Dynamics 365 On-Premise vs Cloud – Cost, Security & Performance Comparison
"Why can't we just keep it in our own data center, like we did with AX?" We hear that question at the start of most of our AX migration projects, and it's a fair one. Many of our manufacturing and financial services clients ran Dynamics AX on their own servers for years, had capable infrastructure teams, and rarely had a serious outage. Moving to someone else's cloud can feel like giving up control for no obvious reason.
The honest answer is that on-premises Dynamics 365 still exists and still has a place, but the gap between on-premises and cloud widens with every release, especially for Copilot and the Power Platform.
This article compares both deployment models for Microsoft's two ERP products: Business Central (online vs on-premises) and Dynamics 365 Finance and Supply Chain Management, often called finance and operations (cloud vs on-premises, which Microsoft calls local business data). We'll cover cost structure, updates, security responsibility, performance and feature availability, then migration considerations. It's written for CFOs, IT directors and operations leaders deciding where their ERP should run for the next decade.
What Are the Deployment Options for Dynamics 365?
Business Central: Online vs On-Premises
Business Central online is Microsoft's SaaS offering, hosted on Azure and operated by Microsoft, and licensed per user per month (Essentials, Premium and Team Members are the main user types). Microsoft runs the infrastructure, applies updates and handles backups.
Business Central on-premises is the same core product installed on infrastructure you control, either your own servers or virtual machines run by a partner or hosting provider. You're responsible for SQL Server, the service tier, backups and upgrades. Licensing options have historically included perpetual and subscription models, but Microsoft adjusts on-premises terms over time, so confirm what's currently available before you build a cost model.
Finance and Operations: Cloud vs On-Premises
Cloud is Microsoft's standard deployment for Finance and Supply Chain Management. Microsoft manages the production environment, including sizing, high availability, disaster recovery and monitoring, while customers manage configuration, extensions and sandbox environments for testing.
On-premises (local business data) runs the application on your own infrastructure using Service Fabric standalone clusters and SQL Server, with deployment still orchestrated through Microsoft's Lifecycle Services tooling. It exists mainly for organizations with data-sovereignty, regulatory or connectivity constraints. It's a narrower path, with fewer customers, a reduced feature set and more operational burden, so we always check Microsoft's current roadmap before recommending it.
How Do On-Premises and Cloud Compare at a Glance?
| Dimension | Cloud (BC online, F&O cloud) | On-premises (BC on-premises, F&O local business data) |
|---|---|---|
| Cost structure | Per-user subscription; hosting, platform and DR included | Licenses plus hardware, SQL Server, Windows Server, backup, DR and staff time |
| Updates | Delivered by Microsoft on a regular cadence, with limited scheduling flexibility | You choose timing but must stay on supported versions; upgrades are your projects |
| Security responsibility | Shared: Microsoft secures infrastructure and platform; you own identity, roles and data | Yours end to end, from physical security to patching |
| Performance management | Microsoft sizes and scales production; you own code and integration efficiency | Full control of hardware and database tuning, and full responsibility for it |
| Copilot and AI | Available, with new capabilities arriving regularly | Not available |
| Power Platform and Teams | Native integration with Dataverse, Teams and Power Automate | Limited; some scenarios unavailable, others need gateways or custom work |
| Customization model | Extensions only; no direct database access | Extensions, with more latitude (for example .NET interop in BC) |
How Do Costs Compare Between On-Premises and Cloud?
Cloud cost is mostly visible: a per-user subscription that includes the application, hosting, the production platform and disaster recovery. Storage beyond your entitlement costs extra, and you'll still pay for implementation, partner support and any ISV apps.
On-premises cost is mostly hidden. The license line looks familiar, but the total also includes servers or VMs, SQL Server and Windows Server licensing, backup and DR infrastructure, monitoring and security tooling, and the internal or partner time to patch, monitor and upgrade it all. Suppose, hypothetically, your infrastructure team spends two days a month maintaining the ERP stack. That's about 24 days a year before a single version upgrade, and on-premises upgrades are typically separate projects with their own budgets.
In our experience, on-premises can look cheaper over five years when an organization already owns modern hardware, has spare infrastructure capacity, and doesn't count staff time. Add a hardware refresh, a DR site and honest labor costs, and the comparison usually tilts toward the cloud. It depends on your situation, so build both models line by line, and check current Microsoft pricing rather than relying on figures from older proposals.
How Do Updates and Upgrades Differ?
Business Central online receives two major releases a year, in spring and fall, plus regular minor updates. Administrators can choose an update date within a window Microsoft defines, and your partner should test extensions and integrations in a sandbox before each major update.
Finance and operations in the cloud follows Microsoft's continuous update model, often called One Version, with several service updates a year and the ability to pause a limited number of them. Microsoft's Regression Suite Automation Tool helps automate business-process testing before each update.
On-premises, you decide when to update, which sounds like freedom. In practice you must stay within Microsoft's supported versions, and skipping updates turns each upgrade into a bigger, riskier jump. We regularly meet on-premises customers several versions behind who now face a larger catch-up project than steady updating would have required.
Who Is Responsible for Security in Each Model?
In the cloud, security is a shared responsibility. Microsoft secures the physical data centers, network, hosts, operating systems and platform, encrypts data at rest, manages backups, and publishes compliance documentation (such as ISO 27001 certificates and SOC reports) through its Service Trust Portal. You remain responsible for identity and access through Microsoft Entra ID, including multifactor authentication and conditional access, plus security roles, segregation of duties, integration credentials, user access reviews and the devices your people work from.
