When you use the QuickBooks estimates feature, no transactions are recorded on your company income statement or balance sheet. The estimate is not treated as a sale, so the form is for your information only. You can create reports that display pending estimates, but your company's financial statements contain only completed transactions.
When jobs are invoiced to customers, even if the job is still in progress, the amount that has been invoiced increases both your income and your Accounts Receivable accounts. Any unbilled portion of the estimate continues to remain off your books.
Partial completion of a job, invoiced to a customer for $500, is recorded like this when you issue the invoice: