The Wash You Meant to Take

You are selling non-use

Start with the thing that is actually being sold. It is not a wash. A wash is what the plan lets a member take. What the plan sells is the flat monthly right to wash, and the economics of that right depend on two human facts that have nothing to do with soap.

The first is that people forecast themselves wrong at the moment of signing. They picture the version of themselves who washes every Saturday, and they price the plan against that person. The gym literature measured this directly. Members who could see a pay-per-visit option chose a monthly contract and then attended so rarely that they paid over seventy percent more than per-visit pricing would have cost — roughly seventeen dollars a visit against a ten-dollar pass sitting right there. The person they were buying for goes four times a month. The person who showed up went closer to once a week at the start, and drifted down from there.

The second fact is that people cancel later than they quit. The gap between a member's last visit and the day the charge finally stops is not zero, and it is not a week. In the same body of work it ran about two and a half months, and it costs the member around a hundred and ninety dollars in payments for a service they had already stopped using. Multiply that across a base and it stops being a quirk. It becomes a standing pool of revenue from people who have functionally left and have not done the paperwork.

A quick vocabulary note, because the rest of this leans on it. When a service business talks about contribution margin, it means the money left from a sale after the costs that actually rise with that one sale — before rent and salaries and the fixed overhead that would exist anyway. For a car wash, the costs that rise with one more wash are water, chemical, a little electricity, a little wear. Call that a dollar-fifty. That number is the hinge of everything below, so treat it as our estimate rather than a disclosed figure, and check it against your own bills before you trust it.

The bet, stated plainly

It bets that the average member will pay for more washing than he takes, and will keep paying after he stops, by a wide enough margin to cover the cost of the members who wash constantly and the cost of running the site.

Notice what the bet does not require. It does not require that most members love you. It does not require heavy use. In fact heavy use, past a point, is the enemy of the bet on the one axis that matters. The bet requires forecasting error at the front and slow cancellation at the back, and a cost to serve low enough that the members who do wash a lot cannot sink you.

That last clause is the whole reason this works for a car wash and fails for a massage studio. Hold it.

The model, built from the bottom

Take one member for one month. Call the plan price twenty-five dollars, close to the entry tier at the chain we are examining. Give a wash a marginal cost of a dollar-fifty. Now walk the member across how often he shows up.

So where does the heavy user actually cost you? In two places the cash table does not show. The first is capacity, and it only bites at the peak. Most of the week a tunnel sits well under its throughput, so one more member wash costs nothing but the dollar-fifty. But on the first clear Saturday after a week of rain, the line is real and the tunnel is the constraint. Every member you wave through at their marginal dollar-fifty is a slot you did not sell to a stranger at fifteen. That is the one window where a devoted member is genuinely expensive, and it is a small number of hours a year.

The second cost of the heavy user is not on that chart at all. It is that he is the member most likely to notice. He uses the plan, so he sees the plan, so when the price moves or the machine breaks twice he is the one who cancels the same afternoon. The quiet member is not watching. His inertia is the asset. The heavy member's attention is the risk.

Now add the quiet members back to the table. A member who has stopped washing but not cancelled sits at zero washes. He pays twenty-five and costs nothing, month after month. Say two in ten of your paying members are in that state at any given time. Then a fifth of your revenue is arriving at full margin from people you are no longer serving. That is not a rounding error. In a low-cost business it is often the gap between a thin operation and a good one.

What breaks it

Every model has one input that, if you are wrong about it, ends the recommendation. Here it is not the price and not the cost. It is the average number of visits per active member, because that single number decides whether you are running an intention business or a genuine all-you-can-use buffet.

If members actually washed at the rate they imagine — four or more times a month — two things happen at once. The peak stops being one Saturday and becomes most of them, so the capacity cost stops being a rounding error. And the value exchange becomes real rather than forecast, which sounds nice until you remember you priced the plan for people who would not show up. A plan priced for two washes and used for six is a plan losing the argument.

So the number to know, before you scale a membership or buy one, is visits per active member per month. You can pull it from your own point of sale in an afternoon: total visits in a period, divided by the count of members who visited at least once. If it sits near or below your break-even washes, the intention model is intact and the quiet members are carrying it. If it runs well above, you are closer to a buffet, and buffets have to be priced and capped like buffets.

The marginal cost is the second exposure. We used a dollar-fifty. If your true cost to serve one visit is five dollars, the contribution table compresses hard and the heavy user starts to matter on cash, not just at the peak. The third exposure is the float itself — the pool of quiet payers. We have leaned on the gym evidence for how deep and how slow that pool is, because the car-wash chain does not publish it. That transfer is a judgment, not a measurement. A careful buyer would want your real cohort curves before paying for it.

Where it works, and where it inverts

The reason this pattern travels to some businesses and poisons others is the marginal cost line from the model. Sort businesses by what one more visit costs to serve, and the plan sorts itself.

The through-line: a flat unlimited price is a bet that people will pay for capacity they do not consume. That bet wins when the capacity is cheap to hold and loses when every unit of it consumed costs you real money. A car wash holds capacity almost for free. A massage therapist's hour is gone the moment it is used. Same plan, opposite outcome, and the only thing that changed is the cost of one visit.

What a buyer sees

If you buy small businesses, or lend against them, a membership base is the asset you are actually buying. Recurring revenue is worth more than one-time revenue, and everyone in the market knows it, so a business with a big membership base sells at a higher multiple of its earnings. The catch: not all recurring revenue is the same quality. A base of steady low-frequency members who renew quietly is gold. A base padded with members who have already stopped using and have not yet cancelled looks identical on the dashboard and is worth much less — because a single event can wake all of them at once.

Put a number on it. Two washes, each with a thousand members paying twenty-five a month. One base washes twice a month and renews for years. The other has two hundred and fifty members who have not come since winter and will cancel the day they notice. On the dashboard both read a thousand members and twenty-five thousand dollars a month. To a buyer they are not the same business. He pays full price for the first and a haircut for the second, and the gap stays invisible until someone sorts the list by last visit.

So the buyer who knows this does not pay for your member count. He pays for your cohort retention — the members who joined in one month, and what fraction still pay twelve and twenty-four months later. He pays for visits per active member. And he pays for how you handle cancellation. If your growth came from making the plan easy to buy and quietly hard to leave, he will find it, and he will discount for it.

There is a live version of this in the public markets that has nothing to do with car washes. Retailers who sell prepaid cards book a slice of revenue from money that is loaded and never spent. When that slice grew large enough at one large coffee chain, a labor group asked the securities regulator to look harder at how it was counted. The point for a four-truck operator is not the accounting. It is that money collected and not consumed is a real and countable thing, it can be a large share of your profit, and the more of your profit it is, the more a serious buyer will want to know how durable it is before he pays for it.

The chain in this issue sits on the healthy side of that line, as far as an outsider can tell. Its plan is seventy-nine percent of wash sales, it added members last year rather than shed them, and its cost to serve a wash is genuinely low. But an outsider cannot see visits per member, and neither can most owners, until they export the list and add the column the Nashville owner added.

The move the model hands you

If you own one of these plans, the model points at four things, and they are the four weeks of the Play. Find the quiet base and put a dollar figure on it. Stop spending to shrink it. Bank part of it as cash. Aim your retention effort at the members who actually leave.

The one with a live trade-off is the cash move. Selling an annual plan up front pulls the float forward and locks a member past the point where he would have drifted off. It hands you a year of money to grow on without a bank. But the same gym evidence that measured the float found monthly auto-renew contracts persisting longer than annual ones, because a yearly renewal is a loud decision and a monthly charge is a quiet one nobody reopens. So annual prepay buys cash and a locked term at the cost of some long-run stickiness. Use it when the cash matters more, and keep quiet monthly auto-renew as the default when it does not.

What the case proves, and what it does not

It proves that a flat recurring plan on a low-cost service makes its money on the gap between paying and using, and that the gap is largest exactly where owners are least likely to look — in the members who have gone quiet. It proves the heavy user is not the villain the intuition expects, because cheap capacity forgives him on cash. And it proves the reflex to chase engagement is backward for this kind of plan, because the engaged member is the one who watches and leaves, and the quiet member is the one who pays and forgets.

It does not prove that every membership is a breakage machine. The same plan inverts the moment a visit costs real money. It does not prove the quiet members will stay quiet forever — the honest risk is precisely that they will not, all at once, on the day something wakes them. And it does not prove our specific numbers. The prices and the company figures are real. The visits per member, the marginal cost, and the depth of the quiet pool are modeled, transferred from the one industry where somebody measured them.

Two explanations we could not fully kill, and honesty says we name them. One is that some of what looks like inertia is genuine value: frictionless entry makes people wash a little more than they otherwise would, and some quiet members are simply between seasons and will be back. The other is boring and probably true — that the plan works first and foremost because a wash costs almost nothing, and every other subtlety is a second-order effect on top of that one cheap fact. We think all three operate at once, and the reason to hold all three is that any one of them alone would lead an owner to the wrong move.

What is modeled and what is known

Known, from the company's 2025 results: about 2.3 million members, 548 locations, the plan at seventy-nine percent of wash sales, revenue of $1,051.7 million, net income of $103.1 million. Known, from published pricing: fifteen dollars a single wash, an entry plan near twenty-five dollars a month, a break-even for the member at about one and two-thirds washes.

Modeled, and flagged as such wherever it appears: a marginal cost near a dollar-fifty a wash, an average of roughly two washes a month per active member, and the depth and slowness of the quiet paying pool — all carried over from the gym evidence rather than measured at the wash. Any of the three could be wrong for a given business, and the Play is built so that the first thing you do is replace our estimates with your own.

Axiom Research · The Operator's Brief · No. 04 · The Workup