Most estimate templates you can download are quotation forms for products, with a table of items and a total. Service work does not fit that shape, because the thing being priced has not been fully seen yet and the price depends on what is found once the panel comes off. A service estimate that does not say so is an argument waiting to happen, and six lines are what prevent it.
The six lines that matter
Who is doing the work and their licence or registration where one applies. What is included, in plain description rather than a part number. The price, and whether it is fixed or an estimate. What is specifically excluded. How long the price stands. And what happens if the job turns out to be different once it is opened up. The last two are the ones missing from almost every free template.
Fixed price or estimate, said out loud
These are different promises and customers hear whichever one suits them. If the number can move, the document should say what would move it and roughly by how much, before anybody signs. A range with a reason attached settles more disputes than a precise number that turns out to be wrong.
Signed at the door has a cooling off rule
Where a sale is agreed at the customer home rather than at your premises, the Federal Trade Commission cooling off rule gives the buyer a right to cancel within three days for qualifying sales, and the notice has to be given at the time. Whether it applies to a given job is a question for your own advisers, and the point is that it is a question, not an afterthought.
Where the estimate should live
Attached to the job it was written for, so the invoice that follows can be checked against it without anybody searching an inbox. That is the difference between a template you fill in and a record you keep: the template produces a document, and only the record answers the question of what was agreed six months ago.
Questions people ask about estimate template
How long should an estimate stand?
Long enough to be fair and short enough to protect you from a price change, which for most trades is between fourteen and thirty days. State it rather than leaving it open.
Should the estimate show labour and parts separately?
It depends on your market. What matters more is that whatever you show, the invoice matches it in shape, or every difference looks like a surprise.
Is an estimate binding?
That depends on how it is written and on your local law. This is exactly why the fixed or estimated line is worth stating plainly rather than leaving to be inferred.