Why does the rental company want a deposit and a card on file for a porta potty?

Yes, a deposit and a credit card on file are standard for all portable toilet rentals, including residential ones. The deposit covers immediate costs like delivery, pickup, and a base service fee, while the card secures against additional charges that might arise. Even on a level gravel driveway with clear truck access, unexpected issues can occur: a guest or pet could damage the unit, the holding tank might need extra pumping if usage exceeds estimates, or severe weather could require repairs. Rental companies use this two-step system because homeowners, like contractors, can sometimes forget to return keys, delay pickup schedules, or have unforeseen incidents. It protects the operator from losses without burdening you with upfront full payment. For a six-week rental of a standard unit, weekly service is typical, but family size and habits might prompt extra visits, billed to the card if needed.