The cost of database development depends on project scope, delivery time, data complexity, integrations, migration needs, security requirements and the level of customisation.
A simple database structure will have a different budget from a larger data environment connected with several applications, reporting tools, business systems and data sources. The cost may also depend on whether the project includes data migration, database optimisation, cloud setup, access control, analytics or ongoing support.
Fixed price works when the scope is clearly defined. Time and materials gives more flexibility when requirements may change during development.
A reliable estimate starts with understanding your data, users, systems, integrations, reporting needs and business goals.