Getting your formal, written quotes right is a massive part of winning work. It's worth mentioning that the competitiveness of your quote is an influencing factor in the customer's buying decision, but this article focusses on the method of quoting and how to do it well to get the best value out of your quoting activities.
Detailed quotes are essential - one line item advising what the job is going to cost gives the customer no perspective to what options are included, which materials will be used, etc. Of course, you don't need to itemise the cost for each inclusion (although this is also useful), but noting the item itself is a useful communication tool. That way there is no chance of a misunderstanding over how much the work is going to cost as both sides will always be able to refer back to the quote documentation.
Quotes should be presented together with some form of collateral information about your work's quality, so consider giving the customer a copy of your Service Central Star Rating certificate and a copy of your portfolio of work too.
Well-presented, comprehensive quotes are what make you stand apart from other trades. If your quote is good then you’re more likely to look professional and so are more likely to be awarded the work and make money - which is why we're all in business at the end of the day!
In this example, the presentation of the quote was very formal - printed on good quality paper and placed neatly in a folder with four pages including a cover sheet. We point out some great aspects here.