It comes down to scope, but here's the honest range. A focused single-purpose tool - an order tracker, a basic inventory or invoicing tool, a simple CRM - can start at the 50,000 BDT tier when the feature list is genuinely tight. Add user roles, reports, dashboards and bKash/Nagad integration and you're at the 90,000 to 1,50,000 BDT tiers. A full custom system built from scratch, with multiple modules and user types connected to your other tools, starts at 3,00,000 BDT. I quote one fixed price after a scoping call, paid 50% advance and 50% on launch via bKash, Nagad or bank transfer - no vague range to drag you into three meetings.