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This calculator vs. a flat Saturday-special price
“$150 a unit for Saturday” prices the event day. It does not see the Friday drop, the Sunday pickup, the extra pump-out, or the second round trip — the four lines that turn a job that looked like last week's into one that loses money.
What a flat Saturday-special price is
A flat Saturday-special price is a single per-unit dollar figure, quoted for the event day and multiplied by however many units the promoter says they need. It is fast to say on the phone, and it is the number a promoter holding one yard's quote will read back to the next yard and ask them to match.
The figure was set once, usually against a same-day drop-and-pickup job with no extra pump-out and a short haul, and then reused for every booking under the same headcount — whether the actual job is that same-day booking or a full weekend with the boxes sitting three days, an extra service visit, and a delivery yard forty miles out instead of five.
What this calculator is
This page keeps no account and sends nothing to a server. You enter your unit mix and their per-day rent and per-visit service price, the days the boxes actually sit on site, service (pump-out) visits, delivery and pickup fees, one-way mileage and your rate per mile, an optional weekend haul premium, consumables per unit, overhead, and target margin. It prices the rental days, the pump-outs, and the full two-round-trip haul as their own lines and returns the event price, the price per unit-day, and the walk-away price below which the job loses money — for this event's own days and trips, not a per-unit number set from a different booking.
| What a flat Saturday-special price does | What this calculator does instead |
|---|---|
| Charges the same per-unit figure whether the boxes sit for the event day alone or for a full Friday-through-Sunday weekend. | Prices rent per unit for every day on site, so a three-day sit costs three times what a one-day sit costs — on this booking, not the headcount average. |
| Has no separate line for an extra pump-out during a multi-day event. | Prices service visits per unit, per visit, so an added pump-out is priced when it is booked, not absorbed into a flat number that never planned for it. |
| Prices one truck trip, when a delivery and a pickup are two — four times the one-way mileage, not one. | Prices delivery, pickup, and mileage as a full round-trip haul, plus an optional weekend premium on that haul. |
| Gives the yard a number to quote against a promoter's ask, not a number to check that ask against. | Reports the walk-away price and flags a proposed price that falls below break-even, so a shopped number can be scored before you agree to match it. |
| Has no view of the fleet a headcount actually needs. | This calculator's own fleet-size estimate from attendance, event length, and alcohol/food service. |
Same five units, one flat price
Using this calculator's own shipped fleet — four standard portable restrooms and one wheelchair-accessible unit, $85 delivery, $85 pickup, 18 miles one way at $3.50 a mile, $8 per unit in consumables, 12% overhead, and a 25% target margin:
A genuine weekend booking — Friday drop through Sunday pickup, three days on site, one extra mid-weekend pump-out — costs $1,061.76 to run before a dollar of profit, and this calculator prices it at $1,415.68.
A flat Saturday-special quote of $150 a unit for the same five units comes to $750: $311.76 below the job's own break-even cost — before counting the $665.68 it falls short of this calculator's own price at the same 25% target margin. Same five units, same weekend, one flat number that loses money the moment the extra day, the extra pump-out, and the second round trip are counted.
Common questions
Why does a flat Saturday-special price get an event rental wrong?
Because a flat per-unit Saturday price prices the event day, not the rental. A promoter shopping yards for "$150 a unit for Saturday" is asking every yard to quote the same number for a job that is not the same job everywhere: one yard drops Friday and picks up Monday, another drops and picks up same-day; one event needs an extra mid-weekend pump-out, another does not; one site is five miles from the yard, another is forty. The unit count is the only variable the flat price sees, and it is not the only variable the job has.
What does a flat Saturday-special price usually leave out entirely?
The days on site beyond the event itself, the pump-out visits, and one of the two round trips. Rent is normally charged for every day a unit sits -- Friday drop through Sunday pickup is three days, not one -- but a flat per-unit number is set once against a typical single-day job and then quoted for every booking. It has no separate line for an extra pump-out, and it prices one truck trip when a delivery and a pickup are two round trips: four times the one-way mileage, not one.
How big is the pricing gap in practice?
On this calculator's own shipped fleet -- four standard units and one wheelchair-accessible unit, $85 delivery, $85 pickup, 18 miles one way at $3.50/mile, $8/unit consumables, 12% overhead, 25% target margin -- a genuine Friday-through-Sunday weekend booking with one extra pump-out costs $1,061.76 to run and this calculator prices it at $1,415.68. A flat Saturday-special quote of $150 a unit for the same five units comes to $750: $311.76 below the job's own break-even cost, before counting the $665.68 it falls short of this calculator's own price at the same 25% target margin. Same five units, same weekend, one number that loses money the moment the extra day, the extra pump-out, and the second round trip are counted.
Is a flat Saturday-special price ever the right way to quote?
For a same-day drop-and-pickup job with no extra pump-out and a short haul -- the case the flat number was probably set from -- it can land close. The risk is the multi-day weekend booking under the identical per-unit ask, because the flat price does not know how many days the boxes will actually sit, how many pump-outs the site will need, or how far the yard is driving until the booking details are in, and by then the flat number has often already been quoted.
Does this calculator know my local rental or pump-out rates?
No. It has no price book and no data on your market's going rate. It takes your own per-unit rent and service price, the days the boxes actually sit, pump-out visits, delivery and pickup fees, mileage, and your target margin, and turns that into a price for this event -- the arithmetic a flat Saturday-special number skips, not a market survey.
Open the Porta Potty Event Quote Calculator to price your own event, or read how many porta potties for 200 people?