In focus
What actually drives the price of a web app in Bangladesh
Most BD clients ask "web application koto taka?" and expect a one-line answer. Most companies oblige with a one-line lie. The honest version is this. A web app's price depends on user roles, integrations and how complex the data is, not on page count. A single-role attendance tracker with 4 screens and a CSV export is truly a 50,000 to 90,000 BDT job.
Now add admin roles, approval steps, bKash and Nagad payments and PDF invoices. Add role-based permissions and an Excel-style report builder. Then you are at 1,50,000 BDT. That is still fair, because it is about four weeks of senior work, not four months of junior fumbling.
Custom SaaS-style builds start at 3,00,000 BDT. These include dashboards for many tenants, subscription billing, live alerts, a mobile-friendly admin and an audit log your accountant won't laugh at. They need real engineering. That means queues for slow jobs, a sensible cache layer, careful database migrations, a staging server and tests for the parts that handle money.
Some "web application development company" in BD may quote you 80,000 BDT for that. If so, they are either handing it to a fresh CSE graduate or planning to ship the first 30% and vanish. I'd rather you go elsewhere than become the next Facebook group post about a half-built portal.