The costs to start a pressure washing business can vary, but you’ll likely need to invest at least $7,250 to $10,000 upfront for equipment, supplies, and a vehicle.  The pressure washing machine itself will probably cost somewhere between $1,000 and $3,000, or more if you want a device with hot water capabilities. Plus, you might need to budget about $500 for business licenses and permits, plus an additional $50 or so per month for insurance.  Finally, you might want to invest some money into advertising to grow your clientele.