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How big is it?
What must it have?

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Estimated price

Website · Small

฿23,970–฿31,960

Effort
3–4 man-days
Timeline
about 1 week

What’s included

  • Scoping, then a fixed written quote
  • Design and development
  • Testing and go-live

What pushes it up

  • Connecting several existing systems, or ones without an API
  • User groups that see different data
  • Moving a lot of old data
  • Supporting several languages

What brings it down

  • Start with the core features, add the rest later
  • Use ready-made services for login or payments instead of building them
  • Have the content and design ready from day one

How we calculate

We start from the man-day band published on our pricing page for the project type. The size picks its lower, middle or upper third. Each must-have adds its own man-days, sized the same way. The total × the starting rate of ฿7,990 per man-day is the price. Timeline = man-days ÷ 5 man-days a week. See pricing

See every assumption and source
ItemMan-daysSource
Website3–5Pricing page band: “Custom company website”
Web app / back office15–35Pricing page band: “Custom web app / back-office system”
Mobile app15–35Pricing page band: “Custom web app / back-office system” No mobile band is published yet. An app has the same parts as a web app (screens, back office, login), so it uses that band. App Store / Google Play developer fees are extra.
LINE OA chatbot10–18Pricing page band: “AI chatbot / LINE OA bot”
System integration15–30Pricing page band: “ERP integration & customization” No integration band is published yet. Connecting ERP, accounting, LINE and an online shop is the work this row prices, so it uses that band.
Project size⅓Small = lower third, medium = middle third, large = upper third, rounded to whole man-days — our assumption.
Members / login+2–3Our assumption, 2–3 man-days: sign-up, login, password reset and user roles on a ready-made sign-in service such as LINE or Google.
Online payments+3–5Our assumption, 3–5 man-days: one Thai payment gateway (cards + PromptPay QR), payment notifications, receipts and the go-live review. Gateway fees are extra.
Admin back office / dashboard+5–15Published example: dashboard development, 5–15 man-days.
LINE integration+5–8Published example: a LINE OA auto-reply flow that hands off to staff, 5–8 man-days (AI automation service).
AI feature+3–6Published example: AI reading documents (OCR) into your system, 3–6 man-days (AI automation service).
Price per man-day฿7,990Starting rate on our pricing page.
Timeline5 a weekThe MVP delivery pace we publish.

A planning estimate only, not a quote. All amounts are in Thai baht.