Daily revenue is retail washes times their realized price, plus the revenue from memberships and other services. Count membership income separately from member visits so the same customer is not charged twice in your forecast.
Retail sales and member visits are different measures
Export retail transactions, membership collections and wash redemptions for the same period. Separate taxes collected, refunds, promotions and fleet invoices. A member may visit repeatedly while the membership is billed once; dividing all revenue by all visits can obscure what each revenue stream contributes.
For a cash-heavy operation, compare collection logs with deposits and payment-system reports. Missing collection days or mixed personal/business deposits need an explanation before daily averages are used to value the site.
| Illustrative daily calculation | Assumption | Revenue |
|---|---|---|
| Retail washes | 80 paid washes × $12 realized price | $960 |
| Membership collections | 600 paying members × $25/month ÷ 30 days | $500/day equivalent |
| Total before other services | Retail plus allocated recurring collections | $1,460/day equivalent |
Do not turn an average into a forecast
The table is a hypothetical arithmetic example, not Illinois sales data. The membership daily equivalent smooths a monthly bill; it is not necessarily cash received that day. The total excludes refunds, taxes, other revenue and all expenses. It says nothing about profitability.
Compare a full year of monthly results, open days, hours, weather closures, equipment downtime and promotions. A strong salt-season weekend should not be multiplied by every day of the year. Build a monthly schedule with the actual operating pattern.
Connect volume to operating costs
Request labor, chemical, water/sewer, energy, insurance, maintenance and occupancy records. Test extra volume against paid labor and equipment capacity. Gross sales that require additional staffing or repairs can produce less additional cash than expected.
Keep a low-demand month in the model. If fixed costs and debt service require more cash than that month produces, the acquisition needs sufficient liquidity rather than a higher assumed annual average.
Sources & evidence
- SBA: buying an existing business or franchise
Acquisition preparation and differences between independent and franchised businesses. - EPA WaterSense at Work: vehicle washes
Water-use assessment, treatment and reclamation practices; not a site savings guarantee. - SBA: 7(a) acquisition financing
Program uses and lender-led eligibility; not an approval or equity quote.
Links checked for this editorial pass on October 14, 2026. General reference material does not establish a site’s revenue, value or eligibility. Examples are illustrative where labeled.
Continue your preparation
- How to value an Illinois car wash
- Reading a car wash P&L as a buyer
- Cap rates and earnings multiples: use the right denominator
Explore an earnings and cash-flow scenario, then book a call to review your questions.
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