How much cash should a car wash keep?

A car wash gets paid on the spot, by card or membership. It waits on no one. The pressure comes from the other side. Equipment loans, utilities and chemicals are large and steady, and the weather decides how many cars come through.

Payroll per run, all-in $ How often you run payroll Fixed bills per month (rent, loans, insurance, software) $ Days your customers take to pay, on average days Cash in the bank today $

Minimum to keep

Two payroll runs plus one month of fixed bills

Comfortable level

Covers costs while you wait for customers to pay, plus one month

Weeks your cash covers

If no customer paid you

The starting numbers are an example. Replace them with yours.

How cash moves in a car wash

Rain and cold weeks cut volume fast. Fixed costs stay the same.
Unlimited wash memberships smooth revenue, because they bill monthly whatever the weather.
Equipment breaks. One repair can cost more than a slow week.
Water, power and chemicals rise with volume, so a busy month also costs more to run.

Why the usual rule falls short

Two car washes each take in $70,000 a month. One gets half of that from monthly memberships. The other relies on single washes. A wet month hits the second one far harder, so it needs a bigger cushion.

How the calculator works

Result	Formula
Minimum to keep	2 × payroll per run + 1 month of fixed bills
Comfortable level	Monthly costs × (days to collect ÷ 30 + 1)
Weeks your cash covers	Cash ÷ weekly costs

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Also for car wash owners, see the car wash monthly financial report.