Why contracting work needs clear paperwork
Building work is usually paid in stages: a deposit before you start, payments as work progresses, and a final payment on handover. A quotation that sets out the stages from the start avoids disputes when you collect.
Company customers withhold 3% from hire-of-work payments under an agreement worth 1,000 baht or more. An invoice showing the deduction and the net amount keeps both sets of books in line.
What a construction quotation should include
- Scope of work and site address
- Materials and labour as separate lines, with quantities and units
- Work period
- Deposit and payment stages, each with its due date
- VAT 7% (registered businesses only) and the total
- How long the price is valid
- Workmanship guarantee, if any, and a line for the customer to accept
From quotation to the final stage
- Quote on site — materials and labour you use often are saved for reuse
- Add a deposit and stages — up to 5 stages, each with a due date (Pro)
- Agreed → invoice — one tap, and the stages come with it
- Get paid stage by stage — mark each stage paid, then issue the receipt
Deposit and stage payments PRO
Add a deposit and up to 5 stage payments on one document, each with its own due date, and mark each stage paid as it comes in.
3% withholding tax PRO
Switch it on per invoice; the deduction and the net amount are shown clearly for company customers.
Security deposit kept apart PRO
A refundable security deposit is its own line and is never included in the VAT totals.
Quote → invoice in one tap
Once the customer agrees, one tap turns the quote into an invoice with the same items, customer details and payment terms — no retyping.
Part payments and receipts
Record a part payment or the balance, then create the receipt PDF straight away.
PromptPay QR on the invoice PRO
Your PromptPay number becomes a QR the customer can scan to pay, on invoices charged in baht.

