This Estimate Template is a quick and easy way to send clients a professional-looking quote. Download this file and fill out the customizable fields. The estimate is then ready to email or print and mail. Estimates are predictions of how much a project will cost or how long it will take to complete. Once your client has agreed to work with you, there is no legal obligation to stick to those predictions; however, customers will be unhappy if your final invoice differs significantly from your initial quoted price. As a result, it is best to provide real-time and cost estimates.