Workflow: Estimate and Invoice in QBO

•Estimate: estimate is simply a quote issued to potential buyer who wants to have an idea of want it will cost him/her to buy your product Or service. The potential buyer is not obligated to make purchase even though he/she has collected the estimate.

•Invoice: Invoice is issued to a willing buyer who has expressed interest in your products and he/she is willing to pay for it. Invoice is issued for products or services to be rendered or there is strong hope that such products or services will be rendered.

•Estimate can be converted into invoice once the holder of the estimate indicates willingness to buy the goods or services.

For their differences follow the link below: Estimate Vs Invoice in QBO.pptx