When leaving Dynamics NAV, your main upgrade options are migrating to Microsoft Dynamics 365 Business Central (either on-premises or in the cloud) or switching to a different ERP platform altogether. For most organisations, Business Central is the natural next step because it shares the same underlying architecture as NAV, and Microsoft has positioned it as the official successor. The right path depends on your organisation’s size, technical environment, and long-term strategy, and the sections below walk through each option in detail.
What happens to Dynamics NAV after Microsoft ends support?
Microsoft has ended mainstream support for all versions of Dynamics NAV, with extended support for older versions already expired and the final extended support deadline for NAV 2018 set for January 2028. After that date, Microsoft will no longer release security patches, bug fixes, or compliance updates for Dynamics NAV. Running an unsupported ERP system exposes your organisation to security vulnerabilities, regulatory risk, and growing technical debt.
Beyond the security angle, staying on Dynamics NAV increasingly means falling behind. Integrations with modern tools become harder to maintain, new functionality is unavailable, and finding consultants with deep NAV expertise is becoming more difficult as the talent pool shifts toward Business Central. The longer you wait, the more complex and costly the eventual migration tends to become.
This makes 2026 a relevant moment for many organisations to take stock of where they stand and start planning their next move.
What are the main upgrade paths from Dynamics NAV?
Organisations leaving Dynamics NAV have three realistic upgrade paths: migrating to Dynamics 365 Business Central in the cloud, upgrading to Business Central on-premises, or switching to a different ERP platform entirely. The vast majority of NAV customers move to Business Central because of the shared codebase, familiar user experience, and Microsoft’s active investment in the platform.
Here is a quick overview of the three paths:
- Business Central Cloud (SaaS): Hosted by Microsoft, updated automatically twice a year, subscription-based pricing. The direction Microsoft actively promotes.
- Business Central On-Premises: Installed on your own infrastructure or a private cloud. More control over updates and customisations, but you manage your own upgrades.
- Switch to a different ERP: Moving to SAP, Oracle, or another platform. A more disruptive option that makes sense only in specific circumstances.
Choosing between these paths is not just a technical decision. It involves your IT strategy, budget model, customisation requirements, and how much change the organisation can absorb. Before committing to any roadmap, it is worth conducting a proper baseline assessment of your current processes and systems to understand what you are actually working with.
What is the difference between upgrading to Business Central on-premises and moving to the cloud?
The core difference is who controls the infrastructure and update cycle. With Business Central on-premises, your organisation owns the environment, manages the servers, and decides when to apply updates. With the cloud (SaaS) version, Microsoft handles all of that, and updates are applied automatically twice a year.
Each model has genuine trade-offs:
- On-premises gives you more control over customisations, data residency, and update timing. It suits organisations with strict data governance requirements or complex integrations that need careful management.
- Cloud (SaaS) reduces your internal IT burden, keeps you on the latest version automatically, and scales more easily. It is typically faster to deploy and has a lower upfront cost, though total cost of ownership over time depends on your usage and configuration.
One practical consideration: highly customised NAV environments often require significant rework before moving to the cloud, because Business Central SaaS has stricter limits on code modifications than on-premises. Understanding the extent of your customisations early is important, and this is exactly the kind of analysis that a thorough data migration and process review should surface before any technical work begins.
How complex is a NAV-to-Business Central migration?
A NAV-to-Business Central migration ranges from moderately complex to highly complex depending on how many customisations your NAV environment contains, how clean your data is, and how many integrations need to be rebuilt or replaced. Standard, lightly customised NAV implementations can migrate relatively smoothly. Heavily modified environments with years of accumulated custom code require significantly more effort.
The main complexity drivers include:
- Custom code and extensions: NAV customisations built in C/AL need to be rewritten in AL for Business Central. The more custom logic exists, the more development work is needed.
- Data quality: Legacy NAV databases often contain years of inconsistent or duplicate data. Data migration is rarely a simple lift-and-shift, and rigorous As-Is/To-Be analysis is needed to map what moves, what gets cleaned, and what gets left behind.
- Integrations: Connections to third-party systems, warehouses, or reporting tools often need to be rebuilt for the new environment.
- User adoption: Even though Business Central is familiar to NAV users, the interface and workflows have changed enough to require structured change management.
Organisations that underestimate the data migration phase in particular tend to run into go-live problems. Ensuring data integrity before cutover is not optional. We cover our full range of services for exactly this kind of migration complexity.
When should an organisation consider switching to a different ERP instead of upgrading?
Switching to a different ERP platform instead of upgrading to Business Central makes sense when your organisation has outgrown what Business Central can realistically support, when your industry has specific requirements that another platform handles better, or when a merger or acquisition has already standardised the wider group on a different system such as SAP or Oracle.
Switching ERP platforms is a significantly larger undertaking than upgrading within the Microsoft ecosystem. It typically involves higher implementation costs, longer timelines, more extensive change management, and a steeper learning curve for end users. For most mid-market organisations currently on Dynamics NAV, the Business Central upgrade path is the more proportionate choice.
That said, the decision should not be made on inertia alone. If your processes have become substantially more complex, if you are expanding into new regions with different compliance requirements, or if Business Central’s functional scope genuinely does not cover your needs, a broader ERP evaluation is worth the effort. The starting point in either case is the same: a clear-eyed assessment of where your organisation actually stands today, before any budget or vendor commitment is made.
How Optinus helps with your Dynamics NAV upgrade
We help organisations navigate the full journey from Dynamics NAV to their next ERP environment, whether that is Business Central in the cloud, on-premises, or a different platform altogether. Here is what that looks like in practice:
- Maturity assessment: Before any roadmap is agreed, we give you a clear baseline of your current processes, data quality, and system maturity so you know exactly what you are working with.
- Data migration management: We use rigorous As-Is/To-Be analysis and structured testing procedures to ensure data integrity throughout the migration, preventing data loss and errors at go-live.
- Cutover management: We plan and monitor the cutover end-to-end, including hypercare and aftercare, so operational continuity is never put at risk.
- Change management: We address both the technical and human side of the transition, helping your teams genuinely adopt the new system rather than just complete a training module.
- On-site and remote delivery: We work with organisations across the Netherlands, Belgium, and internationally, both on-site and remotely.
Ready to take the next step? Get in touch with our team to discuss your situation, or learn more about what we do and how we approach ERP transformations.
