How this calculator works
It adds up the real cost of the job and then adds your margin:
- Hours = square feet ÷ production rate for each surface, plus setup/teardown and driving time.
- Cost = hours × (your pay + helpers + overhead per billable hour) + chemicals + vehicle miles.
- Price = cost ÷ (1 − margin), never below your minimum job price.
Dividing by (1 − margin) instead of adding a percentage means a 30% margin really is 30% of the price the client pays. Read the full method in How to price pressure washing jobs.