State the date until which you can honour the amount and availability. Explain what may change after it, such as materials, transport, or schedule. For supplier-dependent work, confirm stock before accepting a deposit.
Set the validity period according to how long you can hold the labour schedule, supplier quote, or materials allowance—not an arbitrary deadline. State what may need rechecking after expiry and whether the proposed start date is reserved. If a client is deciding, answer reasonable questions without using false scarcity. Reissue the quote when an assumption changes and keep the older version for reference.
Tell the customer how to request an extension if a decision is delayed, without implying that the old price is guaranteed.
Make the expiry date easy to find and explain how to request a refreshed estimate. Say whether materials or scheduling must be rechecked. Apply validity consistently and honour a current written commitment unless the customer changes scope or timing.
If the customer needs more time, recheck costs and availability rather than silently changing terms. Add your quote process to a KobStore service page; create one and make the next step clear.
