GlossaryLive
What is a quotation (ใบเสนอราคา)?
A quotation is a document a seller prepares to offer prices for goods or services for a customer to consider before deciding to buy. It lists items or services, unit price, quantity, total, payment and delivery terms, and how long the price remains valid, such as 15 or 30 days. In the sequence quotation → invoice → billing note → receipt/tax invoice, the quotation is the starting point before any actual sale. Once the customer agrees to the quotation, the seller issues an invoice or billing note to collect payment, then a receipt and tax invoice once paid. Freelancers and small businesses should state the scope of work and terms clearly in the quotation to reduce disputes later.
Thai SME owners and Thai accountantsLast updated 2026-07-21
Lists items, price, payment and delivery terms, and price validity period
Once the customer agrees, the seller issues an invoice or billing note next
Not a tax document, but used to reference terms both parties agreed on
Freelancers should state scope and terms clearly to reduce later disputes
What should a freelancer include in a quotation?
It should include work or item details, unit price, quantity, total, payment terms such as a 50% deposit, the work or delivery timeline, and the price expiry date, so both freelancer and client agree before work starts.
Can a quotation turn directly into an invoice?
Yes. Once the customer agrees to the quotation, the seller typically issues an invoice or billing note referencing the same items to collect payment.
Is a quotation legally binding?
A quotation itself is not a contract, but once a customer accepts it in writing or pays a deposit, it is often treated as evidence of an initial agreement between the parties. For high-value work, check additional terms with a legal expert.
The quotation has expired but the customer still wants to buy — what should I do?
If the validity date has passed, the seller should issue a fresh quotation with a current date and terms rather than reuse the old one, since costs or prices may have changed. Issuing a new quotation lets both sides reference matching terms and reduces later disputes.
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A billing note bundles several invoices or delivery notes into one amount, collected on an agreed billing cycle.
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