On-premises, every layer is yours: physical security, network segmentation, OS and SQL Server patching, encryption, backups, disaster recovery and penetration testing. Some organizations have the people and processes to do this well. Many mid-size organizations, honestly assessed, don't.
For our financial services clients, the practical questions are usually about data residency (choosing the Azure region where data is stored), auditor access to evidence, and the vendor due-diligence package regulators expect. In our experience, those questions are answerable in the cloud with proper documentation.
How Does Performance Compare?
On-premises gives you full control: you choose the hardware, tune SQL Server and keep traffic on your own network. For a single site with a fast LAN, that can feel very responsive. But you also have to size for peaks like month-end and year-end, maintain DR replicas and refresh hardware every few years.
In the cloud, Microsoft sizes and scales the production environment, but you can't tune the database directly. That's why cloud performance problems almost always trace back to things you control: inefficient customizations, heavy reports run during business hours, integrations that make thousands of small API calls instead of batched ones, and batch jobs scheduled on top of each other. Business Central can send telemetry to Azure Application Insights, and finance and operations offers its own monitoring and diagnostics tools, so problems can be diagnosed.
Two practical cloud considerations: users far from your environment's Azure region will see more latency, and plants or warehouses with unreliable internet need redundant connectivity. In most cases that's a network design task, not a reason to stay on-premises.
Which Dynamics 365 Features Are Cloud-Only?
This is where the gap is widening fastest.
- Copilot and AI features are cloud-only, both in Business Central online and across finance and operations apps.
- Power Platform integration is built for the cloud. In finance and operations, capabilities such as dual-write and virtual tables in Dataverse depend on a cloud deployment. In Business Central, Teams integration and several Power Platform scenarios are online-only.
- Modern analytics paths, such as synchronizing finance and operations data into Microsoft Fabric or a data lake for reporting, are designed for cloud environments.
- Many AppSource apps for Business Central are published for online only.
If AI and automation are on your roadmap, as they are for most of our clients, this is often the deciding factor. Our guide to Copilot use cases in Dynamics 365 shows what's at stake.
When Does On-Premises Still Make Sense?
On-premises remains a reasonable choice in a few situations: strict contractual or regulatory requirements that no available Azure region can meet; sites with genuinely unreliable connectivity where ERP must keep running; a recent infrastructure investment with years left to depreciate; or Business Central solutions that depend on on-premises-only capabilities, such as .NET interop, while a redesign is planned. Even then, we'd treat it as a deliberate, time-limited decision with a cloud plan behind it.
What Should You Consider When Migrating to the Cloud?
- Inventory customizations and integrations. Decide what to retire, rebuild as an extension or replace with standard functionality.
- Use Microsoft's migration paths. Business Central online includes cloud migration tooling for supported on-premises versions and for Dynamics GP; older NAV versions usually need upgrading first. AX 2012 customers move to finance and operations using Microsoft's upgrade tooling for data and code.
- Plan identity early. Microsoft Entra ID becomes the front door, so tidy up accounts, groups and multifactor authentication before cutover.
- Rework integrations. Direct database connections must become API-based integrations.
- Test with real volumes. Run performance tests on month-end-sized workloads, not a handful of transactions.
- Prepare for the update cadence. Build a repeatable test routine for each release before go-live, not after the first update surprises you.
If you're still choosing between products as well as deployment models, this comparison of Dynamics 365 Finance and Business Central is a useful companion.
Key takeaway: On-premises Dynamics 365 trades visible subscription costs for hidden infrastructure, security and upgrade costs, and it gives up Copilot and much of the Power Platform. For most organizations, cloud should be the default and on-premises a deliberate, documented exception.
Conclusion
Choosing between on-premises and cloud Dynamics 365 comes down to cost structure, who carries security and upgrade responsibility, how performance is managed, and which features you need. On-premises offers control and can suit specific regulatory or connectivity constraints. The cloud offers a managed platform, a predictable update rhythm and access to Copilot and the wider Power Platform, which is where Microsoft's investment is concentrated.
Build an honest, line-by-line cost model, test your performance and connectivity assumptions, and plan the migration around your customizations and integrations.
If you'd like a second opinion on the right deployment model for your Dynamics 365 estate, the team at Cobalt Ridge 365 would be glad to help.
Frequently Asked Questions
Is Dynamics 365 Business Central available on-premises?
Yes. Business Central can be deployed on your own servers or hosted by a partner, as well as used online as Microsoft's SaaS service. The on-premises version lacks some online-only capabilities, including Copilot, and you're responsible for infrastructure and upgrades.
Can Dynamics 365 Finance and Supply Chain Management run on-premises?
Yes, through the on-premises option Microsoft calls local business data. It's intended mainly for organizations with regulatory, data-sovereignty or connectivity constraints, and it has a narrower feature set than the cloud version. Check Microsoft's current guidance before choosing it.
Is Copilot available in Dynamics 365 on-premises?
No. Copilot relies on Microsoft's cloud AI services and is available only in cloud deployments of Dynamics 365. Organizations that want Copilot need a plan to move to the cloud.
Is cloud ERP more secure than on-premises?
It depends on what you're comparing. Microsoft invests in infrastructure security at a scale few organizations can match, but cloud security is shared, and weak identity controls or overly broad roles remain your responsibility. A well-run on-premises environment can be secure; an under-resourced one is usually less secure than the cloud.
Is on-premises cheaper than cloud in the long run?
Sometimes, on paper. On-premises can look cheaper when existing hardware and staff time aren't fully counted. Once you include hardware refresh, disaster recovery, patching, monitoring and upgrade projects, the cloud is often comparable or cheaper, but you should model both for your own situation.
