too. A machine’s technical rate does not establish how often customers will arrive or whether the site can process them continuously.

Establish where each drain goes. The US Environmental Protection Agency identifies detergents, metals and hydrocarbons among possible washwater pollutants.³

Check each discharge route with the appropriate authority:

• Sanitary sewer: the sewer or trade-waste authority.
• Stormwater system: the stormwater authority.
• Land or receiving waters: the environmental regulator.

The responsible authority and requirements depend on the site address.

Before signing an unconditional lease or ordering equipment:

Also ask the water supplier about:

Recycling does not guarantee permission to operate or an exemption from restrictions.

A pay-per-wash customer generates a sale when they buy a wash. A member pays for access under a subscription contract, then visits according to their own routine. Those visits consume water, chemicals, energy and capacity even when no new payment is collected at the gate.

Keep these schedules separate:

Membership receipts and retail sales make up revenue. Member and retail visits together drive wash activity, activity-related costs and queue load. More member use can increase costs and peak queues without increasing that month’s membership receipts. Fewer visits can reduce those costs, but low use may not persist.

Rinsed’s US report covering more than 2,000 washes reported average member use of 2.3 washes per month in Q1 2024.¹⁰ This is a dated platform aggregate with limited public detail about its format mix.

Also test substitution. An existing retail customer who subscribes brings membership revenue but may stop making their previous individual purchases. Counting the whole fee as new revenue while retaining that customer’s old retail spending overstates the opportunity.

In Rinsed’s US Q2 2026 aggregation, reported same-store membership revenue rose 10.4% year over year while retail revenue fell 3.9%.¹¹ The figures support separate tracking, but do not establish how much of the retail decline was caused by conversion to memberships.

Contribution is what remains before standing costs

Contribution is revenue less the costs of delivering that activity. For a mixed wash, combine membership and retail revenue, then deduct the visit-linked costs of all washes performed—not just retail washes.

Water, chemicals and some energy use may move with activity. Labour and maintenance need more care. Some costs continue during quiet periods; others change when an extra shift, call-out or service task becomes necessary.¹² Separate those behaviours rather than calling every utility or wage bill “variable”.

A wash can cover routine trading costs and still leave its owner short of cash. It can meet loan payments and still fail to reward the original investment. Test each threshold separately; passing one does not establish the next.

Keep depreciation separate from equipment purchases. Depreciation is an accounting charge; buying or replacing a machine uses cash.¹³ Loan principal repayment is a financing cash outflow, not an operating expense.¹⁴ Ask a local accountant to align the profit and cash views with the entity’s reporting framework and avoid double-counting investment or repayments.

Water use can change materially with equipment, maintenance and recycling. These figures show that sensitivity, not a cross-country ranking or a cost forecast.

The Canadian guidance comes from British Columbia’s Capital Regional District. The US study has a limited regional sample. Their definitions, formats and conditions differ, and neither gives a current utility bill for your site.

An Australian government case study describes an equipment retrofit at Mr Magic Car Wash in Roma, Queensland, in 2014.¹⁷ Its intended energy savings were a target, not a measured result, and the previous operator’s energy accounts were unavailable.

In New Zealand, supplier Wash Design lists monthly, three-monthly and six-monthly service agreements.¹⁸ These are offered intervals, not maintenance-cost estimates or evidence that the intervals suit every machine.

A seller’s headline earnings can hide unpaid owner work, deferred repairs or commitments that will change after takeover. Have an accountant reconcile the claimed results with the underlying records, not just the sales brochure.

New Zealand’s official acquisition guidance recommends checking accounts, ownership and contracts and obtaining professional asset assessments.¹⁹ For the installed wash, commission an independent equipment specialist—not just a demonstration wash.

The assessment should cover the actual system, its service and fault history, parts availability, warranties and likely replacement work. The International Carwash Association describes pumps, controls, chemical delivery, payment equipment and, in relevant formats, conveyors working in sequence.²⁰ A machine list alone does not establish their condition together.

If one is missing, the next step is investigation, not a larger equipment order.