Mobile Car Wash Subscription Calculator

Getting an answer takes five quick steps. The tool prices one monthly plan at a time, so run it once per plan if you sell more than one tier.

1. Type your monthly plan price, which is what each subscriber pays every month.
2. Type how many subscribers pay for the plan each month.
3. Type the average washes each subscriber actually uses in a month, not the maximum the plan allows.
4. Type your cost per wash and your fixed monthly costs.
5. Press Calculate, or press Enter. Monthly profit appears first and large, with revenue, costs, profit per subscriber, break-even subscribers and the step-by-step math below. Press Reset to clear the form and start over.

Five formulas price the whole plan. Each one uses only the numbers you typed.

Monthly revenue = Subscribers × Plan price. This is the money members pay you each month before any cost is taken out.

Monthly variable cost = Subscribers × Washes × Cost per wash. Every wash costs you chemicals, water, fuel, travel and labor, so this line grows with every wash your members take.

Monthly total cost = Fixed monthly costs + Monthly variable cost. Fixed costs are the bills that stay the same whether members wash or not, such as insurance, software, vehicle payments and marketing.

Monthly profit = Monthly revenue - Monthly total cost. A positive number means the plan makes money. A negative number means it loses money at the current price and subscriber count.

Profit per subscriber = Plan price - (Washes × Cost per wash). This is the margin one member leaves each month after the cost of their washes. Break-even subscribers = Fixed monthly costs / Profit per subscriber, rounded up to a whole person. Below that count the plan loses money, and above it the plan makes money.

You sell a $45 monthly plan to 150 subscribers. Each subscriber washes 3 times a month on average, your cost per wash is $6, and your fixed monthly costs are $1,500. Here is exactly what the calculator does.

1. Monthly revenue = 150 subscribers × $45.00 = $6,750.00.
2. Monthly variable cost = 150 subscribers × 3 washes × $6.00 = $2,700.00.
3. Monthly total cost = $1,500.00 + $2,700.00 = $4,200.00.
4. Monthly profit = $6,750.00 - $4,200.00 = $2,550.00.
5. Profit per subscriber = $45.00 - (3 × $6.00) = $27.00. Break-even subscribers = $1,500.00 / $27.00 = 55.56, rounded up to 56 subscribers.

As a check, 56 subscribers bring in $2,520.00 and cost $2,508.00 in total, leaving a $12.00 profit. With 55 subscribers the plan loses $15.00, so 56 is the smallest count that breaks even.

Wash frequency is the number that decides whether a plan makes money, because every extra wash costs you money while the plan price stays fixed. The table below keeps the worked example the same and changes only the washes per subscriber.

At 6 washes a month the same plan loses money, even though nothing else changed. That is why the average matters more than the maximum. Industry data puts the average unlimited member at about 2.6 washes a month, so price the plan for 3 washes and test what happens at 4 and 5 before you launch.

Mobile washing carries costs a tunnel wash never sees. You drive to the customer, so fuel and travel time sit inside every wash, and one worker washes one car at a time, so labor is a real cost per wash instead of a fixed cost spread over hundreds of cars. Industry reports put the variable cost of one tunnel wash at about $2 to $5, while mobile operators commonly report higher costs because of that labor and travel. Count chemicals, water, fuel, travel and labor in your cost per wash, or the calculator will overstate your profit.

The price gap shows the same split. The average unlimited tunnel plan sits near $25 a month, while mobile operators commonly charge $89 to $149 a month for unlimited exterior plans, because the service comes to the driveway and takes far more labor per car. Do not copy a tunnel price for a mobile plan. Work out your own cost per wash first, then set the price so profit per subscriber stays healthy at the wash frequency members really use.

Pricing from the maximum washes is the most common mistake. A plan that allows 8 washes a month does not mean members wash 8 times, and pricing for 8 washes makes the plan look expensive while pricing for 1 wash makes it look cheap. Use the average your members really use, then test the plan at one wash above that average.

Forgetting fixed costs is the second mistake. Profit per subscriber looks healthy on its own, but the plan still loses money until enough subscribers cover insurance, software, vehicle payments and marketing. Run the break-even count first, and only call a price good when your real subscriber count sits above it. A slow month can turn a small gap into a loss, so check the result with our break-even calculator and keep the total inside your wider plan with our budget calculator.

Leaving out card fees and heavy users is the third mistake. Card fees take a small share of every payment, and a few members who wash daily cost far more than the average. If your cost per wash is honest and your average is real, the calculator already shows the effect of heavy users in the average. Recheck the numbers after two or three months with real data, and if the average has risen, raise the price or cap the washes. For a single job price, see our car detailing price calculator.

This calculator gives an estimate for planning and is for informational purposes only, not financial advice. Actual revenue, costs and profit depend on your prices, your subscribers, how often they wash and your local costs. See our disclaimer.