I am in a state of shock and amazement that you guy's take work on at such low prices. I have been cleaning windows for 14 years and can only say this. If your service is good, your reliable, INSURED, frindly and helpful and wipe the window sills down as part of your service people will pay you what that service is worth. When I first started I was worried about charging too much or too little, then I decided to bite the bullet and do what was good for me and change my business around. My minimum charge is £10 no matter what your property is, I explain to customers that once the VAT @17.5% is out, then the Tax Man 10 - 15% has his share, then the wages for the guy that helps me, then the cost of petrol and equipment is out this leaves the business about £4. This guarentees that I will be here next week, next month, next year in fact longer than they will probably live in their house. You pay for what you get in this world (excuse the pun) if they want someone who charges £6, has no insurance, is not registered or legal then I wish them well and leave them a card for when they change their mind. I did this 7 years ago and have never looked back. Think of it this way, you can only clean so many houses in a day so your in charge of what you can earn. Would you rather have 30 houses at £10 each and room for more or 60 houses at £5 each busting ya back???
Good luck to you all peoples and enjoy your day ahead