Estimates have an acceptance deadline — by default, 30 days after you create (or renew) them. If a customer doesn't accept before then, the estimate is marked expired. Renewing gives it a fresh deadline so the customer can still accept it.
Spotting an expired estimate
On the Estimates page, an expired estimate is labeled expired next to its acceptance deadline. In place of the usual accept? button, you'll see a renew? button on that estimate's row.
Renewing it
Click renew? on the estimate's row. Estimation Builder resets the acceptance deadline to a fresh 30-day window starting today, and the estimate is active again — ready for the customer to accept. Nothing else changes: the line items, totals, and description stay exactly as they were.
Tip: Your acceptance window is shown at the top of the Estimates page: “Your estimate acceptance deadline is 30 days after creation (or renewal).”
Related: Estimate statuses.