Porta Potty Rental Cost Calculator

About $150 per 28 days for a standard unit with weekly servicing included — roughly $120–$203 depending on your market. MR JOHN prices a standard at $139 per 4 weeks, which this model's typical sits just above. A wheelchair-accessible unit runs about $300 per month in this model.

The planning charts rental operators publish all start the same way: one unit per 50 guests for an event up to four hours, then roughly double the count for a 4–8 hour event and again for anything longer. So a 6-hour, 100-guest party computes to 4 units here — about $1,650 with deluxe flushing units and two handwash stations at our modeled rate. If you're serving alcohol, expect the operator to raise the count — there's no published multiplier, so ask what they add — and for stations, one per 100–150 guests is FixTally's planning allowance for events with food, not a published ratio; confirm the count with your operator.

OSHA 29 CFR 1926.51(c)(1), Table J-1: one toilet for 20 or fewer employees, one toilet seat and one urinal per 40 workers from 21–200 employees, and one of each per 50 workers beyond 200. That's a legal floor, not a comfortable site — the industry's own service rule is one unit per 10 workers per 40-hour week. Our calculator uses whichever number is larger, so a 40-worker crew gets 4 units, not OSHA's 1.

Because the truck roll dominates: one delivery, one pickup and a service visit have to be recovered inside a single day. A standard unit at a one-day event prices about $175 here, while the same unit on a 28-day rental is about $150 total — less than the day rate, which works out to roughly $5 per day. Operators discount because the unit sits on your site earning rent instead of riding a truck; it's the same reason a week on site prices close to a month (MR JOHN: $130/week, $139 per 4 weeks).

It's the widest number on this page: about $3,600 per 28 days in our model, or $1,800 for a single day — and our modeled month sits well under the real market: Oak City Restrooms publishes about $5,299 per month for a standard two-stall trailer (roughly $189 per day amortized), with four-stall units starting near $6,399. Stall count, HVAC, running water and attendants move the total more than any chart. Trailers also need power and a water source or a fill — ask the operator which one you're providing.

On construction sites, effectively yes — OSHA 1926.51(f) requires washing facilities where workers handle food or are exposed to harmful substances, and it expects water, soap and towels at toilet facilities; that's why this calculator puts one station on a site rental by default. For events there is no published count rule — one station per 100–150 guests is FixTally's planning allowance — and health departments increasingly require one on permitted events with food. Stations here are priced at modeled allowances — $125 per event day, $200 per 28 days — because the cost guides we checked publish no station rate at all; confirm the figure on the operator's invoice.

Once a week is the standard included service on a monthly rental — pump, clean, restock paper and deodorizer. Go to twice weekly for a crew over 20, hot-weather sites or heavy concrete/masonry work, and expect to pay roughly $25–$50 per extra visit (we model $40). A one-day event shouldn't need a mid-event service unless you're running multiple days.

Delivery outside the operator's free radius (commonly 25 miles) at a few dollars per round-trip mile, after-hours or weekend delivery — we model an $85 surcharge because no guide we could open publishes a band for it; operators quote it per job — fuel surcharges, damage waivers, and placement fees if the driver has to move the unit twice or set it on a public right-of-way that needs a permit. Ask for the total with delivery before you compare quotes: the rental rate alone isn't the price.