It depends entirely on scope, but here is the honest range. A focused single-purpose internal tool — an order tracker, a basic inventory or invoicing tool, a simple CRM — can start at 50,000 BDT when the feature list is tight. Add user roles, reports, dashboards and integrations and you are at the 90,000 to 1,50,000 BDT tiers. A full custom software system built from scratch — multiple modules, multiple user types, connected to your other tools — starts at 3,00,000 BDT. I quote a fixed price after one requirements call, and it is 50% advance, 50% on launch.