Building an online store in Thailand involves more than just listing products. You need reliable payment gateways (PromptPay QR, credit cards, bank transfer), clear shipping calculations, and a friction-free mobile checkout. A well-architected e-commerce website usually costs between ฿65,000 and ฿180,000 depending on catalogue volume and backend integrations. Ongoing fees include hosting, domain registration, and gateway transaction charges. Unlike selling solely through marketplace apps where you compete on price alone and pay commission fees, owning your own website lets you build direct customer relationships and higher average order values.