[Address and estimate number if there is one]
On [date] you [describe work] for me.
You will remember that I asked how much the work would cost and you gave me an estimate of [amount].
I was shocked when yesterday I was told the charge would be [amount]. This was almost [$ more than] the estimate you gave me.
I pointed out the large difference but you said I had to pay or else you would hold my [item if it is the repair of a product].
Under duress I paid, but I have now taken advice from [name] and am told that in law a final price should be close to the estimate – certainly no more than 20% above.
I ask that you refund [amount] within 5 working days. As you will see, I have allowed what I consider to be a reasonable margin for unexpected costs you may have failed to include in your estimate.
I look forward to receiving your payment.
Point of Law
Estimates are approximate prices. Nevertheless they must be close to the mark. Tradespeople and professionals are experts in their field of work and they should give figures that are close to the true cost of jobs. In our opinion, it’s worth challenging an account that is more than 20% above an estimate. Always ask to be contacted if unforeseen problems crop up during a job.