There is no One cost for a Business Central upgrade. The final cost is dependent on how much data will be migrated, how much of the Business Central functionality will be used, how many customizations will be migrated, how many customized reports will be migrated and how much time you and your team are willing to put towards the project. However, Navisiontech offers three packages to give you an idea of the upgrade costs:
1) Kick Start: $9,999
2) Essential: $49,999
3) Solid Foundation: $99,999
These packages offer a comprehensive overview of the potential upgrade costs, and helping you plan and budget accordingly. https://www.navisiontech.com/navision-business-central/