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A quotation doesn't just state a price; it's the first document a customer uses to judge what kind of tradesperson you are. A complete, easy-to-read quotation often wins the job without discounting
Your store or contractor name, address, phone, tax ID (if any) and logo; on the customer side, their name and the site location, plus the quotation number and date. The document number matters more than you'd think, because after many rounds on LINE, customers refer to it
Split rows by work category, e.g. site preparation, structure, architectural, MEP. Each row has description · quantity · unit · unit price · total. A quotation with one line saying "total construction cost 850,000 baht" will certainly get haggled, because the customer can't tell what's expensive and what's cheap
For work including materials, show how much is materials and how much is labor. Besides looking transparent, it helps you when material prices rise mid-job, because you have a basis for discussing which part moved
Cement, steel, tiles, paint — specify the brand or grade. If you just write "standard materials", customers will compare your price with someone using cheaper materials, and you'll lose even though yours are better
How long the price is valid (7–30 days recommended, since material prices keep moving) · payment milestones · work duration · warranty · and most importantly "what this price excludes". Listing exclusions fully will help you on site more than listing inclusions
State whether the price includes VAT. If the customer is a company, they'll withhold 3% tax from the contract price — write in the conditions how this is handled, so there's no argument at billing time
Create quotations in your store's name with your logo and colors, pull reference prices from the marketplace, and share via LINE or print to PDF
On its own it isn't binding until the other party accepts, but once the customer signs it, a quotation can become evidence of the agreement — so write its conditions as completely as a mini contract
Construction quotations are usually valid for 7–30 days, because prices of materials like steel and cement can move in the short term. If valid longer, include a clause adjusting the price to material prices
No. An individual contractor can issue quotations in their own name, but the document should include their ID number and a real contact address
For construction, which is a contract for work, a corporate payer withholds 3% of the contract price and issues a withholding tax certificate to the contractor
This page is general information for basic understanding, not legal or tax advice. The figures, rates and conditions mentioned are those commonly used in the market and may differ from your case; check with a professional or the relevant authority before using them for real work