Once customers have decided to use you there is never a problem with the deposit. It shows commitment. We charge upfront for all Materials, Travel, Fuel , Accommodation and Expenses. Invariably a Professional Stone Cleaning / Restoration Job involves around 40% of the total cost in the aforesaid!
That said I don't see and have never had a problem even if you book in a £500 Pressure washing job why should they mind committing a deposit to you? After all by the time it comes to ask for the deposit I have already sold us as a company, made friends with them, raised a contract, got them to sign it, booked the time off in the diary for the work and ordered what I need for the job. This proves I am committed, the deposit proves they are in my mind!!!