Illustration for Self-Serve Car Wash Bay Math

The posted prices above are for time, not for individual cycles, so the question isn’t which setting costs more. It’s which ones earn their seconds.

What bays charge

Wash or operator Start price and time About per minute
Hoffman Car Wash, Kingston, NY (cash) $1 for 1 minute; $10 for 13:20; $20 for 29:00 $1.00 / $0.75 / $0.69
Hoffman Car Wash (card) $5 to start $0.75
Palm Springs Car Wash, Bradford, Ontario C$4 for 4 minutes; C$1 per extra minute C$1.00
Operator post, north central Mississippi $2 for 4 minutes $0.50
Operator post, Mounds View, MN $2 for 3:28 (card: $4.32 for 7 minutes; operator says he charges 8% card fees) About $0.58–$0.62
Operator post, Puget Sound, WA $2.75 for 3.5 minutes About $0.79
Operator post, three Minneapolis washes $5 for 4 minutes $1.25

Operator posts come from an industry forum thread in February 2024, so some prices have likely risen since. Always read the board in your bay.

Pay in one go, if the board rewards it

At the Kingston wash, single dollars buy a minute each. A $10 purchase buys 13 minutes 20 seconds, and $20 buys 29 minutes. Feeding dollars as you go costs about a third more per minute than one $10 purchase there.

Card payment can work the other way. One Minnesota operator says he charges 8% card fees. If your bay prices cards higher, cash may be cheaper.

A timed order for one run

A chemical supplier’s self-serve guide lays out the order: tire cleaner, pre-soak, high-pressure soap, foaming brush soap, high-pressure wax, then a ceramic finish. Here’s a version built around the clock:

  1. Tire cleaner, about 1 minute. Spray all four wheels first so it works while you do the rest.
  2. Pre-soak, about 1 to 1.5 minutes. Low pressure, whole car. A car wash trade magazine says a typical dwell when you apply different products is 10 to 15 seconds, so you don’t need to wait long.
  3. High-pressure soap, 2 to 3 minutes. Top down.
  4. High-pressure rinse, 2 to 3 minutes. Top down, then the wheel wells and lower panels.
  5. Spot-free rinse, about 1 minute, if your bay has it.

That’s about 8 to 10 minutes. These timings are our own estimate, not measured at a specific bay. At $0.75 a minute, it’s $6 to $7.50.

The same trade magazine notes that too much dwell lets products dry on the surface. On a hot day, work one side at a time. Our guide to washing a dark car in desert heat has more on that.

Cycles to skip when the clock is short

  • Wax, ceramic or foam protectant. They add shine and beading, not cleaning. Use them only with time left over.
  • Tire shine. Cosmetic. Skip it on a budget.
  • The foam brush on paint. One wash describes its brush as being for hard-to-reach areas. If you use it, rinse it with the wand first.

Where the board discounts bigger purchases, as in the Kingston example, one longer purchase beats several short ones.

When a bay is the right call

Bays work well when you have no hose at home or in winter. See washing in winter with the outdoor spigot off. If you wash often, an unlimited tunnel plan may cost less. Our guide to car wash membership tiers does that math. For spots after a bay wash at home, see spot-free rinse at home.

How we research our articles: methodology.

Sources

Based on 5 sources · How we price