What every estimate shows
- your business name and how to reach you
- the client's name and address
- a reference number and the date
- the work, line by line, with quantities and prices
- VAT if you are VAT registered, or sales tax where it applies
- the total, and the date the price holds until
- what is not included, and how to accept
The last two go under Terms. Listing what is left out (skip hire, making good, decorating) prevents most arguments about the final bill